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1.
Rev. chil. infectol ; 38(1): 61-68, feb. 2021. ilus, tab
Article in Spanish | LILACS | ID: biblio-1388208

ABSTRACT

INTRODUCCIÓN: Tuberculosis (TBC) sigue siendo la segunda causa de muerte por una enfermedad infecto-contagiosa después del síndrome de inmunodeficiencia humana adquirida (SIDA). Actualmente, el escenario de técnicas y metodologías de laboratorio para la identificación y drogo-sensibilidad está cambiando gradualmente. Se han recomendado e introducido ensayos rápidos basados en la amplificación de ácidos nucleicos (NAAT's) que se desarrollan mediante la reacción de polimerasa en cadena (RPC). Bajo este principio, se destaca spoligotyping -una herramienta de genotipificación y epidemiología molecular en TBC- estandarizada a partir de aislados bacterianos, que permite el estudio del genoma de Mycobacterium mediante la amplificación de 43 secuencias cortas no repetitivas, localizadas en la región de repetición directa (RD1). OBJETIVO: Evaluación de spoligotyping a partir de baciloscopías, como una opción independiente de cultivo, para la caracterización de Mycobacterium tuberculosis a partir de muestras de esputo en pacientes del Instituto Nacional Cardiopulmonar de Tegucigalpa, Honduras. MÉTODO: De 37 pacientes con cultivo (y baciloscopía) positivos para M. tuberculosis, se obtuvieron 50 muestras de expectoración. Se realizó estudio microbiológico y molecular en muestras respiratorias conteniendo ADN de micobacterias, a partir de baciloscopías, concentrados y cultivo, para la identificación y análisis genotípico a través de la técnica de spoligotyping. RESULTADOS: El spoligotyping fue positivo en 37/37 de muestras de cultivo positivo (S: 100%), en 36/37 (S: 97,3%) de muestras con baciloscopía positiva y en 6/10 (S: 60%) de muestras de concentrado de esputo. La intensidad de la baciloscopía positiva tuvo una relación directa con la sensibilidad de spoligotyping. DISCUSIÓN: El fusionar el potencial de una herramienta útil en epidemiología molecular para analizar muestras de ADN proveniente de baciloscopías, visualiza una plataforma diagnóstica y genotípica para países en vías de desarrollo como una alternativa innovadora y altamente sensible en la hibridación de oligonucleótidos específicos a partir material genético en baciloscopías (P+, P++, P+++), pero requiere mejorar la concordancia entre patrones genéticos obtenidos, comparables con el uso estandarizado de aislados de cepas de M. tuberculosis.


BACKGROUND: Tuberculosis (TB) remains as the second cause of death by an infectious disease preceded by the acquired immune deficiency syndrome (AIDS). Currently, laboratory techniques and methodologies of diagnosis and drug susceptibility testing are constantly changing. Therefore, it has been recommended the introduction of rapid assays based on the amplification of nucleic acids test (NAAT's) through a polymerase chain reaction (PCR). Based on this principle, outstands spoligotyping - as a genotype and molecular epidemiology tool in tuberculosis - it is standardized to use isolated bacteria for the study of Mycobacterium genome through the amplification of 43 non-repetitive sequences, located at the direct repetitive region 1 (RD1). AIM Evaluation of spoligotyping from acid fast staining smears as an independent option from bacterial isolation to characterize Mycobacterium tuberculosis by using sputum samples from TB patients from National Cardiopulmonary Institute in Tegucigalpa, Honduras. METHOD: Of 37 patients with positive culture (and smear microscopy) for M. tuberculosis, 50 expectoration samples were obtained. Microbiological and molecular tests were performed in respiratory samples containing mycobacterial DNA from sputum smears, concentrates and solid culture, for identification and genotype analysis by spoligotyping technique. RESULTS: Spoligotyping was positive in 37/37 of positive culture samples (S: 100%), in 36/37 (S: 97.3%) of smear-positive samples and in 6/10 (S: 60%) of concentrate samples sputum. The intensity of positive smear microscopy had a direct relationship with the sensitivity of spoligotyping. DISCUSSION: This study combined the potential of a molecular epidemiology tool to analyse DNA from sputum samples in smears acid fast staining, it visualizes diagnosis and genotyping platform in developing countries gathering innovation and high sensitivity in the hibridization of specific olignonucleotides from positive smears (P+, P++, P+++). However, the low specificity showed the need to improve better agreement among genetic patterns compared to the standardized bacterial isolation from M. tuberculosis strains.


