Sentence examples for level of external biosecurity from inspiring English sources
The herds in this study had a high level of external biosecurity, as well as good internal biosecurity.
It can be concluded that middle-sized to large Swedish farrow-to-finish systems have a high level of external biosecurity, and a good internal biosecurity.
bSPF, or Specific Pathogen Free farms, is a trademark of pig farms which ensures a certain level of external biosecurity through the restriction of entering visitors, equipment, feed and pigs.
The spread of such virus lineages across multiple farms is consistent with virus dispersal by breaches of external biosecurity measures, including the manner of swine transportation, although this remains unproven given the small sample size.
Hence, the results have a high level of external validity.
Subcategories regarding external biosecurity are: "Purchase of animals and semen"; "Transport of animals and removal of manure and dead animals"; "Feed, water and equipment supplies"; "Personnel and visitors"; "Vermin and bird control"; and "The environment and region".
Further details are presented in Additional file 3. To summarize, the results of this study show that improvements in external biosecurity can be made regarding transport of animals and feed, e.g. by arranging a separate loading area and implementing a stricter policy for farmer and staff entering the farm.
A risk assessment tool could be helpful in developing skills in risk-based prioritisation of external farm biosecurity measures among veterinary practitioners and achieving a trustful dialogue with farmers on biosecurity.
Additional file 1: Answers by 60 Swedish farrow-to-finish herds to questions regarding the external biosecurity subcategory "Purchase of animals and semen".
In previous work by this research group, two-step cluster analysis identified three external biosecurity groups using a different subset of variables from the same dataset [ 6].
External biosecurity aims to keep transmissible pathogens out of the herd, while internal biosecurity prevents the spread of disease, mainly from older to younger animals within the herd [ 2].
