【Detection purpose】 Feline parvovirus (FPV) can cause severe infectious diseases in cats. The general clinical manifestations are high fever, diarrhea, vomiting and other symptoms, with high mortality, high infectivity and short course of disease, especially in young cats with higher infection rate and mortality. Detection of FPV antibody in cats can reflect the body's immune status. Feline calicivirus (FCV) infection is a feline viral respiratory tract infectious disease, the general clinical manifestations of the main manifestations of the upper respiratory tract symptoms, that is, mental depression, serous and mucinous rhinorrhea, conjunctivitis, stomatitis, tracheitis, bronchitis, accompanied by bipolar fever. Feline calicivirus infection is a frequent disease of cats, with high incidence and low mortality. Detection of FCV antibody in cats can reflect the body's immune status. Feline herpesvirus type I (FHV) is the pathogen of feline infectious nasal bronchitis and belongs to the herpesvirus a subfamily of herpesaceae. General clinical manifestations: at the beginning of the disease mainly manifested as symptoms of upper respiratory tract infection, the sick cat appeared depressed spirit, anorexia, increased body temperature, cough, sneezing, tears, eyes and nose secretion, secretion began to be serous, with the aggravation of the disease into purulent. Some cats have mouth ulcers, pneumonia and vaginitis, and some have skin ulcers. The disease is a serious hazard to young cats, if not treated timely mortality rate can reach more than 50%. Detection of FHV antibody in cats can reflect the body's immune status. Clinical significance: 1) for pre-immunization evaluation; 2) antibody titer detection after immunization; 3) early detection and diagnosis of cat fever, herpes simplex and goblet virus infection.