Mathews, Patrick D.
Tavares, Luiz E. R.
Silva, Marcia R. M.
Maia, Antonio A. M.
Total Authors: 6
 Univ Sao Paulo, Fac Anim Sci & Food Technol, Dept Basic Sci, BR-13635900 Pirassununga, SP - Brazil
 Univ Sao Paulo, Inst Biosci, Dept Zool, Rua Matao Trav 14, 101, BR-05508090 Sao Paulo, SP - Brazil
 Univ Fed Sao Paulo, Paulista Sch Med, Dept Biophys, BR-04023062 Sao Paulo - Brazil
 Univ Fed Mato Grosso do Sul, Lab Anim Parasitol, BR-79070900 Campo Grande - Brazil
Total Affiliations: 4
Web of Science Citations:
Molecular data of Henneguya chydadea Barassa, Cordeiro and Arana, 2003, found in the gill filaments of Astyanax lacustris bred in fish farm in the State of Mato Grosso do Sul, Brazil was obtained in order to estimate their phylogenetic position among other platysporines myxosporean. The prevalence of the parasite was 28.1% and the range intensity was 1-3 plasmodia per fish. The shape and measurements of mature myxospores were consistent with the characteristics previously defined to H. chydadea. The SSU rDNA sequence of the myxospores of H. chydadea resulted in a total of 1405 nucleotides, and this sequence did not match any of the myxozoan available in the GenBank. Phylogenetic analysis showed H. chydadea within the Glade of histozoic myxosporeans and closed together with Henneguya rotunda and Myxobolus pantanalis reported in the gill arch and fins and gill filaments of Salminus brasiliensis respectively. Nonetheless, the SSU rDNA sequences of H. chydadea, H. rotunda and M. pantanalis have only 85.2% and 84.4% similarity, respectively. This is the first molecular study of a Henneguya species that parasitizes a fish belonging to the genus Astyanax in South America. The importance of myxosporeans introduction to new locations along with infected cultured host is emphasized. (AU)