Exact(18)
Here, m i and m j were respectively the number of animals in herd i and j.
If a herd i infects a herd j a distance r ij away with probability p(r ij ), on average herd i will infect the following number of herds [ 12]: R h i = 1 f c ∑ j p (r i j ), in which the summation is over all the herds j excluding herd i.
On the other hand, the CD of contrasts among herds i and j is obtained by using a vector c' null except a or a in the appropriate position corresponding to animals from herd i and j respectively.
By calculating R hi for each pig herd i in the country we are able to identify high-risk areas as areas spanned by groups of neighboring high-risk herds.
If in addition the set of all current locations (in a region) of herds with pigs is available, the estimated kernel can be used to measure the expected amount of neighborhood transmission by calculating a local reproduction ratio R hi for each herd i.
Using the calculational framework developed by Boender et al. [ 12], the availability of an estimated between-herd transmission probability p(r) allows one to calculate a measure for the expected amount of neighborhood transmission for each individual herd i, given by the local reproduction ratio R hi.
Similar(42)
There was a total of 126 SSP MAP-positive herds (i.e., 21.3% SSP MAP-positive herds; 95% confidence interval = 18.0 24.9); the within-herd apparent prevalence (AP) ranged between 0.00 and 22.73% (mean 6.07%).
Farmers who became farmer-herders could control local pasturelands and limit access to them (including to crop residues) except by their own herds, i.e. at the expense of mobile pastoralists' herds that will consequently only be able graze the non-arable margins of village territories.
The five most common pathogens in Danish dairy herds, i.e. Staph.
One inclusion criterion was BVDV-free dairy herds; i e. participation in the national BVD control program and declared free from BVDV.
In infected herds, i.e. confirmed by RT-PCR, more than 94% of the sheep and 99% of the cows tested seropositive.
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