Seroprevalence and risk factors associated with hepatitis C: a cross-sectional study of persons who inject drugs in Puerto Rico, 2018.

BACKGROUND: People Who Inject Drugs (PWID) are at a higher risk of acquiring bloodborne infections. We aimed to estimate the seroprevalence of the Hepatitis C Virus (HCV) in PWID and identify correlates and risk factors using data from the Puerto Rico National HIV Behavioral Surveillance System, PWID cycle 5, conducted in 2018. METHODS: A total of 502 San Juan Metropolitan Statistical Area participants were recruited through the Respondent Driven Sampling method. Sociodemographic, health-related, and behavioral characteristics were assessed. Testing for HCV antibodies was completed after the face-to-face survey. Descriptive and logistic regression analyses were performed. RESULTS: Overall seroprevalence of HCV was 76.5% (95% CI: 70.8-81.4%). A significantly (p < 0.05) higher HCV seroprevalence was observed among PWID with the following characteristics: heterosexuals (78.5%), high school graduates (81.3%), tested for sexually transmitted infections (STI) in the past 12 months (86.1%), frequent speedball injection (79.4%), and knowing the HCV serostatus of the last sharing partner (95.4%). Adjusted logistic regression models showed that having completed high school and reported STI testing in the past 12 months were significantly associated with HCV infection (ORa = 2.23; 95% CI: 1.06-4.69; ORa = 2.14; 95% CI: 1.06-4.30, respectively). CONCLUSIONS: We report a high seroprevalence of HCV infection in PWID. Social health disparities and potential missed opportunities validate the continuing call for local action for public health and prevention strategies.

Provider-Initiated HIV Testing in Puerto Rico from Data of the National HIV Behavioral Surveillance-Heterosexual Cycle (NHBS-HET) 2016: National Cross-sectional Survey.

BACKGROUND: According to the Centers for Disease Control and Prevention and World Health Organization guidelines, all individuals aged 13-64 years should get screened for HIV infection as part of their routine medical examinations. Individuals at high risk should get tested annually. OBJECTIVE: This study aimed to identify the sociodemographic, health care, and sexual behavioral characteristics of provider-initiated HIV testing using data from the Puerto Rico National HIV Behavioral Surveillance 2016 cycle, directed toward heterosexual individuals at increased risk of HIV infection. METHODS: A sample of 358 eligible participants were recruited through respondent-driven sampling, where sociodemographic characteristics, health care use, and HIV test referral were used to assess a description of the study sample. Pearson chi-square and Fisher tests were used to evaluate proportional differences. Multivariate logistic regression models were performed to determine the association between independent variables and HIV test referral. Adjusted prevalence ratios by sex and age with their 95% CIs were determined using a statistical significance level of .05. RESULTS: Despite 67.9% (243/358) of participants showing high-risk sexual behavioral practices and 67.4% (236/350) reporting a low perceived risk of HIV infection among those who visited a health care provider within the last 12 months, 80.7% (289/358) of the study sample did not receive an HIV test referral at a recent medical visit. Multivariate analysis showed that the estimated prevalence of the participants who received an HIV test referral among those who reported being engaged in high-risk sexual behaviors was 41% (adjusted prevalence ratio .59, 95% CI .39-.91; P=.02) lower than the estimated prevalence among those who did not engage in high-risk sexual behavior. CONCLUSIONS: This sample of Puerto Rican adults reported a significantly lower prevalence of receiving an HIV test referral among heterosexual individuals at increased risk of HIV infection who engaged in high-risk behaviors. This study further emphasizes the need for health care providers to follow recommended guidelines for HIV test referrals in health care settings. Promotion practices in the future should include enhancing referral and access to HIV tests and implementing preventive measures to counteract the HIV epidemic in Puerto Rico.

Social Media and Mobile-App use for Sexual Encounters among Men Who Have Sex With Men in Puerto Rico.

