Desquesnes M., Ravel Sophie, Deschamps J.Y., Polack B., Roux F. (2012). Atypical hyperpachymorph Trypanosoma (nannomonas) congolense forest-type in a dog returning from Senegal. Parasite, 19 (3), p. 239-247. ISSN 1252-607X.
Titre du document
Atypical hyperpachymorph Trypanosoma (nannomonas) congolense forest-type in a dog returning from Senegal
Année de publication
2012
Auteurs
Desquesnes M., Ravel Sophie, Deschamps J.Y., Polack B., Roux F.
Source
Parasite, 2012,
19 (3), p. 239-247 ISSN 1252-607X
Trypanosoma congolense forest-type was identified by PCR in France, in a dog returning from Senegal. This paper describes the morphological features of the parasite on Giemsa-stained smears. Slender forms and "latent bodies" represent 30.4 % and 20.4 %, respectively. Some rosettes have been observed (0.8 %). The predominant form (48.4 %) is stumpy, close to "montgomeryi-form", but it is unusually broad, with a width/length ratio (WLr) of 0.40-0.55, while that of "montgomeryi-forms" is close to 0.3. To the best of our knowledge, this is the first description of such a form of T. (Nannomonas). Also unusual, the shape of the cytoplasm appears to be tightened by an "S-" or "C-" shaped flagellum. We propose naming this peculiar morphotype "hyperpachymorph", and adding its description to that of T congolense forest-type. Thus T (Nannomonas) forms would include: sphaeromorph or "latent body-form" (globular), hyperleptomorph (rodhaini-form, very long and slender, with a free flagellum); leptomorph (simiae-form, slender, with a free flagellum); isomorph (congolense-form, short, generally without a free flagellum); pachymorph (montgomeryi-form, short and stout; 0.25 < WLr < 0.34, without a free flagellum), and hyperpachymorph ("hyper-montgomeryi-form", short and very stoat; 0.35 < WLr < 0.7, without a free flagellum).
Plan de classement
Entomologie médicale / Parasitologie / Virologie [052]
;
Sciences du monde animal [080]
Description Géographique
FRANCE ; SENEGAL
Localisation
Fonds IRD [F B010057333] ;
Montpellier (Centre IRD)
Identifiant IRD
fdi:010057333
