Serological evidence of B. quintana infection showed, of hospitalized homeless patients, 16% were infected, as opposed to 1.8% of nonhospitalized homeless persons, and 0% of blood donors at large.
As probas serolóxicas da infección por B. quintana en pacientes hospitalizados sen fogar mostraron que un 16% estaban infectados, a diferenza do 1,8% das persoas sen fogar non hospitalizadas, e o 0% dos doantes de sangue totais.