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Marek's disease is a highly contagious viral neoplastic disease in chickens. It is named after József Marek , a Hungarian veterinarian who described it in 1907. Marek's disease is caused by an alphaherpesvirus known as "Marek's disease virus" (MDV) or Gallid alphaherpesvirus 2 (GaHV-2). [ 2 ]
Dermanyssus gallinae (also known as the red mite) is a haematophagous ectoparasite of poultry.It has been implicated as a vector of several major pathogenic diseases. [1] [2] Despite its common names, it has a wide range of hosts including several species of wild birds and mammals, including humans, where the condition it causes is called gamasoidosis.
The symptoms include neurological signs such as tremors and head pressing, respiratory signs such as coughing and nasal discharge, and systemic signs such as fever and loss of appetite. Physical examination may reveal petechiae of the mucous membranes , tachycardia , and muffled heart sounds.
Virulent Newcastle disease (VND), formerly exotic Newcastle disease, [1] is a contagious viral avian disease affecting many domestic and wild bird species; it is transmissible to humans. [2] Though it can infect humans, most cases are non-symptomatic; rarely it can cause a mild fever and influenza-like symptoms and/or conjunctivitis in humans.
Avian sarcoma leukosis virus (ASLV) is an endogenous retrovirus that infects and can lead to cancer in chickens; experimentally it can infect other species of birds and mammals. [ 1 ] [ 2 ] ASLV replicates in chicken embryo fibroblasts , the cells that contribute to the formation of connective tissues.
Poultry diseases occur in poultry, which are domesticated birds kept for their meat, eggs or feathers. [1] Poultry species include the chicken, ...
Egg drop syndrome '76 (EDS '76) is a viral disease that affects birds, notably chickens, ducks, geese and swans. It is characterised by a sudden drop in production of eggs as well as its eggshell quality in apparent healthy laying birds.
Chicken anemia virus, or CAV, is currently a member of the Anelloviridae family which is found worldwide. [1] The virus only affects chickens . [ 2 ] CAV is a non-enveloped icosahedral single stranded DNA virus, [ 3 ] which causes bone marrow atrophy , anemia , and severe immunosuppression .