Browsing by Autor "Rojas, Ernesto"

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    Evaluación hepática y renal en pacientes que recibieron conjuntamente zinc y tratamiento antituberculosis acortado
    (Gac Med Bol, 2019) Verduguez-Orellana, Aleida; Guzmán-Rivero, Miguel; Rojas, Ernesto; Choque Martínez, Esther
    La terapia de la tuberculosis con el esquema 2RHZE/4HE comprende la administración durante seis meses de rifampicina, isoniazida, pirazinamida y etambutol, de las cuales las tres primeras son potencialmente hepatotoxicas y excepcionalmente nefrotoxicas. La tuberculosis produce depleción de la concentración de zinc lo que incrementa la susceptibilidad a la cronicidad de la infección. Objetivo: evaluar el efecto de la administración conjunta de zinc y la terapia 2RHZE/4HE sobre la función hepática y renal en pacientes con tuberculosis pulmonar. Métodos: estudio descriptivo de tipo caso control, doble ciego aleatorizado con 22 pacientes con tuberculosis pulmonar en terapia farmacológica y 22 controles sanos reclutados en los centros de salud Sebastián pagador y Alalay. Los pacientes fueron divididos aleatoriamente en dos grupos a los que se les administró zinc (45mg/día) o placebo durante tres meses. En todos los pacientes se tomó muestras de sangre antes y después de la intervención para medir pruebas de función renal y hepática. En los sujetos control la muestra de sangre se tomó al inicio del estudio para realizar las mismas determinaciones. Resultados: no se encontró deferencias en la concentración de marcadores específicos de daño hepático o renal. Conclusiones: la adición de un suplemento diario de 45mgr de zinc a la terapia 2RHZE/4HE no produjo daño renal ni hepático en las personas evaluadas.
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    [Knowledge, practices, and human seroprevalence of brucellosis in the central dairy-producing area of Cochabamba, BoliviaConhecimentos, práticas e soroprevalência humana de brucelose na área central de produção de laticínios de Cochabamba, Bolívia].
    (2025) Yanez, Rosse Mary; Quitón, Rocío; Rojas, Ernesto; Vargas, Tania; Eid, Daniel; Letesson, Jean-Jacques; Rodríguez, Patricia
    OBJECTIVE: To validate the applicability of the Rose Bengal (RB) test, indirect IgG or IgM enzyme-linked immunosorbent assay (ELISA), and the Brucellacapt test® to the local context, determine the seroprevalence of brucellosis, and evaluate knowledge of the disease in people at risk in a dairy-producing area of La Maica, Cochabamba (Plurinational State of Bolivia). METHOD: The tests were initially validated with a group of 76 people; the final study population was 330 people, who also participated in a socio-epidemiological survey. RESULTS: Of 330 samples tested, 12.7% were positive, using either the RB or Brucellacapt test®. The indirect IgG ELISA gave false positive results, indicating that the cut-off point should be adapted to the local epidemiological situation. Almost all RB-positive cases were asymptomatic. The socio-epidemiological survey highlights a lack of information and awareness about brucellosis, with regard to its zoonotic nature, mode of transmission, and symptoms. CONCLUSION: This study revealed a high seroprevalence of brucellosis in the La Maica dairy-producing area in Cochabamba (Plurinational State of Bolivia), with many asymptomatic cases and a high number of false positives from IgG indirect ELISA. It is recommended to conduct awareness-raising campaigns on the risks of this disease and to discourage the consumption of raw milk.
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    Leishmaniases in Bolivia: comprehensive review and current status.
    (2009) García, Ana L; Parrado, Rudy; Rojas, Ernesto; Delgado, Raúl; Dujardin, Jean-Claude; Reithinger, Richard
    The leishmaniases are protozoan, zoonotic diseases transmitted to human and other mammal hosts by the bite of phlebotomine sandflies. Bolivia has the highest incidence of cutaneous leishmaniasis (CL) in Latin America (LA), with 33 cases per 100,000 population reported in 2006. CL is endemic in seven of the country's nine administrative departments. Visceral leishmaniasis (VL) is comparatively rare and is restricted to one single focus. Most CL cases are caused by Leishmania (Viannia) braziliensis (85% cases); VL is caused by L. (L.) infantum. Seven sandfly species are incriminated as vectors and Leishmania infections have been detected in several non-human mammal hosts. Transmission is associated with forest-related activities, but recently, cases of autochthonous, urban transmission were reported. Because most cases are caused by L. (V.) braziliensis, Bolivia reports the greatest ratio (i.e., up to 20% of all cases) of mucosal leishmaniasis to localized CL cases in LA. Per national guidelines, both CL and VL cases are microscopically diagnosed and treated with pentavalent antimony.