dvm360 updates feline respiratory guidance

dvm360 on June 2 resurfaced clinical guidance telling veterinarians to separate feline upper respiratory tract disease into acute and chronic presentations before deciding on antibiotic treatment. The article said that step can simplify diagnosis and treatment because many acute cases are driven by viral infections, with bacteria often acting as secondary pathogens. (dvm360.com) The guidance was presented in a dvm360 piece summarizing recommendations from the Antimicrobial Guidelines Working Group of the International Society for Companion Animal Infectious Diseases. ### Why does the acute-versus-chronic split come first? The dvm360 guidance says feline upper respiratory tract disease should first be categorized as acute or chronic, because that distinction changes how clinicians interpret tests and whether antimicrobials are likely to help. (dvm360.com) Acute disease is defined as clinical signs present for 10 days or fewer, according to the article. The article says the most common infectious causes of acute feline upper respiratory tract disease are feline herpesvirus 1 and feline calicivirus, and those viral infections can be complicated by secondary bacterial infections. That framing is central to the antibiotic question: the bacterial component may be treated, but the underlying syndrome is often not primarily bacterial. (dvm360.com) ### What signs are vets being told to look at first? dvm360 listed serous or mucopurulent nasal discharge, sneezing, epistaxis and conjunctivitis among the clinical signs seen with feline upper respiratory tract disease. The article presents those signs as part of the initial clinical picture before a veterinarian decides whether the case looks acute, chronic, mild or more severe. (dvm360.com) The guidance also says chronic and recurrent cases should not be managed with repeated regular empirical antibiotic treatment. Instead, for cats with chronic, recurrent signs, the recommendation is to use a previously effective antimicrobial rather than defaulting to routine repeat prescribing. (dvm360.com) ### Which tests does the article say are less useful in acute cases? The dvm360 article says nasal cytology and bacterial cultures are often performed in acute cases, but the guideline authors do not recommend them routinely. The reason given is that results can be hard to interpret because of commensal organisms or false-negative findings. (dvm360.com) That point matters because it shifts the early decision away from reflex testing and toward clinical triage. The article describes the acute-chronic split as a way to simplify treatment choices rather than adding steps that may not clarify whether antibiotics are needed. (dvm360.com) ### When does the guidance support changing antibiotics? The dvm360 summary says that if treatment is ineffective after 48 hours of therapy, clinicians should consider switching to an antimicrobial in a different drug class. The recommendation appears in the article’s discussion of chronic, recurrent disease and previously effective therapy. (dvm360.com) The same piece also warns against repeated empirical treatment in those chronic cases. In practice, the article’s approach is narrower than routine prescribing: classify the case, avoid low-yield testing in many acute presentations, and reserve antibiotic changes for cases that are not responding. (dvm360.com) ### Where did this guidance come from? The dvm360 article says it is the first in a three-part series summarizing antimicrobial recommendations for dogs and cats with respiratory tract disease. Those recommendations were developed by the Antimicrobial Guidelines Working Group of the International Society for Companion Animal Infectious Diseases, according to the piece. (dvm360.com) The June 2 article remains available on dvm360’s website under its coverage of feline upper respiratory tract disease and antibiotic use. (dvm360.com)