Journal
EMERGING INFECTIOUS DISEASES
Volume 21, Issue 5, Pages 789-796Publisher
CENTERS DISEASE CONTROL
DOI: 10.3201/eid2105.142011
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- Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health
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In southern California, ocular infections caused by Onchocerca lupi were diagnosed in 3 dogs (1 in 2006, 2 in 2012). The infectious agent was confirmed through morphologic analysis of fixed parasites in tissues and by PCR and sequencing of amplicons derived from 2 mitochondrially encoded genes and 1 nuclear-encoded gene. A nested PCR based on the sequence of the cytochrome oxidase subunit 1 gene of the parasite was developed and used to screen Simullum black flies collected from southern California for O. lupi DNA. Six (2.8%; 95% Cl 0.6%-5.0%) of 213 black flies contained O. lupi DNA. Partial mitochondril 16S rRNA gene sequences from the infected flies matched sequences derived from black fly larvae cytotaxonomically identified as Simulium tribulatum. These data implicate S. tribulatum flies as a putative vector for O. lupi in southern California.
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