Cat flu
Cat flu, or feline upper respiratory disease, is a contagious disease complex (can include multiple pathogens) primarily caused by feline herpesvirus type-1 (FHV-1) and feline calicivirus (FVC), with secondary bacterial infections such as Bordetella bronchiseptica and Chlamydia felis sometimes contributing to clinical signs. Other common respiratory pathogens include Mycoplasma felis and Streptococcus zooepidemicus.