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Host specificity and age-dependent resistance to Cryptosporidium avium infection in chickens, ducks and pheasants

N. Holubová, B. Sak, L. Hlásková, D. Květoňová, V. Hanzal, D. Rajský, M. Rost, J. McEvoy, M. Kváč,

. 2018 ; 191 (-) : 62-65. [pub] 20180628

Language English Country United States

Document type Journal Article

Persistent link   https://www.medvik.cz/link/bmc18033024

Host- and age-specificity of Cryptosporidium avium were studied in 1-, 21- and 365-day-old chickens (Gallus gallus), domestic ducks (Anas platyrhynchos) and ring-necked pheasants (Phasianus colchicus) under experimental conditions. Cryptosporidium avium was not infectious for ring-necked pheasants, but it was infectious for ducks and chickens at all age categories. The course of infection in ducks did not differ among age categories, but 365-day-old chickens had less severe infections than 1- and 21-day-old chickens. The patent period in chickens and ducks was >30 DPI, but ducks started to shed oocysts of C. avium earlier (5-6 DPI) and at a lower intensity (accumulated value of infection intensity of 58,000-65,000 OPG) than chickens (9-11 DPI and accumulated value of infection intensity of 100,000-105,000 OPG). Experimentally infected birds showed no clinical signs of cryptosporidiosis.

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$a Rost, Michael $u Faculty of Economics, University of South Bohemia in České Budějovice, Czech Republic.
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$a Kváč, Martin $u Biology Centre, Czech Academy of Sciences, Institute of Parasitology, České Budějovice, Czech Republic; Faculty of Agriculture, University of South Bohemia in České Budějovice, Czech Republic. Electronic address: kvac@paru.cas.cz.
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