| Chlamydia trachomatis is an infectious disease caused by Chlamydia psittaci and abortive Chlamydia trachomatis, mainly infecting animals, but can be passed through the infected animals tohuman. Chlamydia trachomatie does not have a regional character asit widespreadin the Americas, Europe, Asia, Africa and Oceania. Chicken infected Chlamydia mainly cause salpingitis, peritonitis and decreased egg production and other symptoms. Chlamydia can be parasitic in different age groups of poultry, causing incalculable economic losses to the poultry industry, in addition, a large number of chlamydia persisting in sick animals and poultry feces poses a certain threat to the public health.In order to find out the epidemic situation of Chlamydia trachomatis in Tianjin area, 10015 serum samples of 88 farms were collected from 10 districts and counties in Tianjin from January to December in 2013. Among them, 4060 hens, 3470 broilers, 1270 breeders, 560 ducks, 655 meat ducks; 10175 breed chicken sperm and cotton swab samples. The average positive rate of antibody was 14.89%, and 1364 positive samples were detected by fluorescence PCR. The average positive rate of swabs and semen samples was 13.41%. Chlamydia seropositivity and the level of positive are closely related to poultry rearing.In order to explore the method of blocking the spread of Chlamydia disease, we use the injection of chicken and chicken vaccination to reduce chicken embryo infection rate. The results showed that Chlamydia trachomatis in chick embryo yolk sac was significantly decreased after inoculation with doxycycline hydrochloride and ciprofloxacin hydrochloride. Chick rate, Chick rate and birth weight were significantly improved. After immunization with Chlamydia pneumoniae, the positive rate of antibody increased by 58.72% and the death rate decreased by 0.79%. Drug injection and chick embryo immunization can be an effective method of disease prevention and control of chicken Chlamydia disease. |
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