The four PCR respiratory tests include feline herpes virus, feline calicivirus, feline mycoplasma, and chlamydia psittaci. Among them, Chlamydia psittaci is a zoonotic disease screening. Feline herpesvirus, feline calicivirus, and feline mycoplasma are screening for reproductive lesions. ​​​​​​

Cats suffering from respiratory problems, such as sneezing, runny nose, cough, fever, increased eye secretions, conjunctivitis, red and swollen gums, oral ulcers, etc., it is recommended to perform four PCR tests on eye, nose and mouth secretions.