The old man glanced at the owner of the pig farm, "Boss Li, do you really think that now the little soldiers are busy saving people in the town, how can you have time to take care of your pig farm, people are more important than animals at this time." ”

Li Jiancai, the owner of the pig farm, was not convinced, "People don't grow up eating livestock, why aren't my pigs important?" What are you bringing these CDC people for? I'm still busy tidying up the pigsty, so I don't have time to receive you. ”

was scolded by the owner of the pig farm, and the old man was not happy, and asked: "The disease control experts are here to check your pig farm, there are dead pigs in the Yudai River, are they thrown by your pig farm?" Did you know that there was an outbreak of infectious disease in the town because of the dead pigs in the river? ”

The old man said with anger in his words, and a trace of panic flashed in the eyes of the pig farm owner, but he quickly calmed down and retorted: "What evidence do you have that I threw the pig?" Besides, there are usually dead fish, dead chickens, and dead ducks in the Yudai River, why do you say that it is the problem of my pig farm? In the past, the people in the town were fine, but the infectious disease that appeared after the earthquake was caused by the earthquake, and it had nothing to do with my pig farm. ”

The old man couldn't refute for a while, and he held back for a long time before he came up with a sentence, "There are dead pigs in the river, and there is a pig farm near the Yudai River in Qingshan Town, who else will you throw it away?" ”

"You're spewing blood!"

The earthquake and the ensuing cholera epidemic made everyone sensitive and irritable.

Gu Yanan stopped the quarrel between the two in time, "Our disease control is just here to do flow sampling and environmental disinfection, before the test results come out, everything is speculation, please cooperate." ”

The owner of the pig farm and the old man stopped arguing.

Gu Yanan carried the sampling box, and Lu Li and two other local disease control personnel carried disinfectant on their backs to prepare to disinfect the environment.

Gu Yanan asked the owner of the pig farm, "What is the loss of your pig farm because of the earthquake?" ”

The owner of the pig farm looked distressed and frustrated, "Look at my pig shed, all of them have collapsed, killing many pigs, and some pigs have run away." ”

The proprietress of the pig farm also came over when she heard the movement, "Because the fence of the pigsty was damaged by the earthquake, many pigs took advantage of the chaos to run into the nearby woods, we searched for a day, only to find a few heads, just counted, there are eight missing, these eight either ran into the depths of the forest, or fell into the river and drowned." ”

"What do you do with dead pigs?" Gu Yanan asked.

"I'm digging a pit, ready to bury it." The owner of the pig farm pointed not far from the ruins, "Some of them have been buried, and there are still a few that just died today and are being re-dug in the pit." ”

Two workers on the pig farm were digging a pit, and Gu Yanan walked over with a sampling box.

The pit where the dead pigs were buried was almost dug and the workers were preparing to throw the dead pigs into the pit.

"Wait!" Gu Yanan suddenly spoke up to stop the workers.

The workers stopped, looked at Gu Yanan, and then looked at the owner of the pig farm, a little at a loss.

Gu Yanan stepped forward to inspect the dead pigs and found that there were no external injuries on these dead pigs, and there was beige mucus at the corners of their mouths, which did not look like they were stoned to death, but more like they died of disease.

"These pigs weren't stoned." Gu Yanan said with certainty.

One of the workers had a twinkle in his eyes, and glanced at the pig farm owner beside Gu Yanan, who wanted to speak and stopped.

Gu Yanan knew that the workers were afraid of telling the truth and being reprimanded by the boss.

