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1.
Cambios rev. méd ; 22 (2), 2023;22(2): 921, 16 octubre 2023. ilus., tabs.
Article in Spanish | LILACS | ID: biblio-1526591

ABSTRACT

INTRODUCCIÓN. La nefropatía por poliomavirus BK resulta un problema emergente en el trasplante renal, pues contribuye a la pérdida temprana de los injertos renales. OBJETIVO. Caracterizar clínicamente a los pacientes trasplantados renales con nefropatía por poliomavirus BK. MATERIALES Y MÉTODOS. Estudio observacional, descriptivo, realizado en el Hospital de Especialidades Carlos Andrade Marín en el período 2013-2022, se obtuvo una base de datos anonimizada, 479 pacientes trasplantados renales, de estos se identificaron 37 pacientes que corresponde a un 7,7% con nefropatía por poliomavirus BK, se realizó un análisis con el programa estadístico SPSS v26®. RESULTADOS. La población estuvo caracterizada por pacientes del sexo masculino (56,8%), con una edad media de 48,2 años, el donante cadavérico fue el más frecuente (94,5%), la mayor parte del tratamiento de la nefropatía por poliomavirus BK consistió en cambio de micofenolato sódico a everolimus y se mantuvo con 50% de Tacrolimus y Prednisona (40,5%); al valorar el cambio de los valores de creatinina, los niveles más elevados fueros a los 12 meses cuando la pérdida renal fue temprana (p: 0,042), y de la misma manera a los 12 meses, fueron más elevados los niveles de creatinina cuando el diagnóstico histopatológico fue Nefropatía por Poliomavirus Clase 3 (p: 0,01). DISCUSIÓN. La prevalencia de la nefropatía se mantuvo por debajo del 10% reportado a nivel global, la creatinina empeoró en pacientes con pérdida temprana del injerto renal y con una clase patológica avanzada, hecho reportado en la fisiopatología de la enfermedad. CONCLUSIÓN. La pérdida del injerto renal temprano presentó una creatinina más alta que la tardía. Es recomendable un tamizaje adecuado para la detección temprana del virus BK siendo crucial para prevenir el deterioro de la función renal y limitar la posterior pérdida del injerto.


INTRODUCTION: BK polyomavirus nephropathy is emerging as a significant concern in kidney transplantation, as it contributes to the early loss of renal grafts. OBJECTIVE: The aim of this study was to clinically characterize renal transplant recipients with BK polyomavirus nephropathy. MATERIALS AND METHODS: An observational and descriptive study was conducted at Carlos Andrade Marín Specialties Hospital during the period of 2013 to 2022. An anonymized database comprising 479 renal transplant patients was utilized. Among these, 37 patients, constituting 7.7%, were identified with BK polyomavirus nephropathy. Data analysis was performed using the statistical program SPSS v26®. RESULTS: The study population was predominantly composed of male patients (56.8%) with a mean age of 48.2 years. Deceased donors accounted for the majority (94.5%) of cases. The primary approach for managing BK polyomavirus nephropathy involved transitioning from mycophenolate sodium to everolimus, alongside maintaining a regimen of 50% tacrolimus and 40.5% prednisone. When assessing changes in creatinine values, the highest levels were observed at 12 months, coinciding with early renal loss (p: 0.042). Similarly, at the 12-month mark, elevated creatinine levels were associated with a histopathological diagnosis of Polyomavirus nephropathy Class 3 (p: 0.01). DISCUSSION: The prevalence of nephropathy remained below the globally reported threshold of 10%. Creatinine levels worsened in patients experiencing early graft loss and an advanced pathological classification, aligning with established disease pathophysiology. CONCLUSION: Early renal graft loss was associated with higher creatinine levels compared to delayed loss. Adequate screening for early detection of BK virus is recommended, as it plays a crucial role in preventing renal function deterioration and limiting subsequent graft loss.


Subject(s)
Humans , Male , Female , Middle Aged , Kidney Transplantation , BK Virus , Viral Load , Creatinine , Renal Insufficiency, Chronic , Immunosuppressive Agents , Tissue Donors , Polyomavirus , Ecuador , Kidney Diseases
2.
Prensa méd. argent ; 109(2): 53-57, 20230000.
Article in Spanish | LILACS, BINACIS | ID: biblio-1437022

ABSTRACT

Se acepta que los individuos infectados por el virus de la inmunodeficiencia humana (HIV) son incapaces de transmitir la infección por vía sexual mientras sus niveles de carga viral plasmática se mantengan indetectables. Con el propósito de estudiar qué porcentaje de infectados por el HIV cumple esa condición estudiamos una población de pacientes asistidos regularmente en un hospital general de agudos de la ciudad de Buenos Aires. Se incluyeron 298 individuos, 162 de ellos de sexo masculino (54.36%) con una edad (promedio ± desvío estándar) de 47.83 ± 11.69 años y un recuento de células CD4+ de 693.93 ± 363.87 x 106 células / mL de sangre periférica. La carga viral plasmática fue indetectable en 230 de los individuos estudiados (77.81%). Los 68 restantes (22.82%) mostraron en promedio 9856.67 ± 70922.11 copias / mL, siendo estos niveles mayores en hombres que en mujeres (17379.39 ± 95521.51 copias / mL vs 895.78 ± 5952.99 copias / mL, respectivamente; p=0.015, Student t test), lo que explicaría los recuentos de linfocitos CD4+ significativamente menores hallados en hombres.187 de 231 individuos que recibían su primer tratamiento antiretroviral (TARV) mostraron cargas virales indetectables (80,95%) versus 42 de 67 pacientes que habían recibido dos o más esquemas de tratamiento antirretroviral (61,69%; p= 0.002, prueba de 2 ). Estos resultados muestran que un porcentaje importante de infectados por el HIV continúan presentando cargas virales plasmáticas detectables a pesar del TARV, siendo capaces de transmitir la infección por vía sexual a sus parejas


It is widely accepted that HIV-infected subjects are incapable to transmit sexually the infection while their plasmatic viral load remains undetectable. In order to assess the percentage of HIV infected patients showing undetectable viral loads during their antiviral treatment we studied a population of patients regularly assisted at a general hospital. A total of 298 patients (162 men; 54.36%) were admitted to the study. The mean age was (mean ± standard deviation) 47.83 ± 11.69 years, and the mean CD4+ cell count was 693.93 ± 363.87 x 106 cells / mL. These variables did not showed statistically significative differences between men and women. Plasmatic viral load was undetectable in 230 patients (77.81%). The remaining 68 patients (22.82%) showed a mean of 9856.67 ± 70922 copies / mL. These values were higher in men than in women (17379.39 ± 95521.51 copies / mL vs 895.78 ± 5952.99 copies / mL, respectively; p=0.015, Student t test). In line with these findings, CD4+ cell count was significantly lower in men (575.10 ± 345.14 cells / L vs. 707.04 ± 373.46 cells / L, respectively; p=0.0019, Student t test). 187 out of 231 patients receiving their first antiretroviral treatment showed undetectable viral loads (80,95%), while only 42 out of 67 patients having previously received other antiretroviral schemes had undetectable levels of plasmatic viral load (61,69%; p= 0.002, 2 ). These findings show that an important number of patients may keep detectable levels of plasmatic viral load during antiretroviral treatment, being therefore capable to sexually transmit the infection to their couples.


