Investigation On Epidemiology Of Pigs' And Goats' Eperythrozoonosis And Its Treatments And Prevention

Investigation on aetiology, epidemiology, clinical manifestation, treatment and prevention of pigs' and goats' eperythrozoon were made based on its prevailing characteristics and a large number of clinical cases, and pigs and goats on the farm.The results showed that Eperythrozoon exited not only in blood, but also in liver, spleen, heart, lung, lymph nodes, brain, spinal cord, bone marrow, feces, testicle, epididymis, ascites, bile, cerebrospinal fluid, seminal fluid, milk, etc; there were a number of Eperythrozoons in liver, spleen, lung, milk. Eperythrozoon shaped like a ball, pole, dumbbell, ellipse, etc in blood and a ball, and roundness in the other tissues. But Eperythrozoons in different tissues had the same staining characteristics.Eperythrozoon did not die until it was in 2% iodine tincture for five to ten minutes, 3-5% cresol soap solution for 5 minutes, 3-5% carbolic acid solution for 4-6 hours. Eperythrozoons of the larger size were killed by 3% NaOH solution in eighteen to twenty four hours and 0.1% Xinjiermie solution in over twenty four hours while the smaller converged formed scale-shaped and were movable in 3% NaOH solution or 0.1% Xinjiermie solution for twenty four hours.Incidences of Eperythrozoon infection had no difference in seasons, but were higher (p<0.05) in intensive breeding animals than in the free feeding. Goat's blood with Eperythrozoonosis caused healthy goats, but not dogs and chickens, to be infected by abdominal cavity or vein inoculation artificially.The disease spread through placenta. The statistics showed that the incidence of Eperythrozoon infection in lambs was 93.9% (200/213) and in piglets 74.70% (372/498) and that the infection rate and morbidity in ewe were 100% (357/357) and 17.93% (64/357). In bad environment, morbidities of this disease in fattening pigs, sow and weaned pigs were 20.95% (22/105), 7.78% (7/90) and 28.17% (29/110), respectively. Syringe needle was an important propagating factor for the disease. In addition, climate sudden change and stress were its inducing factors.Eperythrozoonosis did not have characteristic symptoms. Most ill goats or pigs were anemic; their blood is thin and pink with bleeding spots on the skin and edema in the lip,...