Mansonelosis en el area sur-oriental de la Orinoquia venezolana

Medrano, Clemencia E.; Volcán, G.; Godoy, Gerardo

doi:10.1590/s0036-46651992000100011

Cited by 11 publications

(5 citation statements)

References 17 publications

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“…[15][16][17] In contrast, the prevalence found in Bolivia is lower than reported in the state of Bolivar, Venezuela (36.4%) (where in 1 area positivity increased to 94.4%), and in the Comisaría del Vaupes of Colombia (47%), where the adult Indians surveyed showed the highest infection rate (96%) recorded for M. ozzardi in the world. 1,18 Our results confirm the observations of other investigators that the prevalence rate increases with age. 1,17 In contrast to Haiti and Trinidad, where less than 2% and 3%, respectively, of the subjects less than 20 years old were positive, our study found 9% of the children 0-14 years of age infected and the youngest positive individual was an 11-month-old child.…”

Section: Discussionsupporting

confidence: 92%

Mansonella ozzardi infection in Bolivia: prevalence and clinical associations in the Chaco region.

Bartoloni

Cancrini²,

Bartalesi³

et al. 1999

The American Journal of Tropical Medicine and Hygiene

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Abstract.A cross-sectional survey carried out in the Chaco region of Bolivia showed that 26% (77 of 296) and 0.7% (2 of 298) of the rural population of the Camiri and Villa Montes areas, respectively, harbored Mansonella ozzardi microfilariae (mf). No significant differences were observed between sexes. The lowest prevalence (9%) was in the 0-14-year-old age group, with no children Ͻ11 months of age infected. The prevalence increased sharply in the 25-34-year-old age group (32%), and continued increasing in the older age classes. Microfilaremia, ranging from 1 to 305 mf/20 l of blood, was lowest in 0-14-year-old children (geometric mean concentration ϭ 1

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Section: Discussionsupporting

confidence: 92%

Mansonella ozzardi infection in Bolivia: prevalence and clinical associations in the Chaco region.

Bartoloni

Cancrini²,

Bartalesi³

et al. 1999

The American Journal of Tropical Medicine and Hygiene

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“…However, the prevalence was lower than that reported in the high Solimões (45.7%) and Pauini (28.4%) indigenous communities (Moraes et al 1978, Medeiros et al 2007). Indeed, a high prevalence has been found in some areas of Venezuela such as the state of Bolivar (36.4%) and in the Amazon Federal Territory (30%) (Medrano et al 1980, Formica & Botto 1990. In Colombia, infection was detected in the Comisaría del Valpes (47%), Comisaría del Guainía (20%) and Comisaría del AM (47.1%) (Marinkelle & German 1970, Kozek et al 1982, 1983 and also in the Chaco region of Bolivia (26%) (Bartoloni et al 1999).…”

Section: Discussionmentioning

confidence: 99%

Mansonella ozzardi in Brazil: prevalence of infection in riverine communities in the Purus region, in the state of Amazonas

Medeiros¹,

Py-Daniel²,

Barbosa³

et al. 2009

Mem. Inst. Oswaldo Cruz

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This study was undertaken to investigate the prevalence of Mansonella ozzardi infection and to estimate the parasitic infection rate (PIR) The filaria Mansonella ozzardi, one of the aetiological agents of mansonelliasis, is found on the American continent, as well as countries in the Caribbean. In South America, it has been reported in Panama, Colombia, Venezuela, Guyana, Suriname, Brazil, Argentina and Peru (Kozek et al. 1982). M. ozzardi is transmitted by Diptera insects of the families Ceratopogonidae in the Caribbean islands and Ceratopogonidae and Simuliidae in Central and South America (Shelley & Coscarón 2001).The pathogenicity of this filaria is not well defined. Several infected individuals show no symptoms; however, clinical manifestations that decrease the quality of life such as moderate fever, coldness in the legs, joint pains and headaches have been attributed to M. ozzardi infection (Batista et al. 1960b). Recently, the presence of ocular lesions has been reported as possibly associated with M. ozzardi infection (Branco et al. 1998, Cohen et al. 2008.The microfilaria M. ozzardi was detected in Brazil in the 1940s and 1950s (Deane 1949, Deane et al. 1954, Lacerda & Rachou 1956) and was described as a potentially extensive problem (Moraes 1958). Recently, some studies have shown that this filaria is still found with high prevalence (Medeiros et al. 2007(Medeiros et al. , 2008 and that simuliids are incriminated in the parasite's transmission in Brazil (Cerqueira 1959, Shelley & Shelley 1976, Shelley et al. 1980). Due to the absence of data and the importance of M. ozzardi for Amazonian populations, studies are still necessary to understand the geographical distribution of the cases, as well as the individual and cultural characteristics of the population in endemic areas that make them prone to infection. Indeed, eye lesions possibly associated with M. ozzardi have already been reported in the municipality of Pauini (Branco et al. 1998) and high prevalence rates were found in indigenous communities (Medeiros et al. 2007). Thus, our goal was to obtain data on human infection by M. ozzardi through comparison of prevalence rates between genders, as well as to examine the relationships between M. ozzardi infection and age and professional occupation. We also sought to identify the simuliid species involved in the transmission of M. ozzardi and to estimate the Parasitic Infection Rate (PIR) of the vectors. MATERIALs AND METHODsStudy area and population -This study was performed in the Purus and Pauini riverine communities in the municipality of Pauini (07º421'S 67º01'W), Amazonas (AM) (Fig. 1). The municipality of Pauini is located in southwest AM, about 900 km from Manaus. It has 17,092 inhabitants, with 6,970 in the urban zone and 10,122 in rural areas (IBGE 2000). The region is covered by native primary forest and presents long flood areas, accessible only by plane or boat. The rainy season is usually from November-March, with average annual temperatures between 24-26ºC, and a relative humidity bet...

