objective(5) Feline infectious peritonitis(5) coronavirus(5) Infection(5) Result(5) transcriptase(4) performed(4) Feline coronavirus(4) quantitative PCR(4) virus(4) Transmission(4) RT-PCR(3) investigated(3) Probability(3) association(3) immunohistochemistry(3) serum(3) positive(3) Blood(3) FIP(3) Frequency(2) testicle(2) nine(2) initiated(2) had no(2) serology(2) FCoV infection(2) Viral load(2) Semen(2) Reinfection(2)