Prevalence of Chlamydia pecorum in Juvenile Koalas ( Phascolarctos cinereus ) and Evidence for Protection from Infection via Maternal Immunization

Chlamydia pecorum in koalas ( Phascolarctos cinereus) is considered a sexually transmitted infection. Analysis of samples from koala joeys (<1 yr) suggested that mother-to-young direct transmission was also occurring. Further, evidence suggested that joeys from vaccinated mothers were less likely to contract infections than joeys with unvaccinated mothers.