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Epidemiologic significance of Toxoplasma gondii infections in turkeys, ducks, ratites and other wild birds: 2009–2020

Published online by Cambridge University Press:  19 October 2020

J. P. Dubey Open the ORCID record for J. P. Dubey [Opens in a new window] ,
F. H. A. Murata ,
C. K. Cerqueira-Cézar ,
O. C. H. Kwok  and
C. Su
J. P. Dubey*
Affiliation:
United States Department of Agriculture, Agricultural Research Service, Animal Parasitic Diseases Laboratory, Beltsville Agricultural Research Center, Building 1001, Beltsville, MD20705-2350, USA
F. H. A. Murata
Affiliation:
United States Department of Agriculture, Agricultural Research Service, Animal Parasitic Diseases Laboratory, Beltsville Agricultural Research Center, Building 1001, Beltsville, MD20705-2350, USA
C. K. Cerqueira-Cézar
Affiliation:
United States Department of Agriculture, Agricultural Research Service, Animal Parasitic Diseases Laboratory, Beltsville Agricultural Research Center, Building 1001, Beltsville, MD20705-2350, USA
O. C. H. Kwok
Affiliation:
United States Department of Agriculture, Agricultural Research Service, Animal Parasitic Diseases Laboratory, Beltsville Agricultural Research Center, Building 1001, Beltsville, MD20705-2350, USA
C. Su
Affiliation:
Department of Microbiology, University of Tennessee, Knoxville, TN37996-0845, USA
*
Author for correspondence: J. P. Dubey, E-mail: jitender.dubey@ars.usda.gov
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Abstract

Toxoplasma gondii infections are common in humans and animals worldwide. Wild and domestic avian species are important in the epidemiology of T. gondii infections because felids prey on them and excrete millions of oocysts in the environment, disseminating the infection. Herbivorous birds are also excellent sentinels of environmental contamination with T. gondii oocysts because they feed on the ground. Toxoplasma gondii infections in birds of prey reflect infections in intermediate hosts. Humans can become infected by consuming undercooked avian tissues. Here, the authors reviewed prevalence, persistence of infection, clinical disease, epidemiology and genetic diversity of T. gondii strains isolated from turkeys, geese, ducks, ratites and avian species (excluding chickens) worldwide 2009–2020. Genetic diversity of 102 T. gondii DNA samples isolated worldwide is discussed. The role of migratory birds in dissemination of T. gondii infection is discussed.

Keywords

Birdsclinical diseaseepidemiologygenotypeoocystprevalenceToxoplasma gondii
Type
Review Article
Information
Parasitology , Volume 148 , Issue 1 , January 2021 , pp. 1 - 30
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Copyright
Copyright © The Author(s), 2020. Published by Cambridge University Press

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