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The disease affects all ages of chickens. The disease can persist in the flock for 2-3 weeks and signs of the disease are seen 1–3 days after infection. Transmission of the disease is through direct interaction, airborne droplets, and drinking contaminated water. Chickens having infection and those carriers contribute highly to the disease ...
It causes chronic respiratory disease (CRD) in chickens and infectious sinusitis in turkeys, chickens, game birds, pigeons, and passerine birds of all ages. [1] [2] Mycoplasma gallisepticum is a significant pathogen in poultry. Mycoplasmosis is the disease caused by infection with mycoplasmas. Mycoplasmas have many defining characteristics.
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 commonly known as "Marek's disease virus" (MDV). [ 2 ]
Echidnophaga gallinacea prefer to target host areas which are void of hair and fur, for chickens this is the eyes, comb and wattle. [ 1 ] [ 2 ] If left, Echidnophaga gallinacea can cause irritation to the host due to feeding, this impact can also increase due to the number of Echidnophaga gallinacea feeding on a host.
Infection with the virus is associated with swollen head syndrome, with swelling peri- and infraorbital sinuses, foamy eyes, nasal discharge. In general, less than 40% of the flock becomes infected, and the mortality is around 2%. [4] Young chickens become depressed or crowd together under heating lamps. [2] Flocks become quiet after infection. [2]
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The disease carries a high mortality rate, and is particularly highly fatal in poultry, and less in other birds. Currently, no prescription drug is approved to treat this disease. [3] Poultry (especially free-ranging) and wild birds commonly harbor a number of parasitic worms with only mild health problems from them. Turkeys are much more ...