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Abstract
The prevalence of Cryptosporidium and Giardia infections in pigs was investigated
by the use of a direct immunofluorescence assay on two Ohio farms with different management
systems. Cryptosporidium and Giardia infections were detected only in weanlings on
the farm with slotted and wire floors, but in both weanlings and nursing piglets on
the farm with porous concrete floors. Giardia infection was also detected in sows
on the latter farm. The farm with porous concrete floors had a significantly higher
Cryptosporidium infection rate in nursing piglets and Giardia infection rates in weanlings
than the farm with slotted and wire floors. Sows were implicated as the source of
both Cryptosporidium and Giardia infections for nursing piglets.