| molecular epidemiological confirmation and circumstances of occurrence of sheep (s) strains of mycobacterium avium subsp. paratuberculosis in cases of paratuberculosis in cattle in australia and sheep and cattle in iceland. | distinct strains of mycobacterium avium subsp. paratuberculosis with a tendency to segregate in either sheep, or cattle and other ruminants, have been described and are known as s and c strains, respectively. these strains can be distinguished by a polymorphism in the is1311 element and other dna-based methods. c strains are relatively easy to culture from tissues and faeces of animals with paratuberculosis but s strains are difficult to culture. a retrospective survey of archival formalin-fixed ... | 2001 | 11267791 |