Naturally occurring strains ofSalmonella paratyphi Bunable to form adhesive (type-1) fimbriae

Abstract

SUMMARYThe production of MSHA+(type-1 fimbriate) recombinants was observed in transductional crosses between different pairs of naturally occurring strains ofSalmonella paratyphi B. MSHA+recombinants were readily produced in transductions from MSHA+donor strains to MSHA−(type-2 fimbriate or non-fimbriate) recipient strains, and less frequently between some pairs of MSHA−strains. The genetic evidence suggests that there are at least three different clones among MSHA−strains ofS. paratyphi B. Relationships between the different strains and their possible origins are discussed.