Loading…
Phylogeny, ultrastructure, histopathology and prevalence of Myxobolus oliveirai sp. nov., a parasite of Brycon hilarii (Characidae) in the Pantanal wetland, Brazil
This paper presents the morphological, histological and ultrastructural characteristics of Myxobolus oliveirai sp. nov., a parasite of the gill filaments in Brycon hilarii from the Brazilian Pantanal. Out of 216 B. hilarii specimens examined (126 wild and 90 cultivated), 38.1% of wild specimens (n =...
Saved in:
Published in: | Memórias do Instituto Oswaldo Cruz 2011-01, Vol.105 (6) |
---|---|
Main Authors: | , , , , , , , , |
Format: | Article |
Language: | |
Subjects: | |
Online Access: | Get full text |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Summary: | This paper presents the morphological, histological and ultrastructural
characteristics of Myxobolus oliveirai sp. nov., a parasite of the
gill filaments in Brycon hilarii from the Brazilian Pantanal. Out of
216 B. hilarii specimens examined (126 wild and 90 cultivated), 38.1%
of wild specimens (n = 48) were infected. The parasites form elongated
plasmodia primarily in the tip of gill filaments, reaching about 3 mm
in length. A thorough comparison with all the Myxobolus species
described from South American hosts, as well as nearly all the
Myxobolus species described so far is provided. Partial sequencing of
the 18S rDNA gene revealed a total of 1,527 bp. The Myxobolus species
parasite of B. hilarii did not match any of the Myxozoa available in
GenBank. In the phylogenetic analysis, M. oliveirai sp. nov. composed a
monophyletic group with eight other species: five species of Myxobolus
parasites of mugilid fishes, two parasites of pangasiid and one of
centrarchid. Infection prevalence values of the parasite revealed no
significant differences between wet and dry seasons or between males
and females. The importance of the infection to the farming of the host
species is emphasized. |
---|---|
ISSN: | 1678-8060 1678-8060 |