THE AGE-RELATED CRYPTOSPORIDIUM SPECIES DISTRIBUTION IN ASYMPTOMATIC CATTLE FROM NORTH-WESTERN SPAIN

The Age-Related Cryptosporidium Species Distribution in Asymptomatic Cattle from North-Western Spain

The Age-Related Cryptosporidium Species Distribution in Asymptomatic Cattle from North-Western Spain

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An age-related distribution of Cryptosporidium species has been reported in cattle, with C.parvum being predominant in suckling calves, C.bovis and C.ryanae being predominant in post-weaned calves and C.andersoni being predominant in adults.

However, variants to this pattern have recently been reported.Thus, fecal samples (n = 594) from asymptomatic cattle were collected in north-western Spain.Animals were classified as 2 years (G5).Cryptosporidium detection and species identification were performed by SSU rRNA PCR.Individual Cryptosporidium prevalence was 16.

7%; it significantly decreased with age.Cryptosporidium parvum was predominant in Hair Gel G1 and C.bovis was predominant in the rest of the age classes; C.bovis and C.ryanae were especially prevalent in G2 and G3.

Cryptosporidium occultus was not found in suckling calves.Finally, C.andersoni and C.xiaoi 8-06 N were occasionally detected in G5.The presence of C.

parvum in all age classes implies significant animal and public health concerns.The predominance of C.bovis in cattle older than 1 month supports the idea that the age-related pattern of Cryptosporidium species described in cattle is not fully consistent, and thus further studies are still needed to identify those factors determining the species distribution.

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