Subject(s)
Humans , Tuberculosis/diagnosis , Mycobacterium tuberculosis/genetics , Sputum , Microbial Sensitivity Tests , Sensitivity and Specificity , Genotype
2.
Rev. Méd. Clín. Condes ; 31(2): 174-182, mar.-abr. 2020. tab
Article in Spanish | LILACS | ID: biblio-1223625

ABSTRACT

La comorbilidad entre trastornos del ánimo (TA) y trastornos por uso de sustancias (TUS) es frecuente, empeora el pronóstico de ambos cuadros y dificulta su tratamiento. El reconocimiento y manejo de síntomas anímicos en usuarios de sustancias significa un desafío en la práctica clínica. Si bien existen los trastornos anímicos secundarios a la patología por consumo, la evidencia muestra que la mayor parte de las veces en que ambas patologías coexisten, el trastorno anímico es primario, por lo tanto, el uso de sustancias activo no debiese impedir un tratamiento oportuno del TA, sin descuidar el manejo específico del uso de sustancias, ya que el tratamiento del cuadro afectivo por sí sólo no resuelve el TUS. Existe acuerdo en la necesidad de realizar un tratamiento integrado de ambos trastornos, que incorpore intervenciones farmacológicas y psicoterapéuticas ya validadas para el tratamiento de ambos trastornos por separado, y especialmente aquellas que han mostrado efectividad en la comorbilidad. El tratamiento debe tener un enfoque en la recuperación, que promueva la adherencia y reinserción social. Se requiere mayor investigación sobre el pronóstico y el tratamiento de la comorbilidad entre Trastorno anímicos y por uso de sustancias, y el fortalecimiento de la red de salud general y salud mental en la pesquisa y manejo de estos cuadros.


Comorbidity between Mood Disorders (MD) and Substance Use Disorders (SUD) are common and it worsens the prognosis of both conditions. The recognition and management of mood symptoms in SUD patients is a usual challenge in clinical practice. As opposed to the usual belief, most mood disorders in TUS patients are primary disorders and therefore the use of active substances should not prevent timely treatment of MD, without neglecting the specific management of substance use, since that the treatment of the affective condition alone does not resolve your SUD. There is agreement on the need to perform an integrated treatment of both disorders, which incorporates pharmacological and psychotherapeutic interventions already validated for the treatment of both disorders, and especially those that have shown effectiveness in comorbidity. Treatment should have a focus on recovery, which promotes adherence and social reintegration. More research is required on the prognosis and treatment of comorbidity between mood and substance use disorders, and the strengthening of the general health and mental health network in the research and management of these conditions.


Subject(s)
Humans , Mood Disorders/epidemiology , Substance-Related Disorders/epidemiology , Diagnosis, Dual (Psychiatry) , Mood Disorders/diagnosis , Mood Disorders/therapy , Substance-Related Disorders/diagnosis , Substance-Related Disorders/therapy
3.
Rev. chil. radiol ; 24(2): 63-66, jul. 2018. ilus
Article in Spanish | LILACS | ID: biblio-959578

ABSTRACT

En la práctica radiológica habitual el radiólogo se encuentra frecuentemente con distintas técnicas de reconstrucción del LCA que debe conocer de manera general para una adecuada descripción e interpretación de los hallazgos. En el presente ensayo pictórico exponemos diferentes tipos de técnica de reconstrucción del LCA, con énfasis en el concepto de reconstrucción anatómica, presentando distintas posiciones del túnel femoral, buscando entregar herramientas al radiólogo para reconocer la normalidad postoperatoria e interpretar posibles complicaciones.


In daily radiological practice, we frequently fid different ACL reconstruction techniques, which we must know in order to achieve adequate interpretation of the fidings. In this pictorial essay, we show different types of LCA reconstruction techniques, highlighting the anatomical reconstruction concept and presenting different positions of the femoral tunnel, seeking to deliver tools to the radiologist in order to recognize the normal postoperative fidings and possible complications.


