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The fine structure of Garnia gonadati and its association with the host cell

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Abstract

Most of the studies on the fine structure of protozoa of the Apicomplexa group have been carried out with members of the Toxoplasma, Eimeria, and Plasmodium genera. In the present study we analyzed the fine structure of Garnia gonadoti parasitizing the red blood cells of the Amazonian reptile Gonatodes humeralis (Reptilia: Lacertilia). Transmission electron microscopy of thin sections showed that G. gonadoti presented all structures characteristic of the group, including the apicoplast. However, four special features were observed: (1) absence of the hemozoin (malarial) pigment; (2) a group of microtubules associated with the mitochondrion; (3) a vacuole containing electron-dense material, which resembled the acidocalcisome described in trypanosomatids; and (4) a special array of the host-cell endoplasmic reticulum around the parasitophorous vacuole.

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Authors and Affiliations

  1. Laboratório de Ultraestrutura Celular Hertha Meyer, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, CCS, Bloco G, Ilha do Fundão, 21941-900 Rio de Janeiro-RJ, Brazil e-mail: wsouza@biof.ufrj.br Tel.: +55-21-2602364; Fax: +55-21-2808193, , , , , , BR

    Wanderley de Souza

  2. Unidade de Microscopia Eletrônica, Instituto Evandro Chagas, Belem, Pará, Brazil, , , , , , BR

    José Antonio Picanço Diniz

  3. Departamento de Patologia, Centro de Ciências Biológicas, Universidade Federal do Pará, Belém, Pará, Brazil, , , , , , BR

    Edilene Oliveira Silva

  4. Laboratório de Coccídeos, Instituto Evandro Chagas, Belém, Pará, Brazil, , , , , , BR

    Ralph Lainson

Authors
  1. José Antonio Picanço Diniz
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  2. Edilene Oliveira Silva
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  3. Ralph Lainson
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  4. Wanderley de Souza
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Received: 4 January 2000 / Accepted: 30 May 2000

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Diniz, J., Silva, E., Lainson, R. et al. The fine structure of Garnia gonadati and its association with the host cell. Parasitol Res 86, 971–977 (2000). https://doi.org/10.1007/PL00008528

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  • DOI: https://doi.org/10.1007/PL00008528

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