RESUMEN
Introducción: En el Municipio de El Cairo Valle se reportó un brote de Tifus Murino, el cual habitualmente no se diagnostica en la región. Métodos: Se presenta una serie de casos obtenidos del Sitema de Vigilancia Epidemiológica del Municipio de El Cairo, administrado por el Hospital Municipal. Resultados: Se reportan 34 casos nuevos de Tifus Murino, que como característicasespeciales fueron predominantemente femeninos, y población adulta. Conclusión: El brote fue controlado con la oportuna intervención del Comité de Vigilancia Epidemiológica del Municipio y coordinado por diferentesinstituciones.
Asunto(s)
Humanos , Infestaciones Ectoparasitarias/clasificación , Infestaciones Ectoparasitarias/diagnóstico , Infestaciones Ectoparasitarias/epidemiología , Tifus Endémico Transmitido por Pulgas/clasificación , Tifus Endémico Transmitido por Pulgas/epidemiología , Zoonosis/epidemiologíaRESUMEN
Murine typhus and scrub typhus are important human rickettsial diseases in Thailand. Small mammals, including many species of rodents and shrews, serve as the reservoir host of rickettsial diseases. Rickettsia typhi can be transmitted to humans by fleas causing murine typhus, while infection with Orientia tsutsugamushi causing scrub typhus in humans is transmitted by chiggers. The prevalence of rickettsial infection depends on the geographic area. The seroprevalence of antibody to R. typhi and O. tsutsugamushi was studied in commensal rodents and shrews trapped in markets in the Bangkok Metropolitan Area (BMA). R. typhi and O. tsutsugamushi antigen prepared in the yolk sac of embryonated eggs were used to determine the specific antibody in trapped animals' sera by using fluorescein isothiocyanate (FITC)-anti rat immunoglobulins as a second antibody. Antibody to R. typhi was found in 25 (5%) of 500 sera tested and no antibody to O. tsutsugamushi was detected. R. typhi antibody titer ranged from 40-1280 and was found in Rattus norvegicus (4.2%), Rattus rattus (0.4%), Rattus exulans (0.2%), and Mus musculus (0.2%) trapped in 8 of 47 markets in the BMA. R. typhi antibody was commonly found in R. norvegicus. The authors concluded that murine typhus is an important rickettsial disease and R. norvegicus is an important reservoir species of rodents found in markets of the BMA.
Asunto(s)
Animales , Anticuerpos Antibacterianos/análisis , Muridae , Ratas , Infecciones por Rickettsia/epidemiología , Enfermedades de los Roedores/epidemiología , Tifus por Ácaros/epidemiología , Estudios Seroepidemiológicos , Tailandia/epidemiología , Tupaiidae , Tifus Endémico Transmitido por Pulgas/epidemiología , Salud UrbanaAsunto(s)
Animales , Anticuerpos Antibacterianos/aislamiento & purificación , Malasia/epidemiología , Orientia tsutsugamushi/aislamiento & purificación , Prevalencia , Ratas , Infecciones por Rickettsia/epidemiología , Rickettsia typhi/aislamiento & purificación , Roedores , Tifus por Ácaros/epidemiología , Estudios Seroepidemiológicos , Tifus Endémico Transmitido por Pulgas/epidemiologíaRESUMEN
To estimate the prevalence of spotted fever (SF) and murine typhus (MT) rickettsioses in Southeast Asia, we performed serosurvey by immunoperoxidase test on local residents in Taiwan and Thailand, comparing them with those of Japan. In Japan, the prevalence of antibodies (1:80 as cut-off level) to some SF/MT antigens was noticeable in Japanese SF-endemic areas or a high-risk groups. In Tainan, Taiwan, SF antibodies were not so prevalent (3.5 to 4.4%), but MT antibodies were more prevalent (23.9%). In Chiang Rai in northern Thailand SF antibodies were markedly prevalent (9.0 to 21.3%); the reactivity with Thai tick 118 strain alone was 8.2%, but MT was less (2.5%). These results suggest that these rickettsioses may be latently distributed in various parts of Asia.
Asunto(s)
Adulto , Enfermedades de los Trabajadores Agrícolas/epidemiología , Femenino , Humanos , Japón/epidemiología , Masculino , Prevalencia , Infecciones por Rickettsia/epidemiología , Estudios Seroepidemiológicos , Taiwán/epidemiología , Tailandia/epidemiología , Tifus Endémico Transmitido por Pulgas/epidemiologíaRESUMEN
A high prevalence of murine typhus was found in the human and rodent populations of Senaling, West Malaysia. In addition to 2 index cases which prompted the investigation, 45% of the humans and 35% of the rodents had IFA titers of 1/50 or greater. Serological studies provided evidence of recent infections in 3 human subjects. In a control group of Malaysian soldiers IFA titers of 1/50 or greater were found in only 13 (5%) of 265 sera tested.