Gu Yanan frowned slightly, she knew that she must find the cause as soon as possible, so that she could help with clinical treatment.

Not long after Mr. Zhou's phone ended, the office phone on the desk rang urgently.

This time it was Section Chief Zhang of Qixia County Disease Control and Control, who had just been on the scene with Gu Yanan in the afternoon, and now he called to report the epidemic again.

Section Chief Zhang's voice on the phone was anxious, "Director Gu, there is another epidemic, and there are patients in Yuanjia Village this evening, the symptoms are dizziness, headache, vomiting, and there are a lot of people, at least 50 people are currently being sent to the county hospital one after another. ”

Gu Yanan's heart sank, and he was really afraid of something.

The cause of Yuan Chunwang's family's illness has not yet been investigated, and now there are new cases, which is simply worse.

"Okay, got it, I'll take someone to the scene right away."

Several members of the emergency team were about to get off work, but now they received a new epidemic, Gu Yanan ordered: "There is a new epidemic in Yuanjia Village, all of them will go to the scene with me, Zhou Lao and Gao Fei will go to the county hospital to track the newly admitted patients, and Lu Li, Xiaoxiao and Xiao Chu will go to the patient's house in Yuanjia Village with me." ”

——

7:50 p.m.

Yuanjia Village.

The normally quiet mountain village is now brightly lit and buzzing, with ambulances coming and going.

When the municipal disease control emergency team led by Gu Yanan arrived, Zhang Zhang, the section chief of the county disease control, had already led people to start the on-site investigation.

The location of the flow was concentrated in the house of villager Yuan Jianfeng, who held a wedding banquet at noon.

The noon wedding banquet has been withdrawn, but the remaining meals of the wedding banquet are still left at Yuan Jianfeng's house.

Section Chief Zhang was inquiring about the situation of the villagers, and when he saw Gu Yanan, he took the initiative to greet him.

Gu Yanan: "What's the situation now?" ”

"I just learned that the new patients this time are all people who have attended the wedding banquet at noon today, 52 people participated, all of them were sick, the symptoms were mild and severe, mostly dizziness, nausea, vomiting, Yuan Jianfeng's family of 5 people who were busy with entertainment, and 3 cooks did not get sick."

People who were busy with socializing and cooks did not get sick, while people who had attended the wedding feast did not get sick, indicating that there was something wrong with the food at the wedding feast.

There was a problem with Yuan Jianfeng's wedding banquet at noon today, and there was a problem with Yuan Chunwang's birthday banquet at noon yesterday.

What is the connection between the two?

Gu Yanan was thinking about it, and Section Chief Zhang pointed to the corner of the courtyard, where there were several large tables with many pots and pans on them, and there were meals in them.

Section Chief Zhang said: "There is the leftover meal from the wedding banquet, and I am preparing to have people take samples and send them to the Municipal Disease Control Laboratory." ”

Gu Yanan walked to the table, looked at the food carefully, and found that there were many types, Sixi meatballs, sweet and sour carp, cold jellyfish, sweet and sour fungus...... Typical 10 dishes and 1 soup.

Yuan Jianfeng, the host of the wedding banquet, was on the side, because something happened to his family wedding banquet and everyone was sick, and Yuan Jianfeng looked worried at this time.

Yuan Jianfeng is just in his early 50s this year, his son got married, and he held a wedding banquet for his son, but he didn't expect such an unlucky thing to happen.

He nervously muttered to himself on the side, "How can this be, the dishes I use are all fresh......"

Gu Yanan walked up to Yuan Jianfeng, showed his work card, and asked, "You tell me all the raw materials used for today's noon wedding banquet, including all kinds of condiments, as well as the time and place of purchase." ”

Yuan Jianfeng finally found the person to confide in, and hurriedly proved his innocence, "Comrade doctor, the things used in my family's noon wedding today are all fresh, the pork was bought yesterday, the chickens and ducks were killed in the morning, the fish was just caught from the fish pond in the village in the morning, the vegetables are even fresher, they are all grown in his own greenhouse, and the mushrooms and white fungus were newly picked and sent by Yuan Chunwang from his greenhouse yesterday morning, and the salt, monosodium glutamate, and chicken essence at home are all leftover ...... used before."

