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1.
Bol. malariol. salud ambient ; 44(2): 93-99, ago.-dic. 2004. mapas, tab
Article in Spanish | LILACS | ID: lil-409894

ABSTRACT

Se describe un brote epidémico de malaria de altura en la parroquia Guaramacal del estado Trujillo, Venezuela, área clasificada históricamente como originalmente sin malaria, cuya altitud alcanza hasta los 2.200 m snm, donde en Noviembre de 1999 se detectaron nueve casos de malaria, dos clasificados como casos introducidos y siete importados, encontrándose implicados cuatro especies del genero Anopheles del subgénero Kerteszia, identificados como Anopheles homunculus (n=27, 65,9 por ciento), Anopheles lepidotus (n=9, 21,9 por ciento), Anopheles neivai (n=3, 7,3 por ciento) y Anopheles pholidotus (n=2, 4,9 por ciento), de los cuales no existía evidencia anterior de su presencia en el área de transmisión ni en la entidad federal. El criadero más importante estuvo representado por bromeliáceas epifitas (Tillandsia spp). La presencia de casos introducidos fue ocasionada por las frecuentes migraciones de habitantes de La Laguneta, La Fernandera y Agua Fría, de la parroquia Guaramacal a la comunidad de San Juan de Dios del estado Portuguesa para el cultivo de maíz y yuca, existiendo para la época un brote epidémico de malaria en esa zona


Subject(s)
Animals , Malaria , Plasmodium vivax , Anopheles , Disease Vectors
2.
Mem. Inst. Oswaldo Cruz ; 87(1): 81-6, jan.-mar. 1992. tab
Article in English | LILACS | ID: lil-116286

ABSTRACT

Two lots of 20 young male guinea pigs were inoculated subcutaneously in the tarsi with 10 (elevated to fourth potency) amastigotes of Leishmania braziliensis or L. b. guyanensis to study the susceptibility of this Neotropical hystricomorph rodent the autochthonous parasites. Almost 50% of the animals showed lesions in the inoculation site and had parazitations that were infective to hamsters, as shown by inoculating homogenates of the dermal lesion, of the spleen, of the liver, and of the nasal mucosa into hamsters at 20, 40, 60 and 120 days after inoculation of the guinea pig. Smears of the above organs showed the presence of amastigotes. Parasites inoculated into the tarsi were detected early in the skin, spleen, and liver of the guinea pig host. Blood cultures made by cardiopuncture on sacrifice of the guinea pigs were uniformly negative. The nasal mucosa of nearly all animals positive in the skin or viscera was invaded early by the parasites, although with grater frequency between 60 and 120 days post-inoculation. The use of this model for the study of mucocutaneous parasitism by L. brasiliensis is discussed, together with the phenomena of parasitism at a distance from the inoculation site, the temperature of the body regions affected, and the possible genetic influence on susceptibility of the guinea pig to L. brasiliensis


Subject(s)
Animals , Disease Models, Animal , Disease Susceptibility , Leishmania braziliensis/isolation & purification , Leishmaniasis, Mucocutaneous/pathology , Nasal Mucosa/injuries , Swine/parasitology
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