Clinical Investigation And Diagnosis Analysis On Porcine Eperythrozoonosis

Eperthrozoonsis is a parasitic disease caused by eperthrozoon parasitizing on the surface of the erythrocytes, plasma, tissue fluids and cerebrospinal fluids, which can cause anemia, icterus and fever. In recent years, the reports associated with this disease are increasing gradually. In order to determine the infection status and morbidity of eperythrozoon in Xuchang area of Henan province, the epidemic, clinical signs and pathological observations for the disease were investigated; The diagnostic methods using lifeblood were conducted for total 349 blood samples from 18 swine farms of 10 districts in Xuchang, 36 individual producers together with 50 slaughter blood samples, as well as 17 samples from cow, canine, rabbit and human. The results showed that eperthrozoon existed in all the blood samples with 100% of the positive rate. The infection intensity over 10%~50% was frequently observed in sick pigs and healthy pigs, the infection percentage was 44% and 49% respectively. During medication treatments and prevention tests, the morphological changes in erythrocytes and eperthrozoon existed all the time. There was no significant difference in different stages, however the fluctuation was seen. During the clinical investigation, classical swine fever, PRRSV, PRV were detected. Combination infection and co-infection of eperthrozoonsis with other diseases were usually found. The false positives were found while using lifeblood and pigmentation diagnostic methods. Based on the analysis of the false positives, it was suggested that the comprehensive diagnosis including clinical signs and pathological changes should be considered and a further investigation should be conducted on the pathogen when diagnosing eperthrozoonsis.