"Wait!" Gu Yanan suddenly spoke, "You just said that Yuan Chunwang sent you mushrooms and white fungus?" ”

"Yes, he sent me a few shiitake mushrooms and a lot of white fungus yesterday, all of which are very fresh, because there are too few shiitake mushrooms, so I didn't go to the wedding table, and the white fungus asked the chef to make sweet and sour white fungus."

Gu Yanan remembered that in the information on Yuan Chunwang, he once said that there was a sweet soup of white fungus lotus seeds at the birthday banquet, and the white fungus was newly picked by him from his own greenhouse.

Finally found the common ground between the wedding banquet and the birthday banquet - fresh white fungus from Yuan Chunwang's greenhouse.

It's the rainy season, the weather is humid, and fresh white fungus is easy to spoil and breed Pseudomonas coconut.

Pseudomonas coconut itself is not very pathogenic, but it can produce exotoxins - oryza fermented acid and flatoxin.

Bacillic acid has a strong toxic effect on humans and animals, and can cause a variety of organ lesions.

Poisoning caused by flatoxins can cause methemothemia in humans, similar to nitrite poisoning.

This is also in line with the symptoms of the patient who was poisoned this time.

Gu Yanan immediately called Section Chief Li of the Municipal Center for Disease Control and Prevention, "Section Chief Li, I'm going to trouble you to work overtime again, and the blood samples of the poisoned patients today will be tested for rice fermented acid." ”

Section Chief Li asked in surprise: "Do you suspect that it is Pseudomonas coconut poisoning?" ”

"Well, highly suspicious, because the fresh white fungus of Yuan Chunwang's family was found at the wedding banquet in Yuanjia Village."

"Oh, okay, there is white fungus sweet soup in the specimen sent in the afternoon, I will make rice fermented acid in the white fungus sweet soup right now, and besides, you had better bring fresh white fungus specimens back, so that I can isolate the strain of Pseudomonas coconut."

"Okay, I'll take a sample for you to bring back later."

Hanging up the phone, Gu Yanan asked Yuan Jianfeng again, "Do you still have fresh white fungus that Yuan Chunwang gave you?" ”

"It's gone, it's all used at the wedding banquet, but there are still a lot of sweet and sour white fungus left."

Section Chief Zhang of the county CDC: "Director Gu, do you want to collect fresh white fungus specimens?" ”

"Well, there are live pathogenic bacteria in the fresh white fungus that has not been treated, and the sweet and sour white fungus soup and sweet and sour white fungus are processed at high temperatures, and the bacteria will be killed."

Yuan Jianfeng asked: "You mean that there are bacteria in my sweet and sour white fungus?" But the white fungus is very fresh, and the chef has scalded it with boiling water, and any bacteria can be killed, so how can it be poisoned? ”

Gu Yanan explained: "The Pseudomonas coconut in Tremella can be killed, but the exotoxin it produces is resistant to high temperatures and very stable to heat, so it can be poisoned even if it is cooked. ”

Yuan Jianfeng sighed and sighed, "It's really impossible to prevent it, you want fresh white fungus, I know where it is, there should be left in Yuan Chunwang's greenhouse." ”

"Where's his greenhouse?"

"Not far from the east end of the village, I'll take you there."

——

9:30 p.m.

Greenhouse vegetable area outside the east end of Yuanjia Village.

The moon was dark and the wind was high, and Yuan Jianfeng took a flashlight to lead the way for the CDC group in front.

After passing through the mud road between the greenhouses, I finally found the greenhouse of Yuan Chunwang's house.

The two greenhouses are adjacent to each other, Yuan Jianfeng glanced left and right, chose one of the greenhouses, and explained to Gu Yanan: "There is a smell of rotten wood in this greenhouse, which is the shed where Yuan Chunwang tried to grow mushrooms and white fungus." ”

The entrance to the greenhouse is a wooden door wrapped in cotton cloth, which is not locked, but is concealed.

I opened the door, and a hot and humid breath came over my face.