OBJECTIVE: To describe the use and frequency of use of mobile apps (internetand/ or smartphone-based geospatial networking apps) among men who have sex with men (MSM) and how these platforms are used to engage with sexual partners in PR. METHODS: A local module including questions regarding mobile apps and sexual engagement and derived from the 2017 Puerto Rico National HIV Behavioral Surveillance System, fifth MSM cycle, was used for this analysis. A subsample of 127 eligible participants was recruited through venue-based sampling and assented to participate. Univariate analysis was used to evaluate sociodemographic and behavioral characteristics, HIV testing, and the ways in which mobile apps are used to find sexual partners. RESULTS: The participants' median age was 35 years, with a standard deviation of ±11.37 years. Most of our sample (97%) had had anal sex with at least 1 partner in the last 12 months, and 76% of them had had condomless anal sex. Over three fourths (81%) reported using apps for sexual encounters, while 45% stated that the most frequently used app was Grindr. Of the participants who had used apps for sexual encounters, 57% had met 5 or more sexual partners through apps in their lifetime. CONCLUSION: This study shows that there is a need for further research to understand the habits of this population in PR regarding the use of apps to find sexual partners and, also, as a possible way to develop strategies for prevention and health promotion in this group.

Risk Factors Associated with Dengue Transmission and Spatial Distribution of High Seroprevalence in Schoolchildren from the Urban Area of Medellin, Colombia.

Dengue fever is an increasing health problem in tropical and subtropical regions. During 2010 in Medellin, the younger population presented a particularly high dengue incidence rate. This study estimated dengue virus (DENV) transmission in schoolchildren (aged 5-19 years) in Medellin from 2010 to 2012. A longitudinal serological survey (IgG) and spatial analysis were conducted to determine the distribution of DENV seroprevalence. A total of 4,385 schoolchildren participated for at least one year. Dengue seroprevalence significantly increased during the studied period (53.8% to 64.6%; p < 0.001). A significantly higher seroconversion rate was observed in 2010-2011 (16.8%) compared to 2011-2012 (7.8%). Multivariate regression analysis showed that the main factor associated with the seroprevalence was the aging. Furthermore, in 2010, patients with high socioeconomic status presented a lower risk. Predominant multitypic and DENV4 monotypic antibody responses were demonstrated. Geostatistical analysis evidenced a temporal clustering distribution of DENV seroprevalence in 2010. Population density and Ae. aegypti House Index were significantly correlated with the observed pattern. This study revealed high DENV transmission in schoolchildren determined as "sentinel population." High DENV risk was found in districts with combined poorly socioeconomic conditions and densest human and mosquito populations. These findings may allow to target population for effective prevention and vaccination campaigns.

Actividad en suero de CK y CK-MB en pacientes con infección por el virus dengue / Serum activity of CK and CK-MB in patients with dengue virus infection

RESUMEN Objetivo Determinar la actividad en suero de CK y CK-MB en pacientes con dengue. Métodos Se realizó un estudio de corte en el Departamento de Antioquia. La población de estudio estuvo constituida por 54 pacientes con diagnóstico de dengue y por 10 controles sanos. A todos los participantes se les tomó muestra de suero para confirmar la infección por dengue y para hacer la medición de la actividad de CK y CK-MB. Resultados La mediana de la edad de los casos de dengue fue 18 años y la de los controles fue 28,5 años. La mitad de los pacientes con dengue (50,9 %) y ninguno del grupo control presentaron CK-MB elevada. Ningún paciente presentó miocarditis, sin embargo, se observó CK-MB elevada en 33,3 %, 44,4 % y 40 % de los casos con bradicardia, taquicardia e hipotensión respectivamente. En 29,6 % de los pacientes con dengue se detectó CK elevada, en contraste con 10 % en el grupo control. Se observó actividad de CK en pacientes con dengue con presencia de síntomas como vómito, hematemesis y dolor abdominal, 87,5 %, 60 % y 50 % respectivamente. Conclusiones En este estudio ningún paciente con dengue presentó cardiopatía o miositis, sin embargo, el hecho de encontrar mayor frecuencia de CK y CK-MB elevadas en los pacientes con dengue con respecto al grupo control, sugiere compromiso del músculo estriado y cardíaco en este grupo. Por esta razón sería pertinente el monitoreo de estas enzimas en pacientes con dengue como parte de la evolución de la enfermedad.(AU)

