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2. Seroprevalencia de Leptospirosis en Puente Piedra, Lima en el año 2006

Author

Platts-Mills, James A., LaRochelle, Patrick, Campos, Kalina, Vinetz, Joseph M., Gotuzzo, Eduardo, and Ricaldi, Jessica N.

Subjects
Perú, Peru, Seroprevalencia, Seroprevalence, Leptospirosis, Seroepidemiologic studies, Estudios epidemiológicos
Abstract

La leptospirosis es una enfermedad ampliamente prevalente en áreas tropicales, pero también se presenta en áreas urbanas. El presente estudio tiene como objetivo determinar la seroprevalencia para Leptospira en el distrito de Puente Piedra, donde se han presentado casos de leptospirosis severa en los últimos años. Se recolectaron datos relacionados a factores de riesgo asociados con leptospirosis y muestras de sangre de 250 participantes, seleccionados por un muestreo aleatorio. Se encontró una alta prevalencia de factores de riesgo en la población y, usando la prueba de aglutinación microscópica, anticuerpos circulantes contra Leptospira en solamente tres participantes (1,2%). Leptospirosis is a disease widely prevalent in tropical areas, but may also be present in urban areas. The present study aims to determine the seroprevalence of Leptospira in the district of Puente Piedra, where there have been cases of severe leptospirosis in recent years. We collected data related to risk factors associated with leptospirosis and blood samples from 250 participants, selected by random sampling. We found a high prevalence of risk factors in the population and using the microscopic agglutination test, antibodies were found in only 3 participants (1.2%).

Published
2011

3. Primera Evidencia Serológica de Infección por Hantavirus en Roedores, en Colombia

Author

Alemán, Ader, Iguarán, Haydeé, Puerta, Henry, Cantillo, César, Mills, James, Ariz, William, and Mattar, Salim

Subjects
seroprevalence, seroprevalencia, rodent, Colombia, Hantavirus, roedores
Abstract

objetivo Determinar la prevalencia de infección por hantavirus en roedores del Departamento de Córdoba, Colombia. Metodologia Captura de roedores con trampas tipo Sherman live-capture traps (8x9x23 cm; Sherman Traps, Inc., Tallahassee, FL) en áreas domésticas y peridomésticas en el departamento de Córdoba. Analisis de anticuerpos IgG por ELISA, empleando como antígeno una proteína recombinante de la nucleocapside del Sin Nombre Virus (SNV) (CDC, Atlanta, Georgia, USA). Resultados Durante los meses de enero de 2003 a noviembre de 2004, en 79 noches de trampeo fueron capturados 336 roedores en once municipios del departamento de Córdoba (Murinae: 249; Sigmodontinae: 68; Heteromyidae: 17; Echimyidae: 2) (éxito de captura del 8,5 %). La seroprevalencia de anticuerpos contra hantavirus fue del 2,1 % (7 de 336 capturas). Los porcentajes de seropositividad específicos por género oscilaron entre 5,9 % (1 de 17, Heteromys) a 50 % (1 de 2, Proechimys). Conclusiones La prevalencia de anticuerpos contra el SNV en roedores de Córdoba, Colombia; indica que al menos un hantavirus es endémico en roedores del norte colombiano y esta frecuentemente trasmitido a residentes rurales. objective Determining Hantavirus infection prevalence in rodents in the Córdoba department, Colombia. Methods Rodents were captured using Sherman live-capture traps (8x9x23 cm; Sherman Traps, Inc., Tallahassee, FL) in peridomestic areas of Córdoba. Hantavirus IgG antibodies were detected by ELISA using Sin Nombre virus (SNV) recombinant nucleocapsid antigen (CDC, Atlanta, Georgia, USA). Results 336 rodents were captured in 11 townships in the Córdoba department (Murinae: 249; Sigmodontinae: 68; Heteromyidae: 17; Echimyidae: 2; 8,5 % overall trap success) during 79 nights of trapping between January 2003 and November 2004. Hantavirus antibody seroprevalence was 2,1 % (7 out of 336 captures). Prevalence by genus varied between 5,9 % (1 out of 17 Heteromys) to 50 % (1 out of 2 Proechimys). ConclusionsSNV-reactive antibody prevalence in rodents in Córdoba, Colombia, indicated that at least one hantavirus is endemic in rodents in northern Colombia and is frequently transmitted to rural residents.

