Publicación: Hepatitis viral del pato y su presentación en el ánade real o azulón (ánade platyrhynchos), en el territorio colombiano durante su ruta migratoria
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Duck virus hepatitis (DVH) is an acute course infection that is also extremely contagious in ducks less than 6 weeks of age and often in ducks less than 3 weeks of age and is usually classified into types I, II and III. Type I DVH can be triggered by at least three different genotypes of duck hepatitis A virus (DHAV), being a member of the genus Avihepatovirus, family Picornaviridae. The most pathogenic and widespread is the type I HPAV (HPAV-1), which was originally called duck hepatitis virus-1. VHPA-2 and VHPA-3 are two genotypes of the genus Avihepatovirus that have subsequently been identified as additional aetiological agents of VHP in ducks. When observed as a clinical disease, it is characterised by a process of lethargy and ataxia, followed by opisthotonos and leading to death of the duck. Under other circumstances, issues such as splenomegaly and renal swelling with some congestion of the renal blood vessels are likely to occur. On the other hand, microscopic lesions of the liver, ranging from extensive hepatocyte necrosis to bile duct hyperplasia, along with varying degrees of inflammatory response and haemorrhage, should also be noted. In Colombia, the disease was first reported in 1984 in birds from the northern coast of the country and was officially declared to the OIE in 2001. It was reported in broiler flocks between 5 and 10 weeks of age, generating a clinical picture characterised by a rapid course (24 hours or even less) and a cumulative mortality between 3.7 and 6%, giving a limited time to act against the virus. So far, there are no reports on the prevalence of the disease in Colombia. Based on the above, it is necessary to carry out studies to determine the presence of antibodies against adenovirus type I and hepatitis with inclusion bodies in farms, with the aim of contributing to the knowledge of the behaviour of this aetiological agent that affects poultry farms in the country. It is also important to promote research in the departments of Cundinamarca and Santander, where there is a high concentration of commercial poultry, in order to promote the control and prevention of the virus to avoid diseases of economic impact on the Colombian poultry industry. The objective aims to compile updated information on viral hepatitis in ducks and its singular frequency of presentation in Colombian territory during its migratory route.