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“…Afecta a las poblaciones rurales más pobres y con menos accesibilidad a los servicios de salud de todos los territorios de la cuenca amazónica de los países sudamericanos (14)(15)(16)(17) entre los que se destaca Brasil, por haber aportado mayor información acerca de su extensión en su vasto territorio y de las características clínicas y epidemiológicas.…”

Section: Discussionunclassified

Mansonelosis por Mansonella ozzardi en voluntarios para despistaje de malaria en la Amazonía peruana

Vargas

Arróspide

Gutiérrez

et al. 2015

Rev Peru Med Exp Salud Publica

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RESUMENObjetivos. Determinar la frecuencia, manifestaciones clínicas y factores asociados a la infección por Mansonella ozzardi en voluntarios de una campaña de despistaje de malaria en el distrito de Alto Nanay en la selva amazónica del Perú. Materiales y métodos. Se realizó un estudio descriptivo, analítico y transversal. Los participantes fueron entrevistados y examinados por un médico y los datos fueron registrados en una ficha clínica. El diagnóstico de infección por M. ozzardi se realizó mediante la técnica de gota gruesa y frotis. Resultados. La frecuencia de mansonelosis en esta población fue 47,8% (IC 95%: 39,1-56,6). Mediante el análisis bivariado se encontró que el reporte de disminución de la agudeza visual o visión borrosa y la presencia de tumoraciones subcutáneas fueron los signos y síntomas estadísticamente asociados con la infección por microfilarias (p<0,05). La regresión logística encontró asociación estadística para la residencia en localidades del río Pintuyacu o Alto Nanay, la ocupación en lugares alejados del centro poblado, la presencia de tumores subcutáneos y el engrosamiento de la piel (p<0,05). Conclusiones. Existe una elevada frecuencia de mansonelosis por M. ozzardi en el distrito de Alto Nanay, la cual se encontró significativamente relacionada con ocupaciones realizadas fuera del centro poblado, residencia en localidades del río Pintuyacu y lesiones cutáneas. Palabras clave: Mansonella ozzardi; Enfermedades desatendidas; Mansonella (fuente: DeCS BIREME). MANSONELOSIS BY Mansonella ozzardi IN VOLUNTEERS UNDERGOING SCREENING FOR MALARIA IN THE PERUVIAN AMAZON ABSTRACTObjectives. To determine the frequency, clinical features, and factors associated with M. ozzardi infection in volunteers of a malaria screening campaign in the district of Alto Nanay in the Amazon jungle of Peru. Materials and methods. A descriptive, analytical and cross-sectional study was performed. The participants were interviewed and examined by a physician and the data were recorded in a medical record. The diagnosis of M. ozzardi infection was performed using the method of thick blood smear and film. Results.The frequency of mansonelosis in this population was 47.8% (95% CI: 39.1 to 56.6). Through bivariate analysis we found that the report of decreased visual acuity or blurred vision and presence of subcutaneous tumors were the signs and symptoms statistically associated with the infection of microfilariae (p<0.05). Logistic regression found statistical association for residency in localities of the Pintuyacu or Alto Nanay rivers, employment in places far from the town center, the presence of subcutaneous tumors and skin thickening (p<0.05).Conclusions. There was a high number of mansonelosis by M. ozzardi in the district of Alto Nanay which was significantly related to working outside the town center, residing in the area of the Pintuyacu River, and skin lesions.

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Mansonelosis en el area sur-oriental de la Orinoquia venezolana

Cited by 11 publications

References 17 publications

Mansonella ozzardi infection in Bolivia: prevalence and clinical associations in the Chaco region.

Mansonella ozzardi infection in Bolivia: prevalence and clinical associations in the Chaco region.

Mansonella ozzardi in Brazil: prevalence of infection in riverine communities in the Purus region, in the state of Amazonas

Mansonelosis por Mansonella ozzardi en voluntarios para despistaje de malaria en la Amazonía peruana

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