Subject(s)
Humans , Femur/surgery , Femur/diagnostic imaging , Anterior Cruciate Ligament Reconstruction/methods , Postoperative Period , Magnetic Resonance Imaging , Femur/anatomy & histology
4.
Rev. cuba. inform. méd ; 6(1)ene.-jun. 2014.
Article in English | LILACS, CUMED | ID: lil-739244

ABSTRACT

Automatically averaged photoplethysmographic (PPG) signals were fit to a 3-element windkessel model using a Gauss-Newton optimization algorithm. Data corresponded to 78 healthy subjects (ages from 8 to 87 years). Unlike other reports, two phase velocities are also estimated from the model. Gender differences were found, particularly respect to individual parameters correlation with age. When a nonlinear model was fit to the two first principal components, a high correlation with age was found for both females (r=0.69) and male subjects (r=0.77). Our results further support the idea that the PPG signal is a valuable source of information about the cardiovascular system, comparable to the much more expensive continuous pressure signal(AU)


Señales fotopletismográficas automáticamente promediadas fueron ajustadas a un modelo de bomba hidráulica de tres elementos. Para ello se utilizó un algoritmo de optimización del tipio Gauss-Newton. Los datos fueron obtenidos de 78 individuos sanos con edades entre 8 y 87 años. A diferencia de otros reportes, en el presente trabajo se estimaron dos velocidades de fase a partir del modelo. Al aplicar un modelo no lineal respecto los dos primeros componentes principales, se obtuvo una elevada correlación con la edad tanto para los sujetos femeninos (r=0.69) como para los masculinos (r=0.77). Nuestros resultados ofrecen un apoyo adicional a la idea de que la señal fotopletismográfica es una fuente importante de información acerca del sistema cardiovascular, comparable a la señal de presión continua, aun cuando esta última es mucho más costosa(AU)


Subject(s)
Humans , Male , Female , Child , Aged , Photoplethysmography/methods , Diagnostic Techniques, Cardiovascular , Models, Theoretical
5.
Bol. chil. parasitol ; 54(1/2): 25-9, ene.-jun. 1999. tab
Article in Spanish | LILACS | ID: lil-253239

ABSTRACT

During 1997 a seroepidemiological study on Chagas' disease was carried out in 18 localities of three provinces (Tocopilla,El Loa and Antofagasta) of Region II (20º 56'-26º south lat.; 70º 38'- 67º west long.), in order to asses the impact of the control program against triatoma infestans launched in 1988, based on insecticide spraying of dwellings. By means of ELISA and an indirect hemagglutination test for chagas' disease blood samples from 1,034 children under 10 years of age were examined, arising a 0.5 por ciento (3 cases) positivity. Test resulted positivite in 2 (0.9 percent) children from the locality of San Pedro de Atacama and 1 (0.4 percent) from Calama city, all in the age group 6-10 year -old. However, none of their dwellings were found infested with T.infestants. These result indicate that the control program has a good possibility to prevent new human infections. It is advisable to continue the seroepidemiological and entomological vigilance and remark the necessity of increasing the effort in the study of transmission through other routes, to adopt or reinforce the pertinent preventive measures


Subject(s)
Humans , Male , Female , Infant , Child, Preschool , Chagas Disease/epidemiology , Triatoma/pathogenicity , Trypanosoma cruzi/pathogenicity , Chagas Disease/transmission , Chile/epidemiology , Disease Vectors , Insect Control , Insect Vectors/drug effects , Insecticides/therapeutic use , Serologic Tests , Trypanosoma cruzi/drug effects , Trypanosoma cruzi/isolation & purification
6.
Bol. chil. parasitol ; 51(3/4): 76-9, jul.-dic. 1996. tab
Article in Spanish | LILACS | ID: lil-189293

ABSTRACT

In order to assess the impact of a control program against triatoma infestans launched in 1988, based on insecticide spraying of dwellings, a serological survey for chagasic infection was carried out during 1995 in three localities from San Pedro de Atacama county (22º55' south lat., 68º12' west long.), II Region of Antofagasta in northern Chile. Blood samples from 531 children and adolescents and 65 dogs were subjected to ELISA test and indirect inmunofluorescent test for Chagas's disease respectively. Tests resulted positive in 12 (2,3 percent) persons, all above 5 years old, in contrast with the 16,8 percent serological positivity observed in 1985. Three (4,6 percent) dogs (two 0-12 months old) resulted positive. These results indicate that dwellings sprayings with long-term activity insecticides against T. infestans is a good tool to prevent new human infections with T. cruzi. However, active vector transmissiom among domestic animals (canines) could be recently acquired.


Subject(s)
Humans , Animals , Male , Female , Infant , Child, Preschool , Adolescent , Adult , Dogs , Chagas Disease/epidemiology , Cross-Sectional Studies , Serologic Tests/statistics & numerical data , Animals, Domestic/parasitology , Chagas Disease/diagnosis , Chagas Disease/transmission , Chile/epidemiology , Insecticides , Pest Control, Biological , Rural Population/statistics & numerical data , Triatoma/drug effects , Triatoma/parasitology , Trypanosoma cruzi/drug effects , Trypanosoma cruzi/pathogenicity
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