Viability and infectiousness of eggs of Echinococcus granulosus aged under natural conditions of inferior arid climate.
We studied the viability and infectiousness of aged Echinococcus granulosus eggs by in vivo evaluation in ovines. Our results demonstrated that after 41 months of ageing of the eggs under environmental conditions of an inferior arid climate (Patagonia, Argentina), they were still able to produce infection in 4/4 ovines challenged with 1200 eggs per ovine. In the ovines experimentally infected with these aged eggs, the occurrence of hepatic and pulmonary cysts was determined by necropsy, histologic and genetic studies. The eggs were found in a semi-senescent stage, thus keeping their capacity to generate an infection in the intermediary ovine host.
Departamento de Bioquímica, School of Natural Science, Facultad de Ciencias Naturales, Universidad Nacional de la Patagonia San Juan Bosco, Piso 2 Ciudad Universitaria Km. 4, Comodoro Rivadavia, Chubut 9000, Argentina. psanchez@unpata.edu.ar
Paula Sánchez
PS
Thevenet
Oscar
O
Jensen
Ricardo
R
Drut
Gloria E
GE
Cerrone
María S
MS
Grenóvero
Héctor M
HM
Alvarez
Héctor M
HM
Targovnik
Juan A
JA
Basualdo
D000818:Animals; D001118:Argentina; D018509:DNA, Helminth / Q000737:chemistry / Q000235:genetics; D003889:Desert Climate; D004443:Echinococcosis / Q000469:parasitology / Q000473:pathology / Q000662:veterinary*; D048209:Echinococcus granulosus / Q000235:genetics / Q000254:growth & development / Q000472:pathogenicity*; D008099:Liver / Q000469:parasitology; D008168:Lung / Q000469:parasitology; D010063:Ovum / Q000254:growth & development; D016133:Polymerase Chain Reaction / Q000662:veterinary; D012756:Sheep; D012757:Sheep Diseases / Q000469:parasitology* / Q000473:pathology
D018509:DNA, Helminth