Subject(s)
Humans , Male , Female , HIV/immunology , Viral Load , Antiretroviral Therapy, Highly Active
3.
Arq. ciências saúde UNIPAR ; 27(3): 1123-1128, 2023.
Article in English | LILACS | ID: biblio-1425442

ABSTRACT

An 81-year-old woman, long-term non-progressor HIV infected, asymptomatic, not using ART, with a seven-year clinical follow-up in a reference unit, TCD4+ cell count values ranged from 719 to 1151 cells/µl, TCD8+ from 579 to 897 cells/µl and a viral load with higher value of 51 viral copies/ml but with undetectable results in most of the tests performed. The report of the long-term non-progressor HIV carrier aged over 80 years is somewhat unusual, considering the physiological/immunological changes that occur with the aging process concomitantly with HIV infection.


Mulher de 81 anos, infectada pelo HIV há muito tempo, não progressor, assintomática, sem uso de TARV, com acompanhamento clínico de sete anos em unidade de referência, os valores de contagem de células TCD4+ variaram de 719 a 1151 células/ µl, TCD8+ de 579 a 897 células/µl e uma carga viral com maior valor de 51 cópias virais/ml, mas com resultados indetectáveis na maioria dos testes realizados. O relato do portador de HIV de longa data não progressor com idade superior a 80 anos é um tanto incomum, considerando as alterações fisiológicas/imunológicas que ocorrem com o processo de envelhecimento concomitante à infecção pelo HIV.


Mujer de 81 años, infectada por VIH no progresor de larga evolución, asintomática, no usuaria de TAR, con seguimiento clínico de siete años en una unidad de referencia, los valores de recuento de células TCD4+ oscilaron entre 719 y 1151 células/ µl, TCD8+ de 579 a 897 células/µl y una carga viral con mayor valor de 51 copias virales/ml pero con resultados indetectables en la mayoría de las pruebas realizadas. El reporte de portadores de VIH no progresores a largo plazo mayores de 80 años es algo inusual, considerando los cambios fisiológicos/inmunitarios que ocurren con el proceso de envejecimiento concomitante con la infección por VIH.


Subject(s)
Humans , Female , Aged, 80 and over , Aging/physiology , HIV Non-Progressors , Aged/physiology , HIV Infections/immunology , Viral Load/physiology
4.
Article in English | AIM | ID: biblio-1517950

ABSTRACT

Background Optimal viral load suppression results from good adherence to treatment. The viral load suppression advantages include the reduction of virus transmission. In Rwanda, however, viral load suppression among adolescents and young adults has been proven relatively low than in other age groups. Objectives To assess the factors associated with viral load suppression among adolescent and young adults in Ngororero district, Rwanda. Methods A cross sectional study that included 151 adolescents and young adults aged from 15 to 24 years was conducted in Ngororero district. Data were entered in Epi-Info version 7 software and analyzed using STATA15. Results Females and males were 68% and 32% respectively. Sixty percent of the participants were aged20-24 years. Multivariable analysis revealed the factors associated with viral load suppression: Ubudehe category 2, P= 0.016, AOR = 6.6, CI [1.4, 31.1]; ubudehe category 3, P= 0.004, AOR = 8.9, CI [2.01,39.8]; spending between 5 to 9 years on ART, P= 0.022, AOR = 0.16 [CI0.03, 0.89;) and often forget to take medication, P= 0.011, AOR = 0.35, CI [0.13, 0.97.] Conclusion Viral load suppression among adolescents and young adults was low. Improving socio-economic conditions of adolescents and young adults, as well as provision of continuous counselling to them during their whole treatment life can improve significantly their adherence.


Subject(s)
Humans , Male , Female , Adolescent , Adult , HIV Infections , Viral Load , Therapeutics
5.
Ethiop. med. j. (Online) ; 61(1): 61-69, 2023. figures, tables
Article in English | AIM | ID: biblio-1416232

ABSTRACT

Background: Understanding the COVID-19 disease course in terms of viral shedding is important to assist in providing a tailored isolation and treatment practice. Therefore, the current study aimed to estimate time to viral clearance and identify determinants among SARS-CoV-2 infected individuals admitted to Millennium COVID-19 Care Center in Ethiopia. Methods: A Prospective observational study was conducted among 360 randomly selected SARS-CoV-2 infected individuals who were on follow up from 2nd June to 5th July 2020. Kaplan Meier plots, median survival times, and Log-rank test were used to describe the data and compare survival distribution between groups. Association between time to viral clearance and determinants was assessed using the Cox proportional hazard survival model, where hazard ratio, P-value, and 95% CI for hazard ratio were used for testing significance Results: The Median time to viral clearance was 16 days. The log-rank test shows that having moderate and severe disease, one or more symptoms at presentation, and presenting with respiratory and constitutional symptoms seems to extend the time needed to achieve viral clearance. The Final Cox regression result shows that the rate of achieving viral clearance among symptomatic patients was 44% lower than patients who were asymptomatic (AHR=0.560, 95% CI=0.322-0.975, p-value=0.040). Conclusions: Presence of symptoms was found to be associated with delayed viral clearance implying that symptomatic patients are more likely to be infectious and therefore, attention should be paid to the practices regarding isolation and treatment of COVID-19 patients.


