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The Journal of Infectious Diseases|April 1, 1976
Recognition of cyclic transmission of Sarcocystis muris by catsA Ruiz, J K Frenkel
The American Journal of Tropical Medicine and Hygiene|November 1, 1980
Human toxoplasmosis and cat contact in Costa RicaJ K Frenkel, A Ruiz
The American Journal of Tropical Medicine and Hygiene|November 1, 1980
Toxoplasma gondii in Costa Rican catsA Ruiz, J K Frenkel
The American Journal of Tropical Medicine and Hygiene|November 1, 1980
Intermediate and transport hosts of Toxoplasma gondii in Costa RicaA Ruiz, J K Frenkel
American Journal of Epidemiology|March 1, 1981
Endemicity of toxoplasmosis in Costa RicaJ K Frenkel, A Ruiz
The American Journal of Tropical Medicine and Hygiene|May 1, 1975
Soil survival of toxoplasma oocysts in Kansas and Costa RicaJ K Frenkel, A Ruiz, M Chinchilla
The Journal of Parasitology|August 1, 1977
Ultrastructure of the cyst of Sarcocystis murisH G Sheffield, J K Frenkel, A Ruiz
Toxicon : Official Journal of the International Society on Toxinology|January 1, 1984
[Ultrastructural study of the local changes induced in the white rat by the venom of Bothrops picadoi of Costa Rica]O Arroyo, L Cerdas
Revista De Biologia Tropical|November 1, 1988
[Reproductive cycles of the coral snake Micrurus nigrocinctus (Serpentes: Elapidae) in Costa Rica]A Solórzano, L Cerdas
Revista De Biologia Tropical|November 1, 1988
[Reproductive biology of the Central American rattlesnake Crotalus durissus durissus (Serpentes: Viperidae) in Costa Rica]A Solórzano, L Cerdas
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