Ultrastructural study of the gametocytes and merogonic stages of Fallisia audaciosa (Haemosporina: Garniidae) that infect neutrophils of the lizard Plica umbra (Reptilia: Iguanidae) |
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Authors: | Silva Edilene O Diniz José Antonio P Lainson Ralph DaMatta Renato A de Souza Wanderley |
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Affiliation: | Laboratório de Parasitologia, Departamento de Patologia, Centro de Ciências Biológicas, Universidade Federal do Pará, Av. Augusto Corrêa s/n, Bairro Guamá, 66075-110 Belém, Pará, Brazil. edilene@ufpa.br |
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Abstract: | Little is known regarding the ultrastructure of the genus Fallisia (Apicomplexa: Haemosporina: Garniidae). This report describes the fine structure of some developmental stages of Fallisia audaciosa that infect neutrophils in the peripheral blood of the Amazonian lizard Plica umbra (Reptilia: Iguanidae). The parasites lie within a parasitophorous vacuole and exhibit the basic structures of members of the Apicomplexa, such as the pellicle and the cytostome. Invaginations of the inner membrane complex were seen in the gametocytes and may be concerned with nutrition. The meronts were irregularly shaped before division, a feature unusual among members of the Apicomplexa. The unusual presence of a parasitic protozoan within neutrophils, in some way interfering with or modulating the microbicidal activity of such cells, is discussed. |
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Keywords: | Fallisia audaciosa Garniidae lizard neutrophil Plica umbra ultrastructure |
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