Subject(s)
Humans , Male , Female , Safety Management , Coronavirus Infections , SARS-CoV-2 , COVID-19 , Viral Load
6.
Chinese Journal of Hematology ; (12): 284-288, 2023.
Article in Chinese | WPRIM | ID: wpr-984616

ABSTRACT

Objective: To determine the optimal cutoff value of Epstein-Barr virus (EBV) DNA load that can assist in the diagnosis of post-transplant lymphoproliferative disease (PTLD) after haploidentical hematopoietic stem cell transplantation (haplo-HSCT) . Methods: The data of patients with EBV infection after haplo-HSCT from January to December 2016 were retrospectively analyzed. Through constructing the receiver operating characteristic (ROC) curve and calculating the Youden index to determine the cutoff value of EBV-DNA load and its duration of diagnostic significance for PTLD. Results: A total of 94 patients were included, of whom 20 (21.3% ) developed PTLD, with a median onset time of 56 (40-309) d after transplantation. The median EBV value at the time of diagnosis of PTLD was 70,400 (1,710-1,370,000) copies/ml, and the median duration of EBV viremia was 23.5 (4-490) d. Binary logistic regression was used to analyze the peak EBV-DNA load (the EBV-DNA load at the time of diagnosis in the PTLD group) and duration of EBV viremia between the PTLD and non-PTLD groups. The results showed that the difference between the two groups was statistically significant (P=0.018 and P=0.001) . The ROC curve was constructed to calculate the Youden index, and it was concluded that the EBV-DNA load ≥ 41 850 copies/ml after allogeneic hematopoietic stem cell transplantation had diagnostic significance for PTLD (AUC=0.847) , and the sensitivity and specificity were 0.611 and 0.932, respectively. The duration of EBV viremia of ≥20.5 d had diagnostic significance for PTLD (AUC=0.833) , with a sensitivity and specificity of 0.778 and 0.795, respectively. Conclusion: Dynamic monitoring of EBV load in high-risk patients with PTLD after haplo-HSCT and attention to its duration have important clinical significance, which can help clinically predict the occurrence of PTLD in advance and take early intervention measures.


Subject(s)
Humans , Epstein-Barr Virus Infections/diagnosis , Herpesvirus 4, Human/genetics , Retrospective Studies , Viremia , Hematopoietic Stem Cell Transplantation/adverse effects , Lymphoproliferative Disorders/etiology , DNA, Viral , Viral Load
7.
Arq. ciências saúde UNIPAR ; 26(3): 470-785, set-dez. 2022.
Article in Portuguese | LILACS | ID: biblio-1399132

ABSTRACT

: O estado do Pará, de 2009 a 2019, apresentou um aumento de 46,5% na taxa de detecção de aids. O que destaca a importância de estudos para a avaliação e acompanhamento deste público. Objetivo: Analisar as infecções que acometem os usuários de um centro de referência no momento de seu diagnóstico para a infecção pelo HIV. Métodos: Estudo descritivo, realizado em um centro de referência da cidade de Santarém, Pará. A amostra foi de 332 prontuários de pacientes diagnosticados para o HIV nos anos de 2016 e 2017. A coleta de dados buscou informações sociodemográficas, clínicas e imunológicas dos pacientes no momento do diagnóstico para a infecção pelo HIV. Os dados foram organizados e analisados por estatística descritiva e inferencial, adotando- se p<0,05. Resultados: Observou-se prevalência do sexo masculino (67%), faixa etária de 15-24 anos (32,2%), solteiros (59%), com vínculo empregatício (64,5%), contagem de linfócitos T CD4+ ≥200 céls/mm3 (54,8%) e carga viral detectável (75,3%). A Candidíase (25%) e a Tuberculose (25%) predominaram como infecções oportunistas (IO), e a Sífilis (67,5%) como outras infecções. Conclusão: Conforme método proposto e os dados já informados, conclui-se que o diagnóstico para a Sífilis se associou ao sexo masculino, bem como a situação de contagem de linfócitos T CD4+ <200 céls/mm3 se associou com a presença de alguma infecção oportunista, da instalação da Candidíase e da Tuberculose.


Introduction: The state of Pará, from 2009 to 2019, showed a 46.5% increase in the AIDS detection rate. What stands out the importance of studies for the evaluation and monitoring of this public. Objective: Analyze the infections that affect the users of a reference center at the moment of diagnosis for HIV infection. Methods: Descriptive study, carried out in a reference center in the city of Santarém, Pará. The sample consisted of 332 records of patients diagnosed with HIV in the years 2016 and 2017. The data collection sought sociodemographic, clinical and immunological information of the patients at the moment diagnosis for HIV infection. The data were organized and analyzed using descriptive and inferential statistics, adopting p <0.05. Results: There was a prevalence of males (67%), aged 15-24 years (32.2%), single (59%), with employment (64.5%), CD4 + T lymphocyte count ≥200 cells/mm3 (54.8%) and detectable viral load (75.3%). Candidiasis (25%) and Tuberculosis (25%) predominated as opportunistic infections (IO), and Syphilis (67.5%) as other infections. Conclusion: According to the proposed method and the data already reported, it is concluded that the diagnosis for Syphilis was associated with the male gender, as well as the situation of CD4 + T lymphocyte count <200 cells/mm3 was associated with the presence of some opportunistic infection, of the installation of Candidiasis and Tuberculosis.


Introducción: El estado de Pará, de 2009 a 2019, presentó un aumento del 46,5% en la tasa de detección del SIDA. Lo que pone de manifiesto la importancia de los estudios para la evaluación y el seguimiento de este público. Objetivo: Analizar las infecciones que sufren los usuarios de un centro de referencia en el momento de su diagnóstico de infección por VIH. Métodos: Estudo descritivo, realizado em um centro de referência da cidade de Santarém, Pará. La muestra fue de 332 historias clínicas de pacientes diagnosticados de VIH en los años 2016 y 2017. La recogida de datos buscaba información sociodemográfica, clínica e inmunológica de los pacientes en el momento del diagnóstico de la infección por VIH. Los datos se organizaron y analizaron mediante estadísticas descriptivas e inferenciales, adoptando p<0,05. Resultados: Se observó la prevalencia del sexo masculino (67%), el grupo de edad de 15 a 24 años (32,2%), la soltería (59%), el empleo (64,5%), el recuento de linfocitos T CD4+ ≥200 células/mm3 (54,8%) y la carga viral detectable (75,3%). La candidiasis (25%) y la tuberculosis (25%) predominaron como infecciones oportunistas (IO), y la sífilis (67,5%) como otras infecciones. Conclusión: De acuerdo con el método propuesto y los datos ya informados, se concluye que el diagnóstico de Sífilis se asocia al sexo masculino, así como la situación de contagio de linfocitos T CD4+ <200 células/mm3 se asocia a la presencia de alguna infección oportunista, a la instauración de la Candidiasis y a la Tuberculosis.


