Official explanation of Shanghai Songjiang dead pig incident

According to relevant persons from Songjiang District Agriculture Committee, after several days of high-density fishing operations, the number of dead pigs that have been salvaged ashore at 10 has exceeded 1200. Centralized and harmless disposal of these dead pigs in time. According to the breeding information such as ear tags on dead pigs, these dead pigs basically come from the upper reaches of Shanghai.

10 night, the person in charge of the water supply department of Shanghai Water Affairs Bureau said that the floating dead pigs in Songjiang section of Huangpu River did not affect the local tap water supply.

On March 3, 2065438, the number of dead pigs salvaged from Huangpu River increased to 660 1. Previously, Shanghai had provided Jiaxing, Zhejiang with 14 pig ear tags, which were suspected to be the source of dead pigs.

Zhejiang Province

Director Gu of Animal Disease Prevention and Control Department of Animal Husbandry and Veterinary Bureau of Zhejiang Provincial Department of Agriculture said that the news from Shanghai showed that among the 1200 dead pigs salvaged from Huangpu River, more than 10 dead pigs were identified by ear tags as from Jiaxing, Zhejiang Province, and most of the remaining dead pigs were unmarked, unknown in origin or illegible due to decay. According to the degree of decay, some pigs died at least a month ago.

Director Gu said that because there are dead pigs on the river, Zhejiang Animal Husbandry Bureau and Jiaxing Agricultural Department have carried out investigations to eliminate the phenomenon of swine fever. Most of the dead pigs are piglets weighing more than 10 kg or more than 20 kg, and the cause of death is mostly freezing to death.

"There are more than 7 million pigs in Jiaxing, Zhejiang. Under normal circumstances, the mortality rate of pigs with good conditions reaches 10%, and those with poor conditions can reach 20%. " Director Gu said that according to the amount of breeding, the number of dead pigs is a normal mortality rate. In winter, there is much rain and humidity, and piglets have weak resistance. In case of some small-scale farming, poor heat preservation measures, weather changes are more likely to lead to the death of piglets.

Jiang Hao, deputy director of Jiaxing Animal Husbandry and Veterinary Bureau, revealed that Shanghai provided 14 ear tags related to Jiaxing. "14 ear tags all show that epidemic prevention is in Jiaxing, which means that the vaccine for pigs hits Jiaxing. However, after the epidemic prevention, pigs may continue to be raised in Jiaxing, or they may move to other places. Jiaxing is actively checking. "

For the time of dead pigs, Zhao has investigated several illegal pig breeding sites according to the ear tags provided by Shanghai. She stressed that ear tags do not mean that all dead pigs are from Jiaxing.

counter-measure

According to authoritative media reports here, the Shanghai Center for Animal Disease Prevention and Control conducted an investigation on the epidemic situation of live pigs in Shanghai, focusing on Songjiang, Jinshan and Qingpu in the upper reaches of Huangpu River. According to the investigation, there was no major animal epidemic and mass death of pigs in Shanghai in the early stage, and no dumping of dead pigs into Huangpu River and other waters was found. Shanghai pig production is generally stable.

It is said that the Shanghai municipal government is highly concerned about the progress of floating dead pigs in the upper reaches of Huangpu River. In the past few days, relevant departments have continuously increased their disposal efforts, and made efforts to ensure the safety of drinking water sources and the water supply of waterworks to meet national standards by moving forward the salvage gate, setting up an aquatic plant interception library and increasing the frequency of water quality monitoring. At the same time, relevant departments continue to do a good job in information communication with the agricultural departments of Zhejiang Province and Jiaxing City, strengthen joint prevention and control, and implement preventive measures from the source.

1 1 In the morning, the Shanghai Municipal Department of Greening, City Appearance and Sanitation has completed the erection of the aquatic plant interception bank near the waters of Maogang Bridge, and Songjiang District is working hard to complete the erection of the aquatic plant interception bank in Hengliaojing waters to enhance the interception ability of the dead pigs flowing into the upstream. In addition, Jinshan District has also increased its salvage efforts, moving the salvage pass forward to the provincial boundary and strengthening the salvage capacity of dead pigs in Jinshan District waters.

According to the national standard "Regulations on Biosafety Treatment of Disease Animals and Disease Animal Products" (GB 16548-2006), the Shanghai Municipal Agriculture Commission organized relevant departments in Songjiang and Jinshan District to deal with the dead pigs that were salvaged ashore in time, and the Shanghai Animal Health Supervision Office gave technical guidance. Relevant departments have also strengthened the disinfection of docks, deep buried areas and shipping tools.