Published
2006

4. Posibilidades para el control de la fiebre hemorrágica boliviana

Author

Kilgore, Paul E., Peters, Clarence J., Mills, James N., Rollin, Pierre E., Armstrong, Lori, Khan, Ali S., and Ksiazek, Thomas G.

Subjects
Fiebre Hemorrágica Boliviana, Ciencias Veterinarias, Ciencias Médicas
Abstract

La fiebre hemorrágica Boliviana (BHF) fue primero identificada en 1959 como una enfermedad hemorrágica esporádica en áreas rurales del departamento de Beni, Bolivia. Los grupos de pacientes de BHF se notaron el mismo año, y por 1962 la BHF se reconoció como una enfermedad infecciosa epidémica nueva. En 1963, el virus Machupo (un miembro de la familia Arenaviridae) fue primero aislado de pacientes con fiebre hemorrágica aguda en San Joaquin, Bolivia. Las investigaciones ecológicas establecieron al roedor Calomys callosus, que es indígena a la región endémica de la enfermedad en el norte de Bolivia, como el reservorio del virus Machupo. Concurrentemente con la carencia de identificación de los pacientes con BHF durante la década de 1970 y 1980, el énfasis en los programas de control de roedores en las áreas endémicas de BHF también disminuyeron. Además, en años recientes, los funcionarios Bolivianos de salud han encarado otros numerosos problemas de salud pública, incluyendo enfermedades diarreicas, tuberculosis, enfermedad de Chagas, enfermedades de transmisión sexual, y el síndrome de inmunodeficiencia adquirida. Así, las autoridades locales de salud se enfrentan con el desafío de destinar limitados recursos de salud para el control de BHF con demanda de trabajo para otras importantes enfermedades en aumentos., Facultad de Ciencias Veterinarias

Published
1997

5. Un brote inusual de Hantavirus en el sur de Argentina: ¿transmisión persona a persona?

Author

Wells, Rachel M., Sosa Estani, Sergio, Yadon, Zaida E., Enria, Delia, Padula, Paula, Pini, Noemí, Mills, James N., Peters, Clarence J., Segura, Elsa L., and Grupo de Estudios del Síndrome Pulmonar por Hantavirus en la Patagonia

Subjects
Ciencias Veterinarias, Transmisión persona a persona, Argentina, Hantavirus
Abstract

El síndrome pulmonar por Hantavirus es una zoonosis sostenida por roedores reconocida primero en los Estados Unidos en 1993. La transmisión persona a persona no ha sido informada; sin embargo, en un brote de 20 casos informados aquí, la evidencia epidemiológica sugiere fuertemente esta ruta de transmisión., Facultad de Ciencias Veterinarias

Published
1997

6. [Seroprevalence of leptospirosis in Puente Piedra, Lima, in 2006].

Author

Platts-Mills JA, LaRochelle P, Campos K, Vinetz JM, Gotuzzo E, and Ricaldi JN

Subjects
Adolescent, Adult, Child, Female, Humans, Male, Peru epidemiology, Seroepidemiologic Studies, Urban Health, Young Adult, Leptospirosis epidemiology
Abstract

Leptospirosis is a disease widely prevalent in tropical areas, but may also be present in urban areas. The present study aims to determine the seroprevalence of Leptospira in the district of Puente Piedra, where there have been cases of severe leptospirosis in recent years. We collected data related to risk factors associated with leptospirosis and blood samples from 250 participants, selected by random sampling. We found a high prevalence of risk factors in the population and using the microscopic agglutination test, antibodies were found in only 3 participants (1.2%).

Published
2011
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7. [First serological evidence of Hantavirus infection in rodents in Colombia].

