[An epidemiological investigation of eperythrozoon infection in human and animals (III)]

This paper reported an epidemiological investigation on human and animal infection to Eperythrozoon in 5 provinces. The results showed that Eperythrozoon infection existed in human as well an in animals in those provinces. Due to geographical variation, the infection rates were different. The infection rate was not associated with sex and age in human. The overall infection rate of different Eperythrozoonoses was higher than in healthy humans. The cases of Eperythrozoonoses among human and pig-herd were reported in this paper.

[An epidemiological investigation of eperythrozoon infection in human and animals (II)]

This paper reported an epidemiological investigation on human and animals infection of eperythrozoon in 1 provinces. The results showed that eperythrozoon infection appeared in human as well as in swines, sheep, cats, donkeis and chickens. Due to geographical variations, the infection rates showed a significant difference, both in human and animals. The infection rate was not associated with sex, age or occupation in human, but was associated with seasons in animals. High peak of infection rates in animals was in May, June, July and August.

[An epidemiological investigation of eperythrozoon infection in human and animals. A Collaborative Research Group on Eperythrozoonosis]

This paper reported an epidemiological investigation on human and animal Eperythrozoons infection in five districts from three provinces in China. The results showed that Eperythrozoon infection appeaned in human as well as in swines, sheep and cats. Due to geographical variations, the infectious rates showed significantly difference both in human and in animals. The infection rate in human was not associated with sex, age or occupation. Some questions related to the epidemiology of Eperythrozoonosis were discussed in this article.

[A study on identification of atypical and R phase strains of Brucella]

This paper reports a comprehensive study on taxonomy of Brucella. In which 17 atypical and R phase strains were identified by using the routine methods, 6 groups of phages and oxidative metabolic tests. 4 McAb of Brucella were developed and applied for identification. Meanwhile OMP profiles of S phase of B. abortus, B. melitensis and B. suis were compared during identification of them. The results show that a comprehensive identification with routine methods, phage-typing and oxidative metabolic tests are able to determine these strains if they are species or biotypes. Several strains of Brucella McAb and OMP profiles of Brucella were firstly applied for identification of atypical and R strains, and provided some possibility in the application of identification of Brucella by using these two methods.

[Investigation of B. canis infection in China]

Twelve thousand nine hundreds and forty-nine dogs, 1,676 peoples and 2,255 animals of 15 species were detected for B. canis infection in 23 provinces and cities in China. Positive rates of dogs in various provinces were different (0.3-42.7%). The positive rates of dogs in south China were more higher than north. A positive rate of female was higher than male (2:1). Positive rate of young dogs (below 1 year old) was lower than older. There was no different of the positive rates among the age groups (more than 2 years old). 166 B. canis strains were isolated from spleen, lymph nodes and liver in 644 dogs. On the basis of two dyes sensitivity of B. canis isolated from China could divide into two types: one was resistant to both dyes, the other was resistant to thionine, but sensitive to basic fuchsin. Eight serological methods were used in the investigation. R-SAT and R-RBPT were more sensitive than the others. The positive rate of culture B. canis was 50%, when the dogs were selected for isolation at 1:80 titer. The positive rate of B. canis was 80%, when the dogs were selected for isolation at 1:320 titer.