Detection of faecal Cryptosporidium parvum antigen in diarrheic Holstein dairy cows
- Author:
Badiei, K.*
;
Pourjafar, M.
;
Ghane, M.
- Publication Type:Journal Article
- From:Tropical Biomedicine
2011;28(2):382-388
- CountryMalaysia
- Language:English
-
Abstract:
Over a one-year period, based on a random cluster sampling design, 661 faecal
samples from natural cases of diarrheic calves were taken in Fars province of Iran. The
samples were taken from the 267 diarrheic calves of high and 394 diarrheic calves of average
producing Holstein dairy cows. Faecal samples were collected directly from the rectum.
Herd selection was based on geographical location and density of cattle in the region.
Samples were collected based on 5 percent of herd population in 4 geographical regions:
North, West, East and South of Fars province. The herds were stratified into small, medium
and large size. Laboratory investigation consisted of a direct identification test for antigen of
Cryptosporidium parvum. All herds had HPDC and APDC Cryptosporidium-infected diarrheic
calves in their population. Diarrheic Cryptosporidium infected HPDC calves in southern
region of Fars province were at much lower risk (P<0.05) than APDC calves. The rate of
Cryptosporidium infection in diarrheic APDC calves in southern region of Fars province was
highest when compared to other geographical locations. When considering the effect of age,
diarrheic Cryptosporidium affected APDC Holstein calves of younger dams (>2 to 3years)
showed a higher rate of infection when compared to diarrheic HPDC Cryptosporidium
infected ones. There were no differences among the occurrence of Cryptosporidium infection
in diarrheic HPDC and APDC calves of different herd size groups.
- Full text:W020150615375909341779.pdf