Subject(s)
Male , Female , Adolescent , Adult , Middle Aged , Aged , Health Profile , HIV Infections/epidemiology , Acquired Immunodeficiency Syndrome/diagnosis , Acquired Immunodeficiency Syndrome/epidemiology , Tuberculosis , Opportunistic Infections/epidemiology , Candidiasis/complications , T-Lymphocytes , Syphilis , Medical Records/statistics & numerical data , Viral Load/statistics & numerical data , Sociodemographic Factors
8.
Rev. peru. med. exp. salud publica ; 39(3): 352-356, jul.-sep. 2022. tab
Article in Spanish | LILACS | ID: biblio-1410012

ABSTRACT

RESUMEN El sarcoma de Kaposi (SK) es el cáncer más frecuente en las personas que viven con VIH. Las investigaciones sobre esta condición son escasas en la región, por lo que, el objetivo de este artículo fue describir las características demográficas, clínicas y terapéuticas de los pacientes con VIH que desarrollaron SK en el Hospital Cayetano Heredia entre el 2000 y 2018. Se identificaron 129 casos de SK, con una mediana de edad de 33 años, con predominio en varones con el 92% (119/129), y en su mayoría hombres que tienen sexo con hombres (HSH). La mediana de tiempo desde el diagnóstico de VIH hasta el del SK fue de cinco meses, asociado con un recuento de linfocitos CD4 de 64 células/µL (RIC: 33-185) al momento del diagnóstico de SK. El compromiso cutáneo fue el más común; sin embargo, al menos la mitad de ellos también tuvo la forma visceral.


ABSTRACT Kaposi's sarcoma (KS) is the most frequent cancer in people living with HIV. Research on this condition is scarce in the region, therefore, this article aimed to describe the demographic, clinical and therapeutic characteristics of patients with HIV who developed KS at the Cayetano Heredia Hospital between 2000 and 2018. A total of 129 KS cases were identified, with a median age of 33 years, predominantly males with 92% (119/129), and mostly men who have sex with men (MSM). The median time from HIV diagnosis to KS diagnosis was five months, associated with a CD4 lymphocyte count of 64 cells/μL (IQR: 33-185) at KS diagnosis. Cutaneous involvement was the most common presentation; however, at least half also had the visceral form.


Subject(s)
Humans , Male , Female , Adult , Sarcoma, Kaposi/epidemiology , AIDS-Related Opportunistic Infections/epidemiology , Peru/epidemiology , Sarcoma, Kaposi/virology , Cohort Studies , AIDS-Related Opportunistic Infections/virology , CD4 Lymphocyte Count , Viral Load , Age and Sex Distribution
9.
Arq. ciências saúde UNIPAR ; 26(2): 187-192, maio-ago. 2022.
Article in Portuguese | LILACS | ID: biblio-1372977

ABSTRACT

O vírus da imunodeficiência humana é o agente etiológico da AIDS, doença crônica que destrói o sistema imunológico e é caracterizada pela baixa contagem de células TCD4, alta contagem de partículas virais no sangue e manifestações clínicas da doença. O diagnóstico se dá com o aparecimento de infecções oportunistas, que levam a contagem de TCD4 a níveis menores que 200 céls/mm³. Os exames laboratoriais para o diagnóstico do HIV foram os principais avanços para o início do tratamento, reduzindo a transmissão. Detecção de anticorpos, detecção de antígenos e amplificação do genoma do vírus são alguns dos exames laboratoriais utilizados para diagnóstico. Os dois principais biomarcadores são os exames de contagem de células TCD4, que verifica o sistema imune, e a quantificação de carga viral, que informa a quantidade de partículas virais, mostrando a progressão da infecção. Quanto maior a carga viral, maior o dano ao sistema imune. Uma carga viral indetectável é inferior a 50 cópias/mL, mas valores menores ou iguais a 200 cópias/mL também impedem a transmissão. Uma declaração de consenso afirma que Indetectável é igual a Intransmissível. Portanto, quando indetectável, a transmissão inexiste. O presente estudo relata e discute o caso clínico de uma paciente diagnosticada com HIV/AIDS aos 28 anos, que sobreviveu, apesar do diagnóstico tardio, e sob presença de doença oportunista com um grave grau de diminuição de células TCD4 (22 cél/mm³). Por meio do diagnóstico, introdução e adesão correta da terapia antirretroviral e monitorização de exames laboratoriais, conseguiu evitar a morte e ter uma vida semelhante à de um HIV negativo. Ultrapassou a expectativa de vida que na descoberta era de 10 anos, com uma qualidade de vida considerável, não sendo transmissora do vírus, diminuindo assim o estigma e preconceito. O biomédico é peça fundamental nesse contexto, considerando que deve fornecer informações precisas e fidedignas, tão necessárias ao acompanhamento de pessoas vivendo com HIV, para que autoridades e profissionais de saúde adotem medidas adequadas, tanto na prevenção, quanto no diagnóstico e monitoramento da doença.


The human immunodeficiency virus is the etiological agent of AIDS, a chronic disease that destroys the immune system and is characterized by low TCD4 cell count, high viral particle count in blood and clinical manifestations of the disease. The diagnosis is due to the appearance of opportunistic infections, which lead to TCD4 counts below 200 cells / mm³. Laboratory tests for the diagnosis of HIV were the main advances in starting treatment, reducing transmission. Antibody detection, antigen detection and virus genome amplification are some of the laboratory tests used for diagnosis. The two main biomarkers are the TCD4 cell count tests, which checks the immune system, and viral load quantification, which reports the number of viral particles, showing the progression of infection. The higher the viral load, the greater the damage to the immune system. An undetectable viral load is less than 50 copies / mL, but values less than or equal to 200 copies / mL also prevent transmission. A consensus statement states that Undetectable equals Non-Transmissible. Therefore, when undetectable, transmission does not exist. The present study reports and discusses the clinical case of a patient diagnosed with HIV / AIDS at age 28, who survived despite late diagnosis and under the presence of opportunistic disease with a severe degree of TCD4 cell reduction (22 cells / mm³). Through the diagnosis, introduction and correct adherence of antiretroviral therapy and monitoring of laboratory tests, she was able to avoid death and have a life similar to that of an HIV negative. Exceeded the life expectancy that in the discovery was 10 years, with a considerable quality of life, not transmitting the virus, thus reducing the stigma and prejudice. The biomedical is a key player in this context, considering that he must provide accurate and reliable information, which is so necessary for the monitoring of people living with HIV, so that authorities and health professionals adopt appropriate measures, both in prevention, diagnosis and monitoring of the disease.


