borrelia microtti and borrelia persica are two iranian strains of spirochetes whose vectors are ornithodorous tholozani and ornithodorous erraticus which are responsible for relapsing fever. bsk medium has been used for in vitro culture of other strains of borrelia, although the two mentioned strains could not be successfully cultured in it. we have modified bsk medium by using guinea pig and f...

chromosomal patterns of experimental animals are useful tools for cytogenetics research and animal breeding. chromosome investigations of the hairless guinea pig are rare, therefore, karyotype of hairless guinea pigs (twelve male and female) was studied using metaphase spreads of bone marrows and g banding techniques. the chromosomes diploid number was 2n= 64 and polymorphism of three type chro...