Volume 29, Issue 3
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645



Investigations on pathogens and parasites in larval blackflies in and near the Guatemalan areas of endemic onchocerciasis were made from September 1978 to March 1979. Two mermithids ( sp. and sp.), eight microsporidans (, two spp., and two spp.), a fungus ( sp.) and two viruses (iridescent virus and cytoplasmic polyhedrosis virus) were found. Mermithids, microsporidans, and fungi infected, respectively 2.4, 1.2, and 0.2% of 23,346 blackfly larvae. Nineteen of 23 simuliid species examined harbored one or more groups of parasites. Mermithids infected one species of , one of , and eight of , Microsporidans parasitized one species of and 13 of , while sp. infected one of and four of . Iridescent virus infection was recognized in three species of , and cytoplasmic polyhedrosis virus only in . Mermithid, microsporidan, and fungal infection levels for the three onchocerciasis vectors varied considerably. did not harbor mermithids, whereas and frequently did so, with incidences of 8.9% in 27 of 51 habitats and 4.9% in 11 of 32 habitats, respectively. Microsporidan infections (always at low incidence) were found in all three vectors. Microsporidiosis was rare in but common in and . Fungal infection was found in 0.04% of but not in the other two species.


Article metrics loading...

The graphs shown below represent data from March 2017
Loading full text...

Full text loading...


Most Cited This Month

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error