Avian gastric yeast is caused by Macrorhabdus ornithogaster, formerly known as “megabacteria,” a Gram-positive yeast that affects parrots (psittacines), most commonly budgerigars, and non-psittacine birds such as finches.
Symptoms are non-specific such as a “fluffed” bird, regurgitation, vomiting, loose stools, anorexia, chronic weight loss, emaciation, melena, anemia, and sometimes sudden death.
Other conditions that cause similar clinical signs include Trichomoniasis, proventricular dilatation disease, Chlamydiosis (parrot fever), foreign body, and mycobacterium infection (finches and canaries).
Diagnosis is made by microscopic examination of feces or DNA probe by PCR. X-rays may be recommended to rule out other gastrointestinal diseases. Necropsy should be performed in the event of sudden unexplained deaths.
Treatment consists of prescription antifungals along with the addition of apple cider vinegar to drinking water. Supportive care should be provided based on patient condition.
Prognosis is good with early diagnosis and treatment.
Recheck examination recommended at 14 days or sooner if problems with a recheck fecal test at end of treatment to assure resolution of the infection.
Copyright © All Rights Reserved
