Inside a medical tent in isolation.

The condition of the first patient has been temporarily stabilized due to the change in treatment plan.

To find out how the first patient was infected, the most important thing is to talk to the patient about his life experience in the past few days.

The patient had a hanging needle on his arm to replenish body fluids, and he was in good spirits while lying on the hospital bed, and Gu Yanan began the second inquiry after Nan Zhiqiao's first inquiry.

"In addition to eating food and water in the past few days, what other things have you been exposed to? Including those that are not entered. ”

The patient thought for a moment and shook his head, "When I was in the earthquake before, my foot was slightly injured, and I have been staying in it since I came to the temporary tent area, and I have never been anywhere else. ”

"You brush your teeth with river water?" Gu Yanan asked in surprise.

"Yes, I see that the river water is quite clean, and many people use the water in the river to brush their teeth and wash their faces."

Lu Li, who was standing beside the hospital bed, muttered in his heart: Where is the river clean? To the naked eye, it looks a little muddy, and I don't know how many harmful microorganisms there are in it, and there are abandoned dead chickens and dead ducks by the river, and two of them were salvaged from the river in the morning, so the river water can also be used to brush teeth? It's no wonder if you don't get sick.

Gu Yanan no longer asked the patient, but turned back and instructed Lu Li, "Now go to the river to sample the river water." ”

——

By the river next to the temporary tent area in Qingshan Town.

Gu Yanan and Lu Li collected water samples in several places along the river according to the location explained by the first patient.

The detection of Vibrio cholerae from river water needs to be cultured for a period of time before testing, because the experimental conditions in the earthquake-stricken area are limited and there is no equipment to grow the bacteria, so the water samples are brought back to the W Provincial Center for Disease Control and Prevention with the helicopter carrying the relief materials.

Looking at the helicopter with the specimen leaving the sky over Qingshan Town, Gu Yanan felt uneasy in his heart.

If there is a problem with the water in the Yudai River, where there are a large number of Vibrio cholerae, then anyone who has been in contact with the river water can become infected.

was worried, Lu Li, who had just gone to the medical tent to check the situation, hurriedly ran back, "Sister Yanan, it's not good, the medical tent has received a few more patients with cholera symptoms." ”

I'm really worried about what's coming.

Gu Yanan hurried back to the medical tent to find that it was already overcrowded, and the doctors and nurses were setting up a new tent outside the medical tent with several fighters, ready to accept more patients.

Nan Zhiqiao commanded the disease control emergency team to help in the crowd, and after meeting Gu Yanan, the two began to exchange information about the investigation of their respective teams.

Nan Zhiqiao's always calm face was a little heavy, "A large number of patients with cholera symptoms have been detected in the temporary settlement, I have asked them some preliminary information, they are similar to the condition of the first patient, they have only eaten the food and water distributed by the group recently, and I suggest that they have recently eaten the food and water distributed by the group to be tested." ”

Gu Yanan nodded in response, "Food and water must be tested, but I suspect that this cholera outbreak may be related to the water of the Yudai River outside the temporary settlement." ”

Gu Yanan then told him what he had explained when she asked the first patient.

"Having been exposed to the water of the Yudai River, this transmission route is also very likely, Vibrio cholerae can exist for a long time in various natural water bodies, but to cause a large-scale cholera outbreak, there must always be a trigger, and the earthquake is the big trigger, what are the details of the induction? This must be investigated clearly, otherwise the epidemic will not be able to be controlled. Nan Zhiqiao analyzed.

"Understood." Gu Yanan made an OK gesture, "I will continue to investigate the matter of Vibrio cholerae in the water of the Yudai River." ”

"Okay, my team is responsible for testing food and water supplied collectively."

"Regarding the warning signs prohibiting contact with the water of the Yudai River, our group is responsible."

In the afternoon, simple warning signs were erected all over the banks of the Yudai River.

In the evening, the number of people who come to the shore to prepare for brushing their teeth, washing their feet, and washing their clothes increases.

Although warning signs were erected on the shore, Gu Yanan still gathered a few people to block and publicize at the scene.

An old man in his 60s was carrying a plastic basin with a towel in his hand, and brought his five or six-year-old grandson to the river, and was about to wash his feet, when he was stopped by Gu Yanan.

Gu Yanan pointed to the warning sign standing aside, "Now the water of the Yudai River may spread a cholera epidemic, so you can't approach it." ”

The old man stared at the warning sign for two seconds and asked: "Cholera is diarrhea, my wife had diarrhea and was sent to the medical tent next door because she brushed her teeth with the water in the river?" Doesn't it mean that there is something wrong with what we eat? That's what the people in the dwelling place say. ”

"Don't listen to rumors, listen to the notice of our disease control, don't touch the water of the Yudai River, and the food distributed collectively can be eaten."

The old man reluctantly looked at the surface of the Yudai River, this is the river water he has used all his life, why is there a problem?

Suddenly, the old man showed horror in his eyes, pointed to the river upstream, and shouted: "Look at it! What is that? Is it a dead body floating downstream? ”

The people on the shore looked in the direction of the old man's finger and found that there was indeed a lump of yellow-white things floating on the river, as if it was really a corpse.

Gu Yanan asked people to fish up the floating objects, and when they dragged them ashore, they found that it was indeed a corpse, but it was not a human corpse, but a soaked white dead pig.

Looking at the appearance of pigs, they are not wild boars, they are typical breeding pigs.

Lu Li looked at the pig carcass and complained, "How could a domestic pig die in the river?" Who must have thrown the dead pig into the river, this is also too immoral, I don't know if the dead pig will spread the disease if it is thrown away at will? Who threw the dead pig into the river? ”

Lu Li's complaint was heard by the old man, and the old man speculated: "There is a newly built pig farm in the mountains in the upper reaches of the Yudai River, could it be that they killed the pigs because of the earthquake, and then threw the pigs into the river, if it is true, they are too lacking in morality, they usually make money in the town, and now the earthquake throws the dead pigs directly into the river, you have to take care of it." ”

Gu Yanan thinks that the cholera outbreak is likely to have something to do with pig farms upstream.

Gu Yanan arranged for people to continue to guard by the river, and she took Lu Li and two local disease control workers to the upstream pig farm under the guidance of the old man.

——

Outside Qingshan Town, in the upper reaches of the Yudai River, pig farm.

Gu Yanan and his party crossed the mountain road and saw from a distance that the pig farm located on the slope of the mountain was in ruins.

There was a figure shaking in the ruins.

The old man who led the way could tell at a glance that the figure in the ruins was the owner of the pig farm - Li Jiancai.

"Boss Li, what are you doing? I'll bring someone from CDC to check on your farm. The old man shouted at the figure from a distance.

Li Jiancai was stunned in the ruins for two seconds, and when he saw Gu Yanan and his party wearing white protective clothing, he reacted, hurriedly walked out of the ruins, and stepped forward, "What are you doing with disease control?" Shouldn't it be the little soldiers of the army who will help me rebuild the pig farm? ”