Subject(s)
Humans , Female , Adult , HIV Infections/drug therapy , HIV , Toxoplasmosis/virology , AIDS-Associated Nephropathy/virology , Acquired Immunodeficiency Syndrome , AIDS-Related Opportunistic Infections , Viral Load , Cryptococcosis/drug therapy , Antiretroviral Therapy, Highly Active , Fever/virology , Headache/virology , Anemia/virology , Meningitis/virology
10.
Acta sci., Health sci ; 44: e56764, Jan. 14, 2022.
Article in English | LILACS | ID: biblio-1367790

ABSTRACT

The aim of this study was to investigate possible factors related to antiretroviral therapy (ART) that contribute to the understanding of the highest rate of Aids detection on the coast of the state of Paraná, a port region identified administratively as the 1stRegional Health Division (1stHD) in the state of Paraná. Data on the sociodemographic profile of the population undergoing antiretroviral treatment (ART), medication changes, dropout of therapy, proportion of the population undergoing treatment and viral load were obtained through computerized systems. Between July 1, 2018 and June 31, 2019, 1,393 people were on ART in the 1stRS. Of these, 57.6% were male. During this period, 110 people started ART with a predominance of the age group between 30 and 39 years old. ART was switched for169 people and 211 patient dropouts were detected. The proportion of people diagnosed with HIV without treatment (gap) is still high, however 92.7% people on ART have suppressed viral load. It can be concluded that the lower educational level of the population undergoing treatment, the late diagnosis of those infected and the treatment gapprobably contribute to the highest rate of Aids detection in the 1stRS.


Subject(s)
Humans , Male , Female , Adolescent , Adult , Middle Aged , Acquired Immunodeficiency Syndrome/epidemiology , Pharmacoepidemiology/methods , Anti-Retroviral Agents/therapeutic use , Sociodemographic Factors , Brazil/epidemiology , Incidence , Acquired Immunodeficiency Syndrome/prevention & control , Acquired Immunodeficiency Syndrome/drug therapy , Health Strategies , Viral Load
11.
Rev. saúde pública (Online) ; 56: 1-10, 2022. tab, graf
Article in English | LILACS, BBO | ID: biblio-1377225

ABSTRACT

ABSTRACT OBJECTIVE Recognize incident infection to better characterize the groups that fuel HIV epidemic. We propose a simple score to identify recent infections among newly diagnosed patients as a HIV surveillance tool. METHODS Newly diagnosed patients were defined as recent infections when a negative serological test in the previous year was available. Laboratory tests, such as the avidity index (Bio-Rad, according to the CEPHIA protocol), chemiluminescent intensity (CMIA, architect, Abbott), and the nucleotide ambiguity index of partial pol sequences were used as proxies of recency. A simple score based on clinical symptoms of acute retroviral syndrome during the previous year, CD4+ T cell count, and viral load at admission was tested to assess the predictive power, using receiver operating characteristic (ROC) curves, to identify recent cases of infection. RESULTS We evaluated 204 recently diagnosed patients who were admitted to the Ambulatório de Referência em Moléstias Infecciosas de Santo André (Santo André Reference Infectious Diseases Outpatient Clinic), in the metropolitan region of São Paulo, Brazil, recruited between 2011 and 2018. An HIV-negative test in the year prior to enrollment was documented in 37% of participants. The proportion of cases classified as recent infections (less than one year), according to the laboratory proxies were: 37% (67/181) for an avidity index < 40%, 22% (30/137) for a CMIA < 200, and 68% (124/181) for an ambiguity index < 0.5%. Using different combinations of recency definitions, our score showed an area under the ROC curve from 0.66 to 0.87 to predict recency. CONCLUSIONS Using data from patients' interviews and routine laboratory tests at admission, a simple score may provide information on HIV recency and thus, a proxy for HIV incidence to guide public policies. This simple for the Brazilian public health system and other low- and middle-income countries.


Subject(s)
Humans , HIV Infections/diagnosis , HIV Infections/epidemiology , Brazil/epidemiology , Incidence , CD4 Lymphocyte Count , Viral Load
12.
BioSC. (Curitiba, Impresso) ; 80(Supl.1): 2-4, 20220000.
Article in Portuguese | LILACS | ID: biblio-1417613

ABSTRACT

Em razão da implantação da cascata de cuidado contínuo do HIV/AIDS, o estado do Paraná apresentou um declínio do número de casos de AIDS a partir do ano de 2012. Entretanto, na 1ª Regional de Paranaguá concentram-se as maiores taxas de incidência de casos de HIV no ano de 2014, além de possuir também o maior coeficiente de mortalidade por AIDS. Objetivos: Investigar a evolução de alguns parâmetros da cascata de cuidado das pessoas com HIV no município de Paranaguá, no Paraná. Método: Estudo observacional, descritivo, retrospectivo e de caráter quantitativo, realizado com dados secundários sobre indicadores clínicos de HIV/AIDS fornecidos pela Secretaria de Vigilância em Saúde do Ministério da Saúde, no período de 2015 a 2021. Resultados: Obteve-se uma redução progressiva da detecção de AIDS no município de Paranaguá. Entretanto, ainda com as maiores taxas de detecção do estado, além de uma proporção de pessoas com carga viral suprimida abaixo dos 90% propostos como meta pela Organização Mundial da Saúde. Conclusão: Reforça-se a necessidade de persistir e intensificar as ações voltadas ao diagnóstico, vinculação e tratamento correto das pessoas com HIV nos serviços de saúde de Paranaguá


Due to the implementation of the HIV/AIDS continuous care cascade, the state of Paraná showed a decline in the number of AIDS cases from the year 2012. However, the 1st Regional of Paranaguá concentrates the highest rates of infection cases in 2014, in addition to having the highest AIDS mortality rate. Objective: To investigate the evolution of some parameters of the cascade of care for people with HIV in the municipality of Paranaguá, Paraná.Methods: Observational, descriptive, retrospective and quantitative study, carried out with secondary data on clinical indicators of HIV/AIDS provided by the Health Surveillance Department of the Ministry of Health, from 2015 to 2021. Results: There was a progressive reduction in the detection of AIDS in the city of Paranaguá. However, still with the highest detection rates in the state, in addition to a proportion of people with suppressed viral load below the 90% proposed as a goal by the World Health Organization. Conclusion: The need to persist and intensify actions aimed at diagnosis, linking and correct treatment of people with HIV in the health services of Paranaguá is reinforced


Subject(s)
Humans , Acquired Immunodeficiency Syndrome , Viral Load , Anti-Retroviral Agents , Antiretroviral Therapy, Highly Active
13.
S. Afr. med. j ; 112(2): 96-101, 2022.
Article in English | AIM | ID: biblio-1358378