Gu Yanan asked the boss directly, "When did the pig farm start to have sick and dead pigs?" ”

The owner of the pig farm snorted: "What is the sick and dead pig? These pigs died because of the earthquake. ”

"The pigs were clearly sick and dead." Gu Yanan pointed to the beige secretion at the corner of the dead pig's mouth, and said with a little intimidation: "Many of the symptoms that can cause this symptom are zoonotic diseases, don't you worry about your own safety after you have come into contact with so many dead pigs?" ”

The owner of the pig farm looked nervous and was hesitating to tell the truth, when the workers on the side spoke first, "Today, these dead pigs are sick and dead, and some pigs began to get sick before the earthquake, and only a small part of the pigs were stoned to death by the earthquake." Doctor, I heard that there is an infectious disease in the town, and it is quite serious, is it really infected by dead pigs? We spend every day with pigs, will we be okay? ”

The owner of the pig farm rushed to say: "Even if these pigs are sick and dead, it is just ordinary swine fever, and swine fever is not contagious, I have been in the pig farm, I am not well, so the infectious disease in the town has nothing to do with my pig farm." ”

"I've been having diarrhea for the past two days." One of the workers said to Gu Yanan.

was slapped in the face by his own workers on the spot, and the owner of the pig farm had an ugly face.

Gu Yanan opened the sampling box and sampled the dead pigs, the pigsty and the surrounding environment.

The owner of the pig farm has been watching from the sidelines, the more he looks, the more nervous he feels, and he begins to tell the truth, "Comrade from the disease control, in fact, some time before the earthquake, the pigs in my pig farm had a disease, and the veterinarian was invited to come and see it, and it was fine after prescribing the medicine to eat, and after two months, that is, the day before the earthquake, the pigs in the pig farm began to diarrhea again, and they were about to feed the remaining medicine from the last time when the earthquake occurred."

During the earthquake, many pigs were killed, and more pigs died of disease than pigs in the past two days.

This swine fever can't really infect people, right? ”

Gu Yanan finished collecting samples, put away the sampling box, and replied with a serious face: "This depends on the test results to determine the specific pathogen of the epidemic, before that, contact with sick and dead pigs must be protected, in order to confirm whether you are infected, I want to collect blood samples and feces from all members of the pig farm." ”

This time, the owner of the pig farm was very cooperative, and immediately stretched out his arm and lifted his sleeve, "Yes, you can pick as much as you want." ”

In addition to the owner and his wife, there were two workers on the farm, and all of them had their blood samples collected quickly.

Just as Gu Yanan put away the last tube of blood, Lu Li shouted not far away, "Sister Yanan, come and see, there is a problem on the pig farm." ”

Gu Yanan walked over and found that Lu Li was standing next to a big pit, the pit was piled with pig manure, and there was a long crack on one side of the big pit, and the pig manure water spread to the river not far away with the crack.

This is the upper reaches of the Yudai River, which flows through Qingshan Town.

Gu Yanan frowned slightly, there were not only dead pigs in the Yudai River, but also a large amount of pig manure.

Gu Yanan called more people to deal with the outbreak at the Banshan pig farm, and at the same time, the samples collected from here were sent to the W Provincial Center for Disease Control and Prevention by disaster relief helicopter.

That night, the PCR results came back.

Vibrio cholerae was detected in the first case, in people with diarrhea symptoms in temporary settlements, in the saliva of dead pigs in mid-mountain pig farms, pig manure, and in water from the Yudai River.

One worker on the farm was confirmed to be infected with Vibrio cholerae and showed cholera symptoms, while the other three people were detected with Vibrio cholerae and did not show cholera symptoms, so they were recessive infected with Vibrio cholerae.

The outbreak was officially identified as cholera.

The source of infection and the route of transmission were also clarified, cholera appeared in pig farms in the upper reaches of the Yudai River, because of the earthquake, pig feces containing Vibrio cholerae and dead pigs polluted the water of the Yudai River, and the residents of Qingshan Town, who were affected downstream, were infected with cholera after washing with river water, resulting in an outbreak of cholera in the population.

The source of infection and the route of transmission were identified, and a series of control measures were introduced: food hygiene, drinking water hygiene, environmental sanitation, vector biological control......

Soon, the cholera outbreak was brought under control, with no new cases and no deaths throughout the outbreak.

At the same time as the epidemic was brought under control, further laboratory results came out.

Cholera strain isolates from this cholera outbreak have been identified as non-O1/non-O139 serotypes, a pathogen that can cause sporadic and localized outbreaks.