2.1. Brazilian merganser
As part of the Brazilian merganser Conservation Program, the Itatiba Zoological Park (Sao Paulo state, Brazil) carries out a successful breeding project. In October 2019, an 8-day-old Brazilian merganser born in the breeding program became ill presenting respiratory symptoms (dyspnea, prostration, hyporexia and weight loss). The duck received prophylactic antibiotic treatment (i.e., Enrofloxacin – Chemitril, Chemitec – 15mg/kg, IM, q. 12h), with unsuccessful results. The animal died presenting incoordination and opisthotonos, less than 24 hours after the first clinical signs.