ABSTRACT

Background. Better integration of HIV and sexually transmitted infection (STI) prevention and treatment services is needed to accelerate progress towards the goal of zero new HIV infections. Objectives. To describe HIV positivity, antiretroviral therapy (ART) use, viral suppression and recency of HIV infection among symptomatic STI service attendees at two primary care clinics in South Africa. Methods. In a cross-sectional study, male and female STI service attendees presenting with symptoms consistent with STI syndromes were enrolled following informed consent. An interviewer-administered questionnaire was completed and appropriate genital and blood specimens were collected for STI testing and HIV biomarker measurements including recency of infection and antiretroviral (ARV) drug levels. Descriptive statistics were used to describe enrolled attendees, and to determine the proportion of attendees who were HIV-positive, recently infected, taking ART and virally suppressed. HIV-positive attendees with detectable ARVs were considered to be on ART, while those with viral loads (VLs) ≤200 copies/mL were considered virally suppressed. Results. Of 451 symptomatic attendees whose data were analysed, 93 (20.6%) were HIV-positive, with 15/93 (16.1%) being recently infected. Recent infection was independently associated with genital ulcer disease at presentation, especially ulcers with no detectable STI pathogens. Among the 78 (83.9%) with long-term infection, only 30 (38.5%) were on ART, with 23/30 (76.7%) virally suppressed. Conclusions. In a population at risk of HIV transmission, there was a high burden of recent infection and unsuppressed VLs. Incorporating pre-exposure prophylaxis, ART initiation and adherence support into STI services will be necessary for progress towards eliminating HIV transmission


Subject(s)
HIV Infections , Viral Load , Sexually Transmitted Diseases , HIV Seropositivity
14.
Chinese Journal of Epidemiology ; (12): 692-695, 2022.
Article in Chinese | WPRIM | ID: wpr-935445

ABSTRACT

Objective: To analyze the dynamic changes and influencing factors of HIV-1 DNA load in HIV-1 infected individuals under antiretroviral therapy (ART) in Dehong Dai and Jingpo autonomous prefecture, Yunnan province, and provide information support for the clinical use of HIV-1 DNA quantitative detection. Methods: The HIV infection cases in recent infection cohort from Dehong Center for Disease Control and Prevention during 2009-2018 were selected as study subjects. The dynamic curve of HIV-1 DNA load varrying with time was generated and logistic regression analysis was conducted to identify the risk factors for HIV-1 load in the recent follow up after ART and statistical analysis was performed by using SPSS 17.0. Results: Among the 113 HIV infection cases detected from the recent infection cohort, the recent HIV infection rate were 49.6%(56/113) males, sexual transmission cases and drug injection transmission cases accounted for 53.1% (60/113), 80.5% (91/113) and 19.5% (22/113), respectively. The dynamic changes curve showed that HIV-1 DNA load was relatively high (>800 copies /106 PBMCs) before ART, and droped rapidly (<400 copies /106 PBMCs) after ART for 1 year. However, HIV-1 DNA load decreased insignificantly from the second year of ART, and remained to be 269 copies/106 PBMCs after ART for 6 years. Univariable logistic regression analysis indicated that OR (95%CI) of CD8, CD4/CD8 and HIV-1 DNA load were 1.00 (1.00-1.00), 0.30 (0.09-1.05) and 1.01 (1.00-1.01), respectively. Multivariable logistic regression analysis showed that OR value of HIV-1 DNA load base was 1.00 (1.00-1.01). Conclusions: HIV-1 DNA load decreased significantly in the first year of ART, then remained stable for years. HIV-1 DNA load base was the key factor associated with the decrease of HIV-1 DNA load, the lower the HIV-1 DNA load base, the lower HIV-1 DNA load. Therefore, earlier ART can contribute to the decrease of HIV-1 DNA load.


Subject(s)
Humans , Male , China/epidemiology , DNA/therapeutic use , HIV Infections/drug therapy , HIV Seropositivity , HIV-1/genetics , Viral Load
16.
South. Afr. j. HIV med. (Online) ; 23(1): 1-9, 2022. tales, figures
Article in English | AIM | ID: biblio-1402438

ABSTRACT

Background: Only 66% of South African people living with HIV (PLWH) are virologically suppressed. Therefore, it is important to develop strategies to improve outcomes.Objectives: Assess the effect of interventions on 12-month retention in care and virological suppression in participants newly initiated on antiretroviral therapy.Method: Fifty-seven clinics were randomised into four arms: Ward-based primary health care outreach teams (WBPHCOTs); Game; WBPHCOT­Game in combination; and Control (standard of care). Sixteen clinics were excluded and four re-allocated because lay counsellors and operational team leaders failed to attend the required training. Seventeen clinics were excluded due to non-enrolment. Results: A total of 558 participants from Tshwane district were enrolled. After excluding ineligible participants, 467 participants were included in the analysis: WBPHCOTs (n = 72); Games (n = 126); WBPHCOT­Games (n = 85); and Control (n = 184). Retention in care at 12 months was evaluable in 340 participants (86.2%) were retained in care and 13.8% were lost to follow-up. The intervention groups had higher retention in care than the Control group, but this only reached statistical significance in the Games group (96.8% vs 77.8%; relative risk [RR] 1.25; 95% confidence interval [CI]: 1.13­1.38; P = 0.01). The 12 month virologic suppression rate was 75.3% and was similar across the four arms.Conclusion: This study demonstrated that an adherence game intervention could help keep PLWH in care.What this study adds: Evidence that interventions, especially Games, could improve retention in care


Subject(s)
Humans , Acquired Immunodeficiency Syndrome , Retention in Care , Suppression , HIV , Community Health Workers , Viral Load
17.
South. Afr. j. HIV med. (Online) ; 23(1): 2-7, 2022. tales, figures
Article in English | AIM | ID: biblio-1402449

ABSTRACT

Background: The coronavirus disease 2019 (COVID-19) pandemic poses challenges to paediatric and adolescent HIV treatment programme. Modelling exercises raised concerns over potential impact of disruptions. Objectives: To describe the impact of the COVID-19 pandemic on viral load (VL) testing among infants, children and adolescents on antiretroviral treatment (ART) in Durban, South Africa. Method: Routinely collected, aggregated data of monthly VL counts done on all those less than 19 years old from January 2018 to January 2022 was analysed. An interrupted time series analysis using a Prais-Winsten linear regression model, including terms for lockdowns and excess mortality determined VL trends. Results: The unadjusted mean VL was 2166 (confidence interval [CI]: 252.2) and 2016 (CI: 241.9), P = 0.039, and percentage VL suppression rates (72.9%, CI: 2.4% vs 73.6%, CI: 1.8%) across COVID and pre-COVID periods, showing no significant difference, P = 0.262. In the interrupted time series analysis, modelled monthly VL counts did not differ significantly by lockdown level (e.g., level 5 lockdown: ­210.5 VLs, 95% CI: ­483.0 to +62.1, P = 0.138) or excess mortality (­0.1, 95% CI: ­6.3 to 6.1, P = 0.969). A significant downward trend in VL testing over time, including during the pre-COVID-19 period (­6.6 VL per month, 95% CI: ­10.4 to ­2.7, P = 0.002), was identified. Conclusion: Viral load suppression for children and adolescents were not negatively affected by COVID-19. A trend of decrease in VL testing predated COVID-19. What this study adds: Evidence presented that HIV VL testing and suppression rates in children and adolescents in a high burden setting were sustained through the COVID pandemic.


