Issue |
Parasite
Volume 6, Number 3, September 1999
|
|
---|---|---|
Page(s) | 209 - 215 | |
DOI | https://doi.org/10.1051/parasite/1999063209 | |
Published online | 12 September 2014 |
Mémoire
Garnia karyolytica n. sp. (Apicomplexa: Haemosporina: Garniidae), a blood parasite of the Brazilian lizard Thecodactylus rapicaudus (Squamata: Gekkonidae)
Garnia karyolytica n. sp. (Apicomplexa : Haemosporina : Garniidae) parasite du sang du lézard brésilien Thecodactylus rapicaudus (Squamata : Gekkonidae)
1
Department of Parasitology, Instituto Evandro Chagas, Caixa Postal 1128, Belém, Pará, Brazil.
2
Instituto Nacional de Pesquisa da Amazonia, Caixa Postal 478, Manaus, Amazonas, Brazil.
* Correspondence : Ralph Lainson. Tel. : (55.91) 211.4453 - Fax : (55.91) 226.1284.
Received:
6
April
1999
Accepted:
29
May
1999
Development of meronts and gametocytes of Garnia karyolytica nov.sp., is described in erythrocytes of the neotropical forest gecko Thecodactylus rapicaudus from Para State, north Brazil. Meronts are round to subpherical and predominantly polar in position: forms reaching 12.0 x 10.0 μm contain from 20-28 nuclei. Macrogametocytes and microgametocytes are predominantly elongate, lateral in the erythrocyte and average 16.6 x 6.3 μm and 15.25 x 6.24 μm respectively. Occasional spherical forms of both sexes occur in a polar or lateropolar position. All stages of development are devoid of malarial pigment. They have a progressively lytic effect on the host-cell nucleus, particularly the mature gametocytes, which enlarge and deform the erythrocyte. Possible vector(s) of garniid parasites are considered, and phlebotomine sandflies are high on the list of suspects.
Résumé
Description du développement des mérontes et des gamétocytes de Garnia karyolytica n. sp., parasite des érythrocytes du gecko de forêts néotropicales Thecodactylus rapicaudus, capturé dans l'état de Pará (Nord Brésil). Les mérontes, arrondis à subsphériques le plus souvent en position polaire, mesurent 12,0 x 10,0 μm et contiennent 20 à 28 noyaux. Les macrogamétocytes et les microgamétocytes sont le plus souvent allongés, en position latérale dans l'hématie et mesurent en moyenne respectivement 16,6 x 6,3 μm et 15,25 x 6,24 μm. Parfois des formes sphériques des deux sexes se trouvent en position polaire ou subpolaire. Tous les stades de développement sont dépourvus de pigment malarique. Les parasites ont une action lytique progressive sur le noyau de la cellule hôte et particulièrement les gamétocytes mûrs qui hypertrophient et déforment l'érythrocyte. Divers arguments font supposer que les phlébotomes pourraient être les vecteurs des Garniidae.
Key words: Protozoa / Garnia karyolytica n. sp. / haemosporine / Thecodactylus rapicaudus / gekkonid lizard / Brazil
Mots clés : Protozoa / Garnia karolytica n. sp. / Haemosporina / Thecodactylus rapicaudus / Gekkonidae / Brésil
© PRINCEPS Editions, Paris, 1999, transferred to Société Française de Parasitologie
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