The chef's eyes are fixed on the hotel manager.

The hotel manager's eyes twinkle and avoid making eye contact with the chef.

Under Gu Qingcen's inquiry, the chef dragged out a few plates from the refrigerator in the back kitchen, "Are you talking about these dishes?" I was finished by the guests just now, and I was about to replenish it, but because it was all precious seafood, it was out of stock, and I didn't have time to replenish it. ”

The chef dragged out a few plates that were empty, and only a few drops of juice remained.

Gu Qingchen knew that this was because they had processed the dishes in advance.

Where will the dishes be processed? According to the general garbage disposal procedure, it must be poured into the kitchen waste bin.

Gu Yanan asked the rest of the emergency team to check the hotel's food waste.

Gu Qingcen looked through the refrigerator that the chef had just opened, and there were a lot of ingredients in it.

Gu Qingcen took out the briefcase he had just collected the dishes, which contained cold dishes and seafood, and after he took out these things, the faces of the chef and the hotel manager began to turn pale.

Find the sampling bag of the cold salad from it, put it in front of the chef, and ask, "Do you still have the raw materials for this cold conch meat?" ”

The chef shook his head, "No, I just ran out, and I haven't restocked yet." ”

"Such a coincidence? As soon as we came to check, it was out of stock. ”

Gu Qingcen seemed to be talking to himself, and seemed to be deliberately speaking to the chef and hotel manager.

The chef seemed to be stimulated and wanted to say something, but when he saw the hotel manager's eyes, he couldn't help but cough again and again.

"What's wrong with you?" Gu Yanan asked the chef.

"I've had a cold lately and have a bit of a cough."

"Do you feel any pain in your body?"

"My whole body hurts, sometimes I have a bad headache, I took leave to rest yesterday, and today the hotel is busy, I came to take a look."

Gu Yanan and Gu Qingcen glanced at each other, this chef actually had the first symptoms of parasitic infection.

Gu Yanan said to the chef: "The strange disease that has recently broken out in Lianhai City is a parasitic infection, you may have been infected, it is recommended that you go to the hospital for a detailed examination, it may be life-threatening after a long time." ”

The chef turned pale with fright, "I'll go now, if you have any questions, ask the manager, he knows everything." ”

——

Lianhai Center for Disease Control and Prevention, Laboratory.

After returning from the Golden Bay Hotel, colleagues in the lab worked overtime to test all the samples.

In a cold conch meat brought back by Gu Qingcen, the third-stage larvae of Angiostrongylus cantonensis were detected.

This cold dish is the one that Gu Qingcen secretly sampled in the cafeteria, and it is also the cold dish that was later withdrawn by the hotel manager.

The test results proved that there was indeed Angiostrongylus cantonensis in the cold conch meat of the Golden Bay Hotel.

Except for this cold conch meat, there is no problem with other dishes.

Combined with the results of the previous on-site investigation, people infected with strange diseases have eaten this cold conch meat from the Golden Bay Hotel.

Holding the test report from the CDC laboratory, Gu Yanan had questions.

The intermediate hosts of Angiostrongylus cantonensis are generally various freshwater snails, which have not been found in sea snails.

How can there be Angiostrongylus cantonensis in this cold conch meat?

Could it be that the meat in the coleslaw is not a conch, but a freshwater snail?

Gu Yanan asked his colleagues in the laboratory department to do an identification of the type of snail meat, but because the snail meat was very chopped, it was impossible to identify it from the appearance.

If the appearance cannot be identified, genetic testing must be done, but the disease control laboratory does not have the corresponding reagent reserves for the genetic detection of snails, and it is necessary to seek assistance from relevant scientific research institutes, which will take a long time.

To know the type of snail meat in cold dishes, in addition to laboratory testing, there is a more direct way, which is to ask the hotel manager directly, he should know the source and type of snail meat.

Moreover, after understanding the types of snail meat, it is necessary to trace the source, where is the origin of snail meat? Do parasite-infected freshwater snails enter other aquatic markets in Lianhai City? Only by knowing this can we control the further spread of the epidemic.

