Development of Hepatozoon caimani (Carini, 1909) Pessôa, De Biasi & De Souza, 1972 in the Caiman Caiman c. crocodilus, the Frog Rana catesbeiana and the Mosquito Culex fatigans
The sporogony of Hepatozoon caimani has been studied, by light microscopy, in the mosquito Culex fatigans fed on specimens of the caiman Caiman c. crocodilus showing gametocytes in their peripheral blood. Sporonts iniciate development in the space between the epithelium of the insect gut and the ela...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2003 |
| País: | Brasil |
| Institución: | Instituto Nacional de Pesquisas da Amazônia (INPA) |
| Repositorio: | Repositório Institucional do INPA |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio:1/14539 |
| Acceso en línea: | https://repositorio.inpa.gov.br/handle/1/14539 |
| Access Level: | acceso abierto |
| Palabra clave: | Alligator Animals Model Animals Tissue Controlled Study Feeding Frog Gametocyte Hepatozoon Caimani Host Parasite Interaction Intestines Kidney Leech Life Cycle Liver Lizard Lung Microscopy Mosquito Nonhuman Oocyte Parasite Parasite Development Parasite Transmission Parasitosis Spleen Sporogenesis Stomach Animals Animals Parasitosis Apicomplexa Blood Cell Culex Disease Transmission Frogs And Toads Growth, Development And Aging Parasitology Animalsia Anura Caiman Caiman Crocodilus Caiman Yacare Hepatozoon Hirudinida Insecta Leptodactylus Leptodactylus Fuscus Melanosuchus Niger Neusticurus Bicarinatus Rana Catesbeiana Squamata Alligators And Crocodiles Animal Hemocytes Life Cycle Stages Protozoan Infections, Animals |
| Sumario: | The sporogony of Hepatozoon caimani has been studied, by light microscopy, in the mosquito Culex fatigans fed on specimens of the caiman Caiman c. crocodilus showing gametocytes in their peripheral blood. Sporonts iniciate development in the space between the epithelium of the insect gut and the elastic membrane covering the haemocoele surface of the stomach. Sporulating oocysts are clustered on the gut, still invested by the gut surface membrane. Fully mature oocysts were first seen 21 days after the blood-meal. No sporogonic stages were found in some unidentified leeches fed on an infected caiman, up to 30 days following the blood-meal. When mosquitoes containing mature oocysts were fed to frogs (Leptodactylus fuscus and Rana catesbeiana), cysts containing cystozoites developed in the internal organs, principally the liver. Feeding these frogs to farm-bred caimans resulted in the appearance of gametocytes in their peripheral blood at some time between 59 and 79 days later, and the development of tissue cysts in the liver, spleen, lungs and kidneys. Transmission of the parasite was also obtained by feeding young caimans with infected mosquitoes and it is suggested that both methods occur in nature. The finding of similar cysts containing cystozoites in the semi-aquatic lizard Neusticurus bicarinatus, experimentally fed with infected C. fatigans, suggests that other secondary hosts may be involved. |
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