The present study assumed that, other things being constant, decrease in the occurrence of cattle rustling and positive perceived impact of migration would yield more herd size.
Although, the occurrence of cattle dung was very concentrated in some spots of the field and thus future studies should address strategies to improve spatial distribution of cattle dung input.
This may indicate that the occurrence of cattle carrying VTEC O157 H7 is correlated to the geographical distribution of the cattle population.
The very rare prevalence of TME may be partially due to the rare occurrence of cattle TSEs that enter the mink diet (8, 29 ).
(i) A cattle diagnostic marker-based method, using cattle mtDNA sequences and cattle-specific alleles at microsatellite loci of ILSTS013, ILSTS050 and SPS115, was used to assess the frequency of occurrence of cattle introgression in domestic yak populations at the population level.
However, no study has reported so far the use of genetic markers to assess the occurrence, frequency and importance of cattle introgression in individual yak or in domestic yak populations across the geographical range of the species.
Since cattle and small ruminants have been responsible for most human Brucellosis occurrences [ 36], the densities of cattle and small ruminants in 2005, with a resolution of 5×5 km, were obtained from the Food and Agriculture Organization (FAO) of the United Nations and resampled to 1×1 km.
Also, the ownership of large number of cattle and the occurrence of droughts and diseases influences pastoralists' decision to migrate.
In the 1980's, an Australian postal survey recorded that 81% of cattle owners reported the occurrence of IBK in their herds and 75% observed a reduction in weight gain of the affected cattle [ 9].
The co-occurrence of hemorrhaging in the intestinal tract of cattle with the consumption of T-2 or fumonisin contaminated feeds suggests that the mycotoxins could be a factor in the development of JHS.