——

Golden Bay Hotel.

The CDC emergency team came to the hotel again to investigate the clues.

Gu Yanan found the hotel manager in the lobby on the first floor of the hotel, "Please show me the type of conch meat and the source of purchase of the conch meat in your hotel." ”

The hotel manager seemed to be very cooperative, and found the staff in charge of the purchase and handed over the previous purchase order to Gu Yanan.

There is no problem with the purchase order, the purchase time, the type of purchase, the merchant and the batch number of the purchase are very detailed, and the copy of the qualified inspection certificate provided by the merchant is also attached to it.

Everything looks impeccable, and the conch meat in this cold conch meat is from a regular source and the quality is guaranteed.

So why do parasites appear?

"Is the meat in this salad really conch meat?"

Gu Yanan stared at the hotel manager and asked again.

The hotel manager pretended to be calm, "Of course, if it's not conch meat, what else will it be." ”

Intuition told Gu Yanan, the hotel manager, that he was lying, but at present, he could not come up with evidence that he was lying, and he was helpless.

Gu Qingcen led the rest of the emergency team to carefully inspect in the back kitchen, but they did not find the freshwater snail meat, not even the shell of the freshwater snail.

Back in the hall on the first floor, Gu Qingcen shook his head slightly at Gu Yanan, indicating that he had found nothing.

Wang Xiaoxiao came up with an idea, "Sister Yanan, if we don't sample and test the snails in all the aquatic markets in Lianhai City, we can always find freshwater snail species infected by parasites." ”

Lu Lizhi shook his head, "Xiaoxiao, do you know how many aquatic markets we have in Lianhai City?" How many seafood stalls are there in a fresh supermarket? Thousands of families, right, this has to be sampled and investigated one by one, so it has to be done in the Year of the Monkey? ”

Wang Xiaoxiao was unconvinced, and looked helpless, "I also know that this is a stupid method, looking for a needle in a haystack, but do you have a better way?" ”

Lu Li: "Let the hotel manager tell the truth, if he doesn't tell the truth, let the police investigate him, tune up the nearby surveillance video, and see where they bought the goods from, I don't believe it, if the police intervene in the investigation, they won't find anything." ”

Wang Xiaoxiao snorted, "Do you think the police station is opened by your family, and you can do whatever you want the police to do?" Even if Sister Yanan asks Captain Nan to help with her personal relationship, the police will have to have a reason to investigate here. ”

"With such a big epidemic, can't you file a case?"

"This is an ordinary public health incident, and the government has not yet launched an emergency response, so what is the case?"

Gu Qingcen listened to the argument between Lu Li and Wang Xiaoxiao on the side, and suddenly interjected, "If a customer who has eaten cold snail meat dishes in this hotel is infected, the police will file a case for investigation." ”

Gu Qingcen got to the point in one sentence.

Wang Xiaoxiao immediately agreed, "This is a good idea, the patients with strange diseases in the hospital are worried that there is no place to vent and ask for compensation, so persuade them to let them report the case collectively to see if the hotel manager is telling the truth." ”

"Egging on the family? That's a good idea. ”

Wang Xiaoxiao was about to discuss with Gu Yanan to ask the patient's family to report the case, when suddenly, the mobile phone in Gu Yanan's pocket rang.

Caller ID brother Gu Yoshiki.

"Little sister, our hospital has just admitted a patient, and the laboratory department has just confirmed that it is Angiostrongyloides cantonensis infection, and he told me that he wants to see the person in charge of the CDC who is responsible for investigating the epidemic."

"You want to see me by name?"

"Well, he said that he had a situation to report to you, oh, his identity is the chef of the Golden Bay Hotel."

Gu Yanan remembered the chef he saw when he first came to the Golden Bay Hotel to investigate, he seemed to be a little reluctant to say anything at that time, he must know some inside story, and now that he has figured it out, he will definitely be able to provide important clues.