Loma camerounensis sp. nov. (Protozoa:Microsporida) a parasite of Oreochromis niloticus Linnaeus, 1757 (Teleost:Cichlidae) in fish-rearing ponds in Melen, Yaoundé, Cameroon.
A new microsporidian, Loma camerounensis, was found in the Cichlidae Oreochromis niloticus from the Melen fish-rearing station in Yaoundé, Cameroon. Xenomas were located in the gut from the oesophagus to the intestine, but preferentially in the duodenum. Dimensions of the fresh spores were 3.96 x 2.16 microns. The ultrastructural study indicated the following characteristics: parasite stages arranged in a random, unstratified manner in the xenoma; merogony by multiple fission; sporogonic stages isolated within a sporophorous vesicle containing several sporoblasts and polysporoblastic sporogony. Ultimately the spores appeared to be isolated in a single vesicle, but this was a secondary phenomenon induced by the intervention of tubules that resolved in partitions of the initial sporophorous vesicle.
Fomena
A
A
Laboratoire de Biologie Générale, Faculté des Sciences, Université du Cameroun, Yaoundé.
Coste
F
F
Bouix
G
G
D000818:Animals; D002163:Cameroon; D004064:Digestive System / Q000469:parasitology; D004386:Duodenum / Q000469:parasitology; D005393:Fish Diseases / Q000469:parasitology*; D005398:Fisheries; D007411:Intestinal Diseases, Parasitic / Q000469:parasitology / Q000662:veterinary*; D008854:Microscopy, Electron; D008855:Microscopy, Electron, Scanning; D016816:Microsporida / Q000254:growth & development / Q000648:ultrastructure*; D016881:Microsporidiosis / Q000469:parasitology / Q000662:veterinary*; D010471:Perches / Q000469:parasitology*; D013170:Spores / Q000648:ultrastructure