Page Banner

United States Department of Agriculture

Agricultural Research Service

Research Project: BITING ARTHROPODS: INTEGRATED PEST MANAGEMENT

Location: Mosquito and Fly Research Unit

Title: Microsporidian isolates from mosquitoes of Argentina

Authors
item Micieli, Maria -
item Andreadis, Theodore -
item Vossbrinck, Charles -
item Becnel, James
item Garcia, Juan -

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: May 7, 2012
Publication Date: N/A

Technical Abstract: Microsporidia are among the most common and widely distributed microbial pathogens associated with mosquitoes in nature. Since 1980 studies of microsporidia in mosquitoes of Argentina were conducted at the Laboratory of Insect Vectors of CEPAVE. Eleven morphologically unique species of microsporidia belonging to the genera Amblyospora (8), Parathelohania (2) and Hazardia milleri were isolated from species of Anopheles, Culex and Ochlerotatus, while eight species still remain under consideration. The complete life cycle including the phase in the adult mosquito, the larva and in the intermediate host has been elucidated in three species of Amblyospora and in one species of Parathelohania. Molecular data on the small subunit of the ribosomal gene of 5 species of Amblyospora were obtained to establish the affinity of these species to other described microsporidia of mosquitoes available from GenBank. SSU rDNA sequences obtained from these 5 species of microsporidia were unique when compared with GenBank entries. Phylogenetic tree constructed by Neighbor Joining analyses yielded high degree of congruence between parasite and host at the generic level. In this analysis A. camposi from Cx. renatoi clusters with other Amblyospora spp. from Culex mosquitoes, while A. albifasciati (Oc. albifasciatus) and A. criniferis (Oc. crinifer) group with other Amblyospora spp. from Aedes/Ochlerotaus mosquitoes. The positions of 2 microsporidia from Psorophora mosquitoes are unresolved. This is consistent with studies with microsporidia from other parts of the world and supports the hypothesis for coevolution between the microsporidia and its host mosquito at the generic level suggesting a degree of host-parasite co-speciation.

Last Modified: 10/25/2014
Footer Content Back to Top of Page