Lanzhou Veterinary Research Institute diagnosed 3245 people as brucellosis positive?

Yes, the Health and Wellness Committee of Lanzhou City, Gansu Province reported that the brucellosis antibody positive event occurred in Lanzhou Veterinary Research Institute on 20 1 19/October 28th. By September 24, 2020, 2 1847 people had been detected, and 4646 people were initially screened positive, which was confirmed by the provincial CDC.

On February 26th, 20 19,65438, a joint investigation team composed of national, provincial and municipal experts found that from July 24th to August 20th, 2019, the expired disinfectant was used in the production of brucellosis vaccine in Lanzhou Biopharmaceutical Factory of Zhongmu, which led to incomplete sterilization of the waste gas discharged from the production fermentor.

The waste gas carries bacteria-containing fermentation broth to form bacteria-containing aerosol. During the production period, the main wind direction in this area is southeast wind, and Lanzhou Veterinary Research Institute is located in the downwind direction of Zhongmu Lanzhou Biopharmaceutical Factory. Human body inhalation or mucosal contact produces antibody positive, which leads to brucellosis antibody positive event in Lanzhou Veterinary Research Institute. This incident was an accident and an exposure in a short time.

Extended data

Clinical manifestations of brucellosis:

The clinical manifestations of this disease are varied. As far as individual patients are concerned, their clinical manifestations can be simple, only local abscess, or complex, with several organs and systems involved at the same time.

Brucellosis of sheep type and pig type is more serious, and the symptoms of cattle type are lighter, and some cases may not have fever. Brucellosis in sheep is the most common disease in China. The natural course of the untreated patients is 3 ~ 6 months (average 4 months), but it is as short as 1 month and as long as several years.

The course of disease can generally be divided into acute and chronic, and the acute stage of bovine type is often not obvious. The incubation period is 7 ~ 60 days, usually 2 ~ 3 weeks, and a few patients get sick several months after infection or more than 1 year. Most of the laboratory infected people get sick within 10 ~ 50 days. Human brucellosis can be divided into subclinical infection, acute and subacute infection, chronic infection, localized and recurrent infection.

Wang Shun-What happened to 3245 people who were confirmed to be brucellosis positive in Lanzhou Veterinary Research Institute?