The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



an acute or chronic infectious disease of poultry caused by Streptococcus zooepidemicus. Cases of perosis have been recorded in the USA, Sweden, Great Britain, Japan, and Australia. Chickens, turkeys, pigeons, ducklings, and young geese are susceptible to the disease.

Sick birds are the causative agent of perosis. The route of infection is through the digestive tract or an injured extremity. The disease lasts two to three weeks, with the mortality rate sometimes reaching 90 percent. An apparently healthy animal may suddenly die 12 to 24 hours after infection. In other cases, diseased poultry may be characterized by ruffled feathers, drowsiness, diarrhea, spastic movements of the head and extremities, nasal discharge, cyanosis of the comb, swelling of the joints, and the inability to produce eggs.

Perosis is treated with antibiotics and sulfanilamides. Preventive measures include disinfection of stock and animal quarters and the observance of health regulations concerning the raising of poultry.


Kapitanaki, M. V., and F. F. Filippov. “Khronicheskoe techenie streptokokkovoi septitsemii u kur.” Veterinariia, 1968, no. 9.


The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Unlike other vitamins, choline can be synthesised through de novo synthesis, but the inability to synthesise a sufficient amount can cause choline deficiency, resulting in growth retardation and perosis in young chicks.
Choline is a well-recognised nutrient that prevents fatty liver, perosis and growth retardation in poultry.
Besides, perosis and growth depression have been reported as the characteristic symptoms of choline deficiency in ducks [35].
With juveniles, "splay leg" or perosis. With mature hens, reproductive-associated diseases (egg binding, egg yolk coelomitis), "bumblefoot" or infectious pododermatitis, "sour crop" or infected/ impacted ingluvies secondary to another underlying disease process, and predator attack (from dogs, raccoons, foxes, and cats).
However, ad libitum feeding has been implicated in mortality and health problems such as ascites, tibial dyschondroplasia, necrosis of the femoral head, angular and torsional long bone deformities, perosis, spinal deformities, obesity and Sudden Death Syndrome [1, 3, 4].
In the chicken, a choline deficiency leads to perosis and impaired reproductive function.
Mrs Jenkinson suffers from osteo arthritis and osteo perosis.
Poor growth, hepatic fatty infiltration, and perosis were all observed in choline-deficient Pekin ducks (Bernard and Demers, 1949; Wen et al., 2014).
In addition, the legs of all ducks from each pen were examined for incidence of perosis according to symptom descriptions of Evans et al.
(4) In our case, the turkey was heavy and had concurrent bony malformations and tendon luxation (perosis).
In young, growing, heavy birds, subluxated gastrocnemius tendons (perosis) are generally secondary to chondrodystrophy, genetics, nutritional diseases (eg, hypomagnesemia, biotin deficiency), inadequate environment, and normal to excessive physical stress.
In a Mn-deficient animal, therefore, there can be a failure of endochondral ossification, resulting in chondrodystrophy and perosis (Underwood and Suttle, 1999).