Gu Jiashu lifted the sheet to inspect and found that the epididymis between Gao Peng's legs was swollen and congested.

One more symptom.

All symptoms are combined, flushing and hyperemia of the skin with rash, swollen lymph nodes, hepatosplenomegaly, pneumonia, damage to the reproductive system, osteoarticular lesions......

"Cloth disease?" Gu Yanan and Gu Jiashu spoke in unison.

Gu Jiashu immediately contacted the hospital's laboratory department, "Immediately detect Brucella antibodies in Gao Peng's serum." ”

Gu Yanan: "The disease is a Class B infectious disease, and the students' specimens are sent to the CDC, and we have a reserve of molecular biology detection reagents, and the results can be obtained in two hours." ”

Lu Li was urgently recalled to the laboratory, and the results came back two hours later.

Brucella PCR positive.

The laboratory department of the hospital detected brucella antibodies in the serum of Gao Peng, Zhang Yao and other sick students.

This time, the freshmen of the School of Economics and Business were confirmed to be infected with Brucella, and it was the acute onset of brucellosis.

How can college students get sick en masse?

The disease is mainly transmitted through animals such as cattle and sheep.

Have students of the School of Economics and Business been exposed to infected animals?

Where do infected animals or food come from?

Gu Yanan directly began the epidemiological investigation, first asking about the recent experience of the student who became ill.

Squad leader Gao Peng's ward.

Gu Yanan asked: "Recently, have you and your roommates come into contact with cows, sheep and pigs, or deer and rats?" ”

Gao Peng: "No, I've been staying at home during the winter vacation, I've been in school since the start of school, I've never been to the countryside, I've never been to the zoo, I haven't come into contact with these live animals. ”

"Have you ever eaten the meat of these animals?"

"I usually eat pork, and I usually eat potato beef stew a few times, and mutton a few times."

"Where did you eat?"

"I ate at my home and relatives' houses during the winter vacation, and I've been eating in the school cafeteria since school started half a month ago."

It was the students who fell ill, and the school cafeteria sounded more like a place with a source of infection.

Gu Yanan asked Gao Peng, "Except for the freshmen of your School of Economics and Business, is there anyone else in the school who has similar symptoms?" ”

"I don't know, our dormitory has been uncomfortable since yesterday, and I haven't paid attention to anyone else."

"I know the situation." Teacher Ni, a young female counselor who was also in the ward, spoke, "Since the students in the three dormitories of the 2019 freshmen of our School of Economics and Business suddenly fell ill collectively, I have reported the situation to the hospital. ”

In other words, this cluster of cases is only concentrated in the 2019 freshmen of the School of Economics and Business, and it is concentrated in three dormitories.

This indicates that the likelihood of a source of infection in the school cafeteria is reduced, after all, the number of students who eat in the school cafeteria is large and widespread, and the incidence of infection is not concentrated in only three dormitories.

And almost everyone in the three dormitories got sick, except for my cousin Li Xinran.

"Have there been any recent group activities in the three dormitories?" Gu Yanan stared at Gao Peng on the hospital bed and continued to ask.

Gao Peng thought for a while, "Yes, we have two dormitories for boys, as well as Zhang Yao and their girls' dormitories, and we had a barbecue together in the snack street next to the university town five days ago. ”

"What do you eat at barbecue?"

"Lamb skewers, pork skewers, grilled steamed buns, grilled mushrooms or something, the beer we boys drink, and a few girls drink goat's milk."

Gu Yanan felt that the transmission route of the disease had gradually become clear.

Grilled lamb and pork usually cannot be heated sufficiently, and the microorganisms in the meat cannot be completely killed.

Raw goat's milk can also spread the disease.

After finding clues from the sick person, Gu Yanan began to arrange for disease control personnel to start on-site investigation.

Because the students' barbecue took place five days ago, in order to find the source of infection as soon as possible and prevent more people from being infected, Gu Yanan urgently recalled several people from the emergency office to work.