Author

Alemán A, Iguarán H, Puerta H, Cantillo C, Mills J, Ariz W, and Mattar S

Subjects
Animals, Animals, Wild virology, Colombia epidemiology, Female, Hantavirus Infections diagnosis, Hantavirus Infections epidemiology, Male, Mice, Rats, Rodent Diseases virology, Rural Health, Seroepidemiologic Studies, Sigmodontinae virology, Urban Health, Antibodies, Viral blood, Orthohantavirus immunology, Hantavirus Infections veterinary, Rodent Diseases epidemiology, Sigmodontinae blood
Abstract

Objective: Determining Hantavirus infection prevalence in rodents in the C6rdoba department, Colombia., Methods: Rodents were captured using Sherman live-capture traps (8 x 9 x 23 cm; Sherman Traps, Inc., Tallahassee, FL) in peridomestic areas of Córdoba. Hantavirus IgG antibodies were detected by ELISA using Sin Nombre virus (SNV) recombinant nucleocapsid antigen (CDC, Atlanta, Georgia, USA)., Results: 336 rodents were captured in 11 townships in the Córdoba department (Murinae: 249; Sigmodontinae: 68; Heteromyidae: 17; Echimyidae: 2; 8.5% overall trap success) during 79 nights of trapping between January 2003 and November 2004. Hantavirus antibody seroprevalence was 2.1% (7 out of 336 captures). Prevalence by genus varied between 5.9% (1 out of 17 Heteromys) to 50% (1 out of 2 Proechimys)., Conclusions: SNV-reactive antibody prevalence in rodents in Córdoba, Colombia, indicated that at least one hantavirus is endemic in rodents in northern Colombia and is frequently transmitted to rural residents.

Published
2006

8. [The new-world hantaviruses. Ecology and epidemiology of an emerging virus in Latin America].

Author

Puerta H, Cantillo C, Mills J, Hjelle B, Salazar-Bravo J, and Mattar S

Subjects
Animals, Arvicolinae, Communicable Diseases, Emerging virology, Disease Reservoirs, Enzyme-Linked Immunosorbent Assay, Humans, Latin America epidemiology, Reverse Transcriptase Polymerase Chain Reaction, Seroepidemiologic Studies, Sigmodontinae, Zoonoses, Communicable Diseases, Emerging epidemiology, Ecosystem, Orthohantavirus, Hantavirus Pulmonary Syndrome epidemiology
Abstract

The hantaviruses are a group of emerging rodent-borne pathogens (family Bunyaviridae; Genus Hantavirus) that are etiologic agents for hemorrhagic fever with renal syndrome (HFRS) in Europe and Asia and hantavirus cardiopulmonary syndrome (HCPS) in the Americas. HFRS is associated with rodents of the family Muridae, subfamilies Murinae and Arvicolinae; HPS is associated with rodents of the subfamily Sigmodontinae. Since the identification of HCPS in USA in 1993, a large number of cases of HPS and an increasing number of hantaviruses and rodent reservoir hosts have been identified in Central and South America. Epidemiologic studies have demonstrated important differences in frequency of infection with hantaviruses in both human and rodent host populations. Antibody prevalences in rodent and human populations may vary from less than 1% to more than 40%. Currently, more than 1500 cases of HCPS have been reported and more than 15 genetically distinct variants of hantaviruses, all associated with sigmodontine rodents, have been identified throughout the Americas. Several characteristics distinguish Latin American HCPS cases from the classical HCPS described for the first time in the USA. These include a variation in severity of disease from moderate and self-limiting to severe, the demonstration of person-to-person transmission, and a somewhat higher incidence of extrapulmonary clinical manifestations in the South American form of HCPS. Nevertheless, our understanding of hantaviruses in the Americas is still far from complete. The factors involved in the dynamics of these viruses in nature, their establishment and transmission within host populations and from hosts to humans, and the variable pathology of these viruses in humans are complex. It is likely that more hantaviruses will be described in the future, and much more data will be required in order to describe the diversity and evolution of this group of pathogens. Latin America, as the center of diversity for Sigmodontine rodents and their hantaviruses is presented with the unique opportunity as well as the challenge of being center stage for continued studies of the dynamics of hantaviruses in natural host populations and the links of host and virus to human populations.

Published
2006

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