Subject(s)
Humans , HIV , COVID-19 , Child Health , Viral Load , HIV Testing , Integrative Pediatrics
18.
Infectio ; 25(4): 276-283, oct.-dic. 2021. tab, graf
Article in Spanish | LILACS, COLNAL | ID: biblio-1286722

ABSTRACT

Resumen Objetivo: Describir la supervivencia a siete años y los principales factores asociados a esta, en las personas con VIH que fueron atendidas en el sistema de salud colombiano entre 2011 a 2018. Métodos: Análisis de supervivencia de una cohorte de 64 039 personas diagnosticadas con VIH en Colombia. Se aplicó el método de Kaplan-Meier para estimar la probabilidad de supervivencia a partir de la fecha del diagnóstico. Se ajustó un modelo de supervivencia paramétrico flexible de Royston Parmar. Resultados: La estimación de la supervivencia global a 7 años fue de 94,8% (IC 95%: 94,5-95,2). El mayor riesgo de muerte se presentó en los hombres (HR: 1,2; IC 95%: 1,1-1,4; p: 0,010); en personas ≥50 años de edad (HR: 3,1; IC 95%: 1,6-6,3; p: 0,002); en el régimen subsidiado (HR: 2,2; IC 95%: 1,9-2,5; p: <0,001); en la etapa sida (HR: 2,8; IC 95%: 2,1-3,7; p: <0,001); en quienes presentaron la última carga viral detectable (HR: 7,1; IC 95%: 6,0-8,3; p: <0,001); y en quienes mostraron conteo de linfocitos T CD4+ <350 células/μL (HR: 1,9; IC 95%: 1,4-2,4; p: <0,001). Conclusión: La probabilidad de la supervivencia de las personas que viven con VIH aumenta al ser diagnosticados en edades jóvenes, en quienes presenten un recuento de linfocitos T CD4+ ≥350 células/μL, una carga viral indetectable (< 50 copias/mL) y no se encuentren en etapa sida.


Summary Objective: to describe the seven-year survival and predictors of mortality among people with HIV who were treated in the Colombian health system between 2011 and 2018. Methods: 64 039 people diagnosed with HIV in Colombia were included. Kaplan-Meier analysis estimated the probability of survival from the date of diagnosis. A Royston Parmar flexible parametric survival model was fitted. Results: The overall survival at 7 years was 94.8% (95% CI: 94.5-95.2). Survival was related to sex (men, HR: 1.2; 95% CI: 1.1-1.4; p: 0.010); people ≥50 years of age (HR: 3.1; 95% CI: 1.6-6.3; p: 0.002); subsidized regime (HR: 2.2; 95% CI: 1.9-2.5; p: <0.001); AIDS stage (HR: 2.8; 95% CI: 2.1-3.7; p: <0.001); a detectable viral load (HR: 7.1; 95% CI: 6.0-8.3; p: <0.001); and a CD4+ Lymphocyte count <350 cells/μL (HR: 1.9; 95% CI: 1.4-2.4; p: <0.001). Conclusion: The probability of survival of people living with HIV increases when they are diagnosed at a young age, in those with a CD4+ T Lymphocyte count ≥350 cells/μL, an undetectable viral load (<50 copies/mL) and are not in the AIDS stage.


Subject(s)
Humans , Male , Female , Adolescent , Adult , Middle Aged , Survival Analysis , Acquired Immunodeficiency Syndrome , Sex , T-Lymphocytes , Probability , HIV , Colombia , Lymphocyte Count , Viral Load , Survivorship
19.
J. bras. nefrol ; 43(4): 530-538, Dec. 2021. tab, graf
Article in English, Portuguese | LILACS | ID: biblio-1350900

ABSTRACT

Abstract Introduction: Cytomegalovirus (CMV) is one of the most common agents of infection in solid organ transplant patients, with significant morbidity and mortality. Objective: This study aimed to establish a threshold for initiation of preemptive treatment. In addition, the study compared the performance of antigenemia with qPCR results. Study design: This was a prospective cohort study conducted in 2017 in a single kidney transplant center in Brazil. Clinical validation was performed by comparing in-house qPCR results, against standard of care at that time (Pp65 CMV Antigenemia). ROC curve analysis was performed to determine the ideal threshold for initiation of preemptive therapy based on the qPCR test results. Results: Two hundred and thirty two samples from 30 patients were tested with both antigenemia and qPCR, from which 163 (70.26%) were concordant (Kappa coefficient: 0.435, p<0.001; Spearman correlation: 0.663). PCR allowed for early diagnoses. The median number of days for the first positive result was 50 (range, 24-105) for antigenemia and 42 (range, 24-74) for qPCR (p<0.001). ROC curve analysis revealed that at a threshold of 3,430 IU/mL (Log 3.54), qPCR had a sensitivity of 97.06% and a specificity of 74.24% (AUC 0.92617 ± 0.0185, p<0.001), in the prediction of 10 cells/105 leukocytes by antigenemia and physician's decision to treat. Conclusions: CMV Pp65 antigenemia and CMV qPCR showed fair agreement and a moderate correlation in this study. The in-house qPCR was revealed to be an accurate method to determine CMV DNAemia in kidney transplant patients, resulting in positive results weeks before antigenemia.