Gu Yanan, Gao Fei and Wang Xiaoxiao went to the food street next to the university town in the East District.

——

Food Street, East Lane Mouth Barbecue Restaurant.

The owner of the barbecue restaurant is a strong man in his forties.

The boss saw a group of people with serious faces carrying boxes and blocking the door of the barbecue stall, and his face was displeased, "What are you doing?" ”

Gu Yanan showed his work card, and the barbecue stall owner had a trace of panic in his eyes, but quickly calmed down.

"It turned out to be from the CDC, and my barbecue stall is licensed to operate, what do you want to investigate?"

"We suspect that your barbecue restaurant is related to an outbreak of cloth disease, so come here for sampling and investigation, please cooperate!"

"What's it?"

The owner of the barbecue stall was reluctant to let the disease control people inspect his shop, but he did not dare to block the government officials head-on, so he could only pull out various reasons.

Wang Xiaoxiao stuffed a booklet about the popularization of science about the disease to the barbecue stall owner prepared in advance, "Read it yourself." ”

After stuffing the information, Wang Xiaoxiao was about to carry the sampling box into the barbecue restaurant.

The barbecue stall owner stood in front of Wang Xiaoxiao, "What do you want to take?" ”

"It's very simple, where is your usual barbecue materials, where is the kitchen?"

The owner of the barbecue stall had no intention of letting the disease control personnel in, and began to explain again, "The skewers in my barbecue restaurant are all skewered by themselves, and the materials are absolutely fresh......

Gu Yanan walked up to the owner of the barbecue stall with a calm voice, "You have a flushed complexion, a blister rash on your face and the back of your hands, and sweat on your forehead and palms, have you had symptoms of fever, sweating, body aches and fatigue recently?" ”

What Gu Yanan said was completely consistent with the boss's symptoms, and the boss was shocked and asked, "How do you know?" ”

"Your symptoms are early symptoms of brucella, which means that you have been infected with brucella, the source of infection should be in your own barbecue restaurant, we are here today to find out what the source of infection is, and you had better go to the hospital as soon as possible, otherwise it will affect the treatment effect for a long time, especially the fertility in the future."

The owner of the barbecue stall was frightened, immediately got out of the way, and took the initiative to take someone to the back kitchen for inspection.

The back kitchen of the barbecue stall was cluttered with all kinds of barbecue skewers, and Wang Xiaoxiao and Gao Fei took some of each skewer and put it in the sampling box.

Gu Yanan noticed that the flesh on the leg of the lamb hanging from the horn of the half sheep had been cut, and only the bloody leg bone was hanging in the air.

Gu Yanan asked the boss who was following him, "Where are the sheep in your store supplied?" ”

"Green Valley Ranch in the eastern suburbs, that is our famous ranch in Lianhai City, the beef and mutton in my store are all imported from Green Valley Ranch, and the goat milk is milked and delivered on the same day."

The barbecue stall owner said as he pointed to the half-barrel of milky liquid on the cupboard, "This is just delivered from the ranch today, it's still hot, I drink a glass every day." ”

Gu Yanan smelled the faint fishy smell of goat's milk and asked, "Do you drink raw goat milk?" ”

"Yes, raw goat's milk is nutritious."

Gu Yanan instructed Wang Xiaoxiao, "Pick 500 milliliters from this bucket of goat's milk and bring it back." ”

Wang Xiaoxiao quickly took out the goat milk, packed it with the sampling bag he brought, put it back in the sampling box, and reminded the barbecue stall owner at the same time, "Raw goat milk, raw milk, and all unsterilized raw milk cannot be drunk directly, otherwise, it will be infected by the pathogenic microorganisms inside." ”

The barbecue stall owner sweated even more on his face and asked in horror, "You mean I may have a cloth disease?" And it could be caused by drinking raw goat's milk? ”