The monitoring content is that patients with fever with arthralgia, rash or bleeding spots, and one of the symptoms of musculoskeletal pain in designated medical institutions in these areas are collected, and blood samples are collected to carry out chikungunya virus nucleic acid testing.

Li Bai submitted the emergency monitoring plan to Director Yang, which was affirmed by the city's emergency response team and began to implement it immediately.

After nearly 10 days of emergency monitoring, the monitoring results were obtained.

The nucleic acid positivity rate of chikungunya virus was 87.8% in the core area> 46.4% in the alert area > 5.4% in the monitoring area.

Previous field data showed that chikungunya cases were still confined to the Sinchon community and that the outbreak had not yet spread.

Through emergency monitoring in the past few days, two new epidemic sites have been found in addition to the Xincun community, and the epidemic has been brought under control by treating patients and fighting mosquitoes in a timely manner.

In the process of participating in the handling of the epidemic, Lin Xiaoxiao found that although the emergency team was the first to discover and confirm the epidemic, it still needs active efforts from all sides to control the entire epidemic.

There are only 6 people in the CDC emergency team, and in the later stage of epidemic prevention and control, their role is to provide technical guidance and strengthen the technical teams of various departments that have joined the joint prevention and control.

The hospital is training medical staff in chikungunya fever diagnosis and treatment techniques, epidemic reporting, disinfection and isolation, hospital infection control, personal protection and other related knowledge, and has strengthened the screening and diagnosis of fever, joint pain, and rash cases.

The staff of the Municipal Center for Disease Control and Prevention carried out technical training for the sanitizing personnel in the knowledge of the prevention and control of insect-borne infectious diseases, mosquito control and prevention, removal of mosquito breeding sites, mosquito control scope, drug dose, equipment use methods and treatment cycles.

It was the first time for Lin Xiaoxiao to participate in such a large epidemic prevention and control work, and he listened to Li Bai's command every time he acted, and he did his best.

In addition to frequent on-site visits and technical guidance in the early days of the epidemic, the emergency response team led by Li Bai also participated in media communication and public interaction.

Since the outbreak of chikungunya fever in Yunhai City was confirmed, the relevant departments have set up a news and information team and designated a spokesperson, although Li Bai is not the spokesperson, he is responsible for reviewing the data in the speech.

He also assists the Health Education Department in making some cartoons and videos for popular science publicity.

Lin Xiaoxiao and the other members of the emergency team were on the side to help.

was a little anxious, Li Bai suddenly stopped what he was doing and retrieved the medical record information that had been transferred before.

"Team Li, is there a problem with this information?" Lin Xiaoxiao asked suspiciously.

"The information is fine, but I'm going to find the problem from inside. ”

"Huh?"

"What is the main responsibility of our emergency response team?"

"Detect the epidemic and control the epidemic. ”

"Yes, we haven't found the initial source of infection of this outbreak, there is no natural foci of chikungunya in China, where did the first cases of this outbreak come from? How did they come in? ”

"yes, I've been busy for the past two days. ”

Several members of the emergency response team compared the previous investigation data one by one and found that the first patient to become ill was an old woman.

The old man's name is Li Cuilan, 61 years old, a retired teacher from a middle school, living in the Xincun community, and the date of onset is June 25, the earliest known time.

And Li Cuilan has been questioned in detail, she has no recent history of traveling abroad, and she has not even been out of Yunhai City.

"Let's go, go to Li Cuilan's house, and make a second adjustment. Li Bai gave an order.

——

Wan'an Street, Xincun Community, Li Cuilan's home.

Li Cuilan has been discharged from the hospital and is now recuperating at home.

Li Bai showed his work card to explain his intentions.

Seeing that the disease control personnel came to the door, Li Cuilan warmly welcomed in.

"Check whatever you want, you can take samples of everything at home, and if you have any questions to ask me, I will cooperate. ”

A district CDC came to Li Cuilan's house to investigate once before, she was very clear about the process, and this time the city CDC came again, and she was also very cooperative.

As soon as he entered the door, Li Bai looked around and found that there were many flower pots and many aquatic plants.

And some aquatic plants are species that are not common in the local area.

Lin Xiaoxiao also stared at these aquatic plants, there is water in the water basin of aquatic plants for a long time, and there will be mosquito breeding, which is a risk factor.

"Auntie, you have a lot of aquatic plants, how often do you change the water?" Lin Xiaoxiao asked.

"It's a month, and I don't change it often, so I usually add some nutrient solution to them, and they grow very well. ”

If you don't change the water often, you can easily develop mosquitoes.

Li Bai found mosquito larvae floating in the basin of one of the aquatic plants.

After so long of mosquito catching and eradication work in the community, there are still mosquito larvae in Li Cuilan's house, and it seems that the transmission route has been found.

It was supposed that the mosquito carrying the chikungunya virus bit Li Cuilan and made her sick, but where did the virus in the mosquito come from?

Mosquitoes are the route of transmission, and the initial source of infection is still uncertain.

Yang Le was puzzled, and asked Li Cuilan again, "Aunt Li, have you really not been abroad recently?"

"I have never been out, I have never been abroad in my life, and the closest time I came abroad was to go to the international airport to send my son on a business trip abroad. ”

"When did your son go abroad?" asked Li Bai.

"My son travels abroad a lot, most recently I think he went to Cambodia more than two months ago. ”

Cambodia is an endemic area for chikungunya, and people who have been there are likely to be infected.

"What's your son's name, has he been to your house lately, and where does he live?"

"My son's name is Li Jianguo, he is very filial, he often comes to visit me, at least once a week, and he lives not far from me, in this new village community, in room 702 of Building 9. ”

Li Bai's mind quickly flashed the list of people who tested positive for nucleic acid tests in the city during the epidemic, and there was no one named Li Jianguo.

Could it be that the source of infection is not Li Jianguo?

The city's nucleic acid test for this epidemic was a week ago, and if Li Jianguo was infected after returning from a business trip to Cambodia, he would not be able to test positive for nucleic acid two months later.

To check whether he has been infected with chikungunya, he needs to be screened for previous infections with antibodies.

"Aunt Li, can you recall that after your son came back from Cambodia, did he have a fever, rash or symptoms similar to a cold? ”

Aunt Li thought about it and nodded, "I remember that he came back from Cambodia at the end of May, and after he came back, he felt a headache, felt uncomfortable, and had a rash on his body, so he took leave from the company and went home to rest for a week." At that time, I also said that he didn't have a rash when he was a child, but when he grew up, he had a rash. But I didn't take much medicine that time, and I was fine. ”

After returning from the epidemic area, there are symptoms of infection, and it seems that the initial source of infection of this epidemic can be initially locked, and the next thing is to find this Li Jianguo for antibody testing.