"Two days ago, I shook hands with Mrs. Zhang."

"I also ate the dumplings that Mrs. Zhang gave me."

"I'm also feeling unwell now, comrade from CDC, can you give me a check-up too?"

Gu Yanan looked at Gu Qingcen beside her, Gu Qingcen immediately understood what she meant, and took out the blood collection tube from the sampling box.

"Just take a tube of blood and you can find out if you're infected."

The old ladies stared at the blood vessels and asked, "Does the examination cost money?" ”

"No, it's free."

Gu Qingcen drew blood from the old ladies one by one.

There were a total of 6 old ladies chatting by the garden, and when the penultimate one was drawn, the old lady stared at Gu Qingcen for a long time and said, "Young man, there is a sister in our group of old ladies who chat, who lives on the first floor of the last row of buildings in the community, and she hasn't come for two days, can you go with me to her house and take a blood test for her?" ”

"Yes."

Dongping Community, the westernmost row of buildings.

It is also the home of the sister who didn't come out to chat for two days.

This is the same layout as Mrs. Zhang's house, it is also a floor, and there is a small garden of its own outside.

Knock on the door, no one answers.

The old lady was anxious, and muttered: "Liu Xiaomei also lives alone, and her children don't come to see her once for 10 days and half a month, don't really have anything wrong." ”

Gu Yanan observed the gate of the small courtyard and found that the courtyard gate was locked inside, which means that there were people inside, but there was no response, and the situation was not good.

Gu Yanan decided to climb over the courtyard wall and open the courtyard door from the inside.

Gu Qingcen grabbed Gu Yanan, "I'll come." ”

Gu Qingcen put down the sampling box, easily crossed the wall of the small courtyard, entered the small courtyard, and opened the courtyard door from the inside.

Gu Yanan entered the small courtyard with the onlookers and the old ladies.

The old lady who was familiar with Liu Xiaomei pushed open the second door in the small courtyard, and a smell of blood came to her face.

The old ladies rushed to Liu Xiaomei's bedroom, followed by several screams.

Gu Yanan entered the bedroom and found an old lady lying on the bed, bleeding and purple, and it seemed that she had been dead for a while.

The screams of the old ladies were followed by cries.

"Liu Xiaomei, what's wrong with you? How did you die? ”

"Looks like you're going to die?"

"It can't be poisoned, right? The poisoning I watched on TV was also bleeding. ”

"No matter how you die, call 110 to call the police."

Twenty minutes later, police cars roared in.

A cordon was quickly set up around the residential unit where Liu Xiaomei's house was located.

The police led the team by Nan Hanfei.

Because the report said that there was a dead body, the police force also brought colleagues from the forensic doctor and the trace examination department.

Before the police entered the scene, Gu Yanan specially reminded them to do a good job of self-protection.

When the police saw people with disease control at the scene, they immediately reacted that what was going on inside might be related to infectious diseases, and they were more careful.

Gu Yanan, Gu Qingcen and a group of old ladies were eyewitnesses to this incident, and Nan Hanfei asked the police to make a record of the old ladies.

Police officer Xiao Li led other team members to conduct a scene investigation, while Nan Hanfei personally inquired about Gu Yanan's situation.

"Who was the first person to enter the scene?"

"Gu Qingcen was the first person to enter the small courtyard and open the door from the inside, but the first person to enter the deceased's bedroom was not him, it was the group of old ladies."

Nan Hanfei looked at Gu Qingcen and asked, "After you entered the small courtyard, did you find anything wrong?" ”

Gu Qingcen shook his head, "After I climbed over the wall and entered the small courtyard, I found that the latch of the courtyard door was buckled from the inside, and it was not locked, so I pulled the latch and let the others in."

Everything in the yard is neat and there are no traces of human turning. Personally, it doesn't look like someone has sneaked in.

After finding the deceased, we did not let the old ladies get close to the scene of the destruction. ”

Gu Yanan began to express his opinion, "Although we did not destroy the body, but through external observation, I think that the cause of death of the deceased may be related to an infectious disease, and the reason why our disease control came to investigate this time is because of this infectious disease? ”

"What disease?"

"Hemorrhagic fever with renal syndrome."

"Caused by hantavirus, it's related to mice!" Nan Hanfei's blurted out words that surprised both Gu Yanan and Gu Qingcen.

How could Nan Hanfei, a police officer, be so familiar with infectious diseases?

Although Gu Yanan knew that Nan Hanfei had a medical background, the level of familiarity was indeed amazing.

Soon, the policeman Xiao Li ended the scene investigation and ran over to report to Nan Hanfei, "Boss, the trace examination and forensic doctor said that there were no traces of fighting and violence at the scene, and he was ruled out as a homicide, and the evidence collection at the scene has been completed, and the comrades from the disease control can come in for sampling." ”

Police officer Xiao Li and Nan Hanfei have also cooperated with the CDC emergency team many times, knowing the work process, their police will complete the investigation first, and then the CDC team can carry out the next work.

Gu Yanan and Gu Qingcen were busy inspecting and sampling the deceased Liu Xiaomei inside, and inspected Liu Xiaomei's house and the surrounding environment.

In the kitchen of Liu Xiaomei's house, Gu Yanan found a few grains of mouse feces by the stove.

This can be one way in which the disease spreads.

Gu Yanan's mind flashed through the possible way that Liu Xiaomei was infected with the disease: the rats carrying hantavirus contaminated the food of Liu Xiaomei's house through feces, and Liu Xiaomei ate the contaminated food and became infected.

After investigating Liu Xiaomei's home, Lu Li and Wang Xiaoxiao also caught the wild cats in Mrs. Zhang's yard and the garden in the center of the community.

After the investigation was completed at Liu Xiaomei's home, the rest of the work had to be handled by the police, such as notifying Liu Xiaomei's family to dispose of the body.

After greeting Nan Hanfei, Gu Yanan and Gu Qingcen walked back with the collected specimens.

Nan Hanfei looked at the back of Gu Yanan leaving, stunned.

The policeman Xiao Li rarely saw Nan Hanfei's look, stood aside, and couldn't help reminding, "Boss, chasing a girl has to be bold and careful, and be thick-skinned, if you continue to be so depressed, be careful that your sister-in-law is really chased away by others." ”

——

Lianhai Center for Disease Control and Prevention, Emergency Office.

The samples collected from the hospital and the Dongping community were quickly available.

The inpatient Mrs. Zhang, the deceased Liu Xiaomei in the Dongping community, an old lady in the chat sister group who had touched a stray cat, the stray cat and the dead mouse next to the pillow in Mrs. Zhang's house, the rat feces in Liu Xiaomei's kitchen, and the brown rats caught around the Dongping community were all detected with hantavirus nucleic acid.

The transmission route of the outbreak of hemorrhagic fever with renal syndrome in Dongping community was identified.

Hantavirus is present in wild mice around the community, and stray cats spread hantavirus among the population in Dongping community by catching wild mice.

Gu Yanan stared at the inspection report, frowning slightly.

Gu Qingcen saw Gu Yanan's expression and asked: "The transmission chain has been clarified, the hospital treats the patient according to the plan, and our disease control and control do a good job of publicizing rodent prevention and extermination among the masses, everything will be fine, what are you still worried about?" ”

"I am worried that there will be an outbreak outside the Dongping community, this time it is an epidemic of hemorrhagic fever with domestic mouse kidney syndrome, the source of transmission is very widely distributed in our Lianhai City, and now there is the first epidemic, there may be other epidemics one after another, and it is necessary to do a good job in monitoring the density of rats in Lianhai City."