In view of the continuous occurrence of floating dead pigs in the Huangpu River and the upper reaches, the Shanghai Municipal Commission of Agriculture will continue to do a good job in guiding the harmless treatment of dead pigs to ensure standardized operation and eliminate possible environmental impacts; At the same time, continue to monitor the epidemic situation of floating dead pigs and notify the Ministry of Agriculture and Zhejiang Province in time.

It is understood that Shanghai water, sanitation, environmental protection and other departments have been monitoring the water quality of 9 water plants in 6 water intakes in relevant areas for several days. Raw water mainly monitors 9 indicators, such as turbidity, chromaticity, odor, visible matter, CODMn, ammonia nitrogen, total bacteria, total coliform bacteria and fecal coliform bacteria. On the basis of monitoring 9 indexes of the factory water once a day, the total number of colonies, total coliforms, thermotolerant coliforms and other microbial indexes are mainly detected, and the detection frequency is increased to once every 4 hours, and the detection of residual chlorine is also increased to once every 1 hour on the basis of real-time online monitoring.

In addition, since the evening of March 8, 20 13, Shanghai Water Affairs Bureau has required all water plants to strengthen disinfection by strengthening conventional water treatment. The relevant departments also require the water plant to supplement the viruses and five bacteria that may be carried by six common pig diseases into the next stage of water quality monitoring indicators as the main targets of disinfection measures in the water plant.

The quality of raw water in the upper reaches of Huangpu River is generally stable, which is basically similar to the same period of 20 12. The existing water quality monitoring results show that the factory water of Songjiang, Jinshan, Minhang, Fengxian and other related water supply enterprises meets the national sanitary standard for drinking water.

It is said that in view of the health status of front-line salvage and cleaning personnel, Shanghai city appearance and environmental sanitation department has asked all relevant operating units and departments to take a number of measures to increase labor protection and health protection measures.

2065438+March 1 1, in 2003, the Shanghai Municipal Agriculture Committee disclosed that 1 pig was found to be positive for porcine circovirus among the dead pigs salvaged from Songjiang section of Huangpu River, and it was preliminarily judged that porcine circovirus caused classical swine fever. According to the latest data, more than 3,000 dead pigs have been salvaged in Huangpu River since March 5, 20 13.

Shanghai Water Department has asked relevant water supply enterprises to adopt enhanced conventional treatment process to appropriately increase the residual chlorine in the factory water to 2.0 mg/L. Water departments in relevant areas monitor the water quality every hour, focusing on the analysis of oxygen consumption, ammonia nitrogen, total number of colonies and total coliforms.

Does it affect the water quality?

According to the daily report of the Shanghai Municipal Government, the water quality is basically normal after strict testing so far. This release caused many questions: "There are thousands or even tens of thousands of dead pigs floating on the Huangpu River, but the water quality is basically stable? Is it possible? "

It is understood that there are several major water sources in Shanghai, namely, the upper reaches of Huangpu River, Qingcaosha in the Yangtze River Estuary and Chen Xing in the Yangtze River Estuary, and the Dongfeng Xisha in Chongming is under construction. The dead pigs are concentrated in the upper reaches of Huangpu River, mainly supplying water to Songjiang, Jinshan, Minhang and Fengxian suburbs, involving 6 water intakes and 9 water plants of water supply enterprises in 4 districts, with a total water supply scale of 24 1 10,000 tons/day, accounting for about 22% of the city's scale; Qingcaosha water source is responsible for 70% of Shanghai's water supply, which is safe and reliable. The drinking water in the central city and other suburban counties has nothing to do with the water source involved in this incident.

And why is the raw water quality in the problem waters "basically normal"? According to the Shanghai Water Affairs Bureau, according to the national standards, in addition to detecting nine routine indicators of water quality such as turbidity, chromaticity, smell and visible matter, Shanghai has also added microbial indicators such as porcine circovirus to the water quality monitoring indicators, and added indicators such as Streptococcus suis, Salmonella, Escherichia coli O 157 and heat-resistant coliforms to the factory water. The test results show that 9 routine indicators meet the national standards, and the total coliforms and heat-resistant coliforms are "not detected".

An agricultural expert who asked not to be named made an analogy to the reporter: "It's like finding a few dead flies in a swimming pool. It's disgusting, but how much will it affect the water quality?" What's more, the Huangpu River is very wide and it is running water. "

A person in charge of the Shanghai water department said that dead pigs, aquatic plants, garbage and other floating objects are all on the water surface or stranded on the river bank. Many bacteria have a survival period, and some will die soon after leaving the living body. The water intake of aquatic plants is mostly located in the center of the river near the bottom of the river, where the water flow is fast and the water quality will be better than the surface.