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Am J Trop Med Hyg. 2016 Jun 1;94(6):1299-300. doi: 10.4269/ajtmh.15-0919. Epub 2016 Apr 4.

Follow-up of the 1977 Georgia Outbreak of Toxoplasmosis.

Author information

1
Parasitic Diseases Branch, Division of Parasitic Diseases and Malaria, Center for Global Health, Centers for Disease Control and Prevention, Atlanta, Georgia; Department of Ophthalmology, Akstein Eye Center, Riverdale, Georgia; Jules Stein Eye Institute, University of California, Los Angeles (UCLA), Los Angeles, California; Department of Ophthalmology, David Geffen School of Medicine, University of California, Los Angeles (UCLA), Los Angeles, California.
2
Parasitic Diseases Branch, Division of Parasitic Diseases and Malaria, Center for Global Health, Centers for Disease Control and Prevention, Atlanta, Georgia; Department of Ophthalmology, Akstein Eye Center, Riverdale, Georgia; Jules Stein Eye Institute, University of California, Los Angeles (UCLA), Los Angeles, California; Department of Ophthalmology, David Geffen School of Medicine, University of California, Los Angeles (UCLA), Los Angeles, California uveitis@jsei.ucla.edu.

Abstract

In 1977, an outbreak of toxoplasmosis occurred among 37 persons associated with exposure to an indoor horse arena. Cat feces containing the organism were most likely stirred up when horses ran on the dirt floor, and were inhaled or ingested by riders and observers. After 25 or more years, we attempted to locate persons from the outbreak and offer them an eye examination. Of the 37 persons in the outbreak, 18 (49%) were located; four had died, and the remaining 14 agreed to an examination. Among the 14 persons examined, three (21%) were found to have lesions typical of toxoplasmic retinochoroiditis. If these three persons were the only ones with ocular disease among the 37 persons in the outbreak, the disease rate would still be high (8%). As a result of exposure to Toxoplasma gondii during this outbreak, a relatively high percentage of persons developed ocular disease.

PMID:
27044565
PMCID:
PMC4889747
DOI:
10.4269/ajtmh.15-0919
[Indexed for MEDLINE]
Free PMC Article

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