Resumo Introdução: Citomegalovírus (CMV) é um dos agentes infecciosos mais comuns em pacientes com transplante de órgãos sólidos, com morbidade e mortalidade significativas. Objetivo: Este estudo visou estabelecer um limite para o início do tratamento preemptivo. Além disso, comparou o desempenho da antigenemia com os resultados da qPCR in house. Desenho do estudo: Este foi um estudo de coorte prospectivo realizado em 2017 em um centro único de transplante renal no Brasil. A validação clínica foi realizada comparando resultados de qPCR in house, com o padrão de atendimento na época (Antigenemia para CMV Pp65). A análise da curva ROC foi realizada para determinar o limite ideal para o início da terapia preemptiva baseado nos resultados do teste qPCR in house. Resultados: 232 amostras de 30 pacientes foram testadas com antigenemia e qPCR, das quais 163 (70,26%) foram concordantes (Coeficiente Kappa: 0,435, p<0,001; Correlação Spearman: 0,663). PCR permitiu diagnósticos precoces. O número médio de dias para o primeiro resultado positivo foi 50 (intervalo, 24-105) para antigenemia e 42 (intervalo, 24-74) para qPCR (p<0,001). A análise da curva ROC revelou que em um limite de 3.430 UI/mL (Log 3,54), qPCR teve sensibilidade de 97,06% e especificidade de 74,24% (AUC 0,92617 ± 0,0185, p<0,001), na previsão de 10 células/10(5) leucócitos por antigenemia e na decisão do médico de tratar. Conclusões: Antigenemia para CMV Pp65 e qPCR para CMV mostraram uma concordância aceitável e uma correlação moderada neste estudo. qPCR in house revelou-se um método preciso para determinar DNAemia do CMV em pacientes transplantados renais, obtendo resultados positivos semanas antes da antigenemia.


Subject(s)
Humans , Kidney Transplantation , Cytomegalovirus Infections/diagnosis , World Health Organization , DNA, Viral , Prospective Studies , Viral Load , Real-Time Polymerase Chain Reaction , Antigens, Viral
20.
Acta bioquím. clín. latinoam ; 55(4): 490-500, dic. 2021. graf
Article in Spanish | LILACS, BINACIS | ID: biblio-1393753

ABSTRACT

Resumen La detección de SARS-CoV-2 y su implicancia en el diagnóstico de COVID-19 han sido muy debatidas en la pandemia. El objetivo de este estudio fue evaluar el costo/beneficio de la detección de SARS-CoV-2 en contactos estrechos asintomáticos (CE) mediante el uso de distintas pruebas de diagnóstico molecular. Se estudiaron 51 CE de personas con diagnóstico de SARS-CoV-2 confirmado por RTqPCR, clasificadas por el umbral de ciclos (Ct) (<20, entre 20 y 30 y >30) en hospitales públicos de la provincia de Buenos Aires. Del total de contactos estudiados el 15,7% resultó confirmado para SARS-CoV-2; no hubo contactos positivos de casos con Ct>30. La cantidad de contactos positivos de casos con Ct<20 fue significativamente mayor que la de casos con Ct>20. Las muestras con Ct<20 se asociaron a una carga viral estimada de entre uno a cuatro órdenes de magnitud de diferencia con los rangos de Ct>20. Un 13,7% de contactos positivos fueron casos con Ct<20. De las muestras positivas confirmadas por PCR, correspondientes a la semana epidemiológica 1 de 2021 (SE1), sólo un 19,35% correspondían a muestras con Ct<20 y un 50,7% con Ct entre 20 y 30. Estos datos muestran un incremento de sólo un 3,7% de casos detectados. El esfuerzo por parte del sistema de salud pública para esta estrategia, con bajo poder predictivo, puede tener un efecto negativo para el cumplimiento del aislamiento de los contactos y podría generar una demora en los resultados de los casos sospechosos, sin aportar significativamente en el control de la pandemia.


Abstract The detection of SARS-CoV-2 and its implication in the diagnosis of COVID-19 have been highly debated in the pandemic. The objective of this study was to evaluate the cost/benefit of detecting SARS-CoV-2 in asymptomatic close contacts (CC) using different molecular diagnostic tests. A total of 51 CC of people with a diagnosis of SARS-CoV-2 confirmed by RTqPCR, classified by the cycle threshold (Ct) (<20, between 20 and 30 and >30), were studied in public hospitals in the Province of Buenos Aires. Of the total contacts studied, 15.7% were confirmed for SARS-CoV-2; there were no positive contacts of cases with Ct>30 positive. The number of positive contacts of cases with Ct<20 was significantly higher than that of cases with Ct>20. Samples with Ct<20 were associated with an estimated viral load of one to four orders of magnitude difference with Ct ranges >20. A total of 13.7% of positive close contacts were from cases with Ct<20. When studying positive samples with confirmed diagnosis by PCR, corresponding to 1 epidemiological week of 2021 (EW1), only 19.35% corresponded to samples with Ct<20 and 50.7% with Ct between 20 and 30. From these data it is shown that with the CC test only 3.7% of the cases were detected. The effort by the public health system for this strategy, with low predictive power, may have a negative effect on the fulfillment of the isolation of contacts and could generate a delay in the results of suspected cases, without contributing significantly to controlling the pandemic.


Resumo A detecção do SARS-CoV-2 e seu envolvimento no diagnóstico da COVID-19 têm sido muito discutidos durante a pandemia. O objetivo desse estudo foi avaliar a relação custo/benefício na detecção de SARSCoV- 2 em casos de contatos próximos assintomático (CP), por meio do uso de diferentes testes de diagnóstico molecular. Foram estudados 51 casos de CP de pessoas com diagnóstico de SARS-CoV-2 confirmado pelo RTqPCR, sendo classificados pelo limiar de ciclos (Ct) (<20, entre 20 e 30 e >30), em hospitais públicos da província de Buenos Aires. Do total de contatos estudados, 15,7% foram confirmados para SARS-CoV-2, não houve contatos positivos de casos com Ct>30. O número de contatos positivos de casos com Ct<20, foi significativamente maior que os casos com Ct>20. As amostras com Ct<20 foram associadas a uma carga viral estimada de uma a quatro ordens de magnitude de diferença com os intervalos de Ct>20. Dos casos positivos, 13,7% foram com Ct<20. Das amostras positivas confirmadas por PCR, correspondentes à semana epidemiológica 1 de 2021 (SE1), apenas 19,35% correspondiam a amostras com Ct>20 e 50,7% com Ct entre 20 e 30. Esses dados mostram incremento de apenas 3,7% de casos detectados. O esforço por parte do sistema de saúde pública para essa estratégia, com baixo poder preditivo, pode ter um efeito negativo no cumprimento do isolamento dos contatos e poderia gerar uma demora nos resultados dos casos suspeitos, sem contribuir significativamente para o controle da pandemia.


Subject(s)
Virology , SARS-CoV-2 , Patient Isolation , Salaries and Fringe Benefits , Health Systems , Power, Psychological , Carrier State , Polymerase Chain Reaction , Public Health , Viral Load , Diagnostic Techniques and Procedures , Costs and Cost Analysis , Richter Scale , Molecular Diagnostic Techniques , Diagnosis , Pathology, Molecular , Pandemics , Procrastination , COVID-19 , Hospitals, Public , Persons
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