ABSTRACT Objective To determine the serum activity of CK and CK-MB in patients with dengue infection. Methods A cross section study was conducted in the State of Antioquia, Colombia. The study population consisted in 54 patients with diagnosis of dengue infection and 10 healthy controls. A blood sample was taken from all participants to confirm dengue infection and to measure the activity of CK and CK-MB. Results The median age of dengue cases was 18 years and the median age of healthy controls was 28.5 years. Half of dengue patients (50.9 %) had elevated levels of CK-MB, in contrast with the healthy controls in which none presented increase of this enzyme. No patient presented myocarditis; however, elevated CK-MB was observed in 33.3 %, 44.4 % and 40 % of cases with bradycardia, tachycardia and hypotension respectively. In 29.6 % of the dengue patients, high level of CK was detected, in contrast to 10 % in the control group. Activity of CK elevated was observed in dengue patients with symptoms such as vomiting, hematemesis and abdominal pain, 87.5 %, 60 % and 50 %, respectively. Conclusions In this study, no patient with dengue infection had heart disease or myositis; however, the finding of a higher frequency of elevated level CK and CK-MB in the dengue patients compared to the control group suggests the involvement of the striated muscle and of the cardiac muscle in this group. For this reason, the monitoring of these enzymes should be considered as part of the monitoring of patients with dengue.(AU)

[Serum activity of CK and CK-MB in patients with dengue virus infection]. / Actividad en suero de CK y CK-MB en pacientes con infección por el virus dengue.

OBJECTIVE: To determine the serum activity of CK and CK-MB in patients with dengue infection. METHODS: A cross section study was conducted in the State of Antioquia, Colombia. The study population consisted in 54 patients with diagnosis of dengue infection and 10 healthy controls. A blood sample was taken from all participants to confirm dengue infection and to measure the activity of CK and CK-MB. RESULTS: The median age of dengue cases was 18 years and the median age of healthy controls was 28.5 years. Half of dengue patients (50.9 %) had elevated levels of CK-MB, in contrast with the healthy controls in which none presented increase of this enzyme. No patient presented myocarditis; however, elevated CK-MB was observed in 33.3 %, 44.4 % and 40 % of cases with bradycardia, tachycardia and hypotension respectively. In 29.6 % of the dengue patients, high level of CK was detected, in contrast to 10 % in the control group. Activity of CK elevated was observed in dengue patients with symptoms such as vomiting, hematemesis and abdominal pain, 87.5 %, 60 % and 50 %, respectively. CONCLUSIONS: In this study, no patient with dengue infection had heart disease or myositis; however, the finding of a higher frequency of elevated level CK and CK-MB in the dengue patients compared to the control group suggests the involvement of the striated muscle and of the cardiac muscle in this group. For this reason, the monitoring of these enzymes should be considered as part of the monitoring of patients with dengue.

OBJETIVO: Determinar la actividad en suero de CK y CK-MB en pacientes con dengue. MÉTODOS: Se realizó un estudio de corte en el Departamento de Antioquia. La población de estudio estuvo constituida por 54 pacientes con diagnóstico de dengue y por 10 controles sanos. A todos los participantes se les tomó muestra de suero para confirmar la infección por dengue y para hacer la medición de la actividad de CK y CK-MB. RESULTADOS: La mediana de la edad de los casos de dengue fue 18 años y la de los controles fue 28,5 años. La mitad de los pacientes con dengue (50,9 %) y ninguno del grupo control presentaron CK-MB elevada. Ningún paciente presentó miocarditis, sin embargo, se observó CK-MB elevada en 33,3 %, 44,4 % y 40 % de los casos con bradicardia, taquicardia e hipotensión respectivamente. En 29,6 % de los pacientes con dengue se detectó CK elevada, en contraste con 10 % en el grupo control. Se observó actividad de CK en pacientes con dengue con presencia de síntomas como vómito, hematemesis y dolor abdominal, 87,5 %, 60 % y 50 % respectivamente. CONCLUSIONES: En este estudio ningún paciente con dengue presentó cardiopatía o miositis, sin embargo, el hecho de encontrar mayor frecuencia de CK y CK-MB elevadas en los pacientes con dengue con respecto al grupo control, sugiere compromiso del músculo estriado y cardíaco en este grupo. Por esta razón sería pertinente el monitoreo de estas enzimas en pacientes con dengue como parte de la evolución de la enfermedad.