Megabacteriosis in Nymphicus hollandicus

Abstract

Macrorhabdus ornithogaster, agent of yeast-like Megabacteriosis is found in the normal microbiota of the proventriculus of birds. Under non-specific conditions, the host-fungal balance is disrupted and clinical signs, called "Light Going Syndrome", manifest. M. ornithogaster has been diagnosed in the laboratory as a cause of disease in a wide diversity of bird species, with a prognosis reserved to depend on the case. This work presents a review of the literature on megabacteriosis in birds and reports a clinical case in Calopsita (Nymphicus hollandicus), a 1 year old Cara White male, where he was admitted to the Veterinary Clinic. Through history, anamnesis, clinical signs, direct examination of feces, the presumptive diagnosis of megabacteriosis was reached. For the treatment Nystatin 100,000 IU/mL / oral (VO) was prescribed at 0.4mL twice daily (Bid), for 15 days via a feeding tube attached to the insulin syringe, together with a drop of Tylosin and one drop of Glycopan Gold in two daily intakes (daily dose recommended by the manufacturer 1mL or 11 gts diluted in 100mL of water or 2 to 3 drops, once daily) directly in the beak, in addition to 5 drops of apple cider vinegar in 100 mL of drinking water. After 7 days of treatment, there was improvement of the animal, but still presented slimming and seeds in the faeces. The treatment was followed and with 16 days of treatment the animal was revaluated, presenting normal stool coloration, weight gain, absence of regurgitation and seeds in the faeces, and again singing and receiving discharge.