Gu Yanan thought in his heart that Wang Jianjun was infected with the West Nile virus at that time, probably because he was bitten by a mosquito carrying the virus on the African dock, and several African parrots he bought locally carried the West Nile virus.

This time, there was a case of West Nile virus infection in China, and the natural source of the virus was found, and it seems that the cause of the formation has been traced, which is the African parrot brought back by Wang Jianguo from the epidemic area in Africa.

Birds have entered the forest, viruses have entered a new ecological environment, and natural foci have been formed.

Although it is no longer possible to find the African parrots that escaped into the wetland park, we can find the genetic relationship from the isolated West Nile virus genes, find the strain closest to its evolution, and genetically infer the specific origin of the strain.

After the second flow of Wang Jianjun ended, before leaving, Gu Yanan told him earnestly, "African parrots are alien species, and they must have strict quarantine before they are brought into the country, and the next time they go out to the sea to bring things, as long as they are living creatures, they must be very careful, otherwise it is not only a biological invasion." ”

"It's not that exaggerated." Wang Jianjun disagreed with Gu Yanan's instructions.

"You've opened Pandora's box, and it could take decades, if not hundreds, to rid of the plague that came out of the box."

——

7:20 p.m. that day.

Lianhai Center for Disease Control and Prevention, Laboratory.

The serum test kit from Gu Yanan was delivered by air express, and the laboratory staff tested the serum of Wang Jianjun and other villagers in Wangjia Village overnight.

Wang Jianjun was positive for West Nile virus IgG antibody in serum.

The villager in the family who had horses was positive for IgG antibodies in the serum.

Other villagers also have positive serum IgG antibodies, with a positive rate of up to 30%.

This means that 30% of the villagers in Wangjia Village have been infected with West Nile virus.

Gu Yanan combined the test report of the laboratory with the flow data of the emergency team, wrote a report on the speculation of the formation of the natural epidemic foci in the Crescent Bay Wetland Park, and the investigation of the infection rate of the surrounding villagers, and handed it to Director Yang of the center, and then discussed the next prevention and control measures with the emergency command team established by the city.

Because it is the first time that local cases and natural foci have been detected in China, we have learned from foreign experience and formulated the next prevention and control strategy based on the previous prevention and control measures of other similar viruses in China, such as Japanese encephalitis and dengue fever.

Two weeks later.

The inpatients were discharged one after another, except for the only fatal case, Lao Zhang, the leader of the survey team, the other members of the survey team were discharged from the hospital.

After mosquito control, environmental disinfection, and stagnant water treatment, there were no new cases within two weeks, and the epidemic was temporarily controlled.

——

Lianhai Center for Disease Control and Prevention, Emergency Office.

Gu Yanan is writing a summary report on the West Nile virus outbreak.

Wang Jianjun, a seafarer from Wangjia Village, next to the Crescent Bay Wetland Park in Binhai District, Lianhai City, was infected with the West Nile virus when he was bitten by a mosquito at a dock in Africa during a sea voyage to Africa last summer. Two African parrots were purchased locally during the process.

The parrot contained the West Nile virus, and Wang Jianjun took the African parrot back to his home in Lianhai City without quarantine from the customs quarantine department, and accidentally released the African parrot into the woods of the nearby Crescent Bay Wetland Park during the breeding process.

Mosquitoes in the wetland bite the parrot carrying the virus, and then bite other native birds in the wetland, creating a mosquito-bird-mosquito transmission chain, forming a natural foci of the West Nile virus in the wetland park.

When villagers near the wetland park entered the wetland, they were bitten by mosquitoes carrying the virus, causing some villagers to be infected.

While the villagers were grazing their horses in the wetland, the horses were bitten by mosquitoes carrying the virus and contracted the virus, resulting in the death of two horses and the insidious infection of many horses.

When the survey team entered the wetland, they were bitten by mosquitoes carrying the virus, and all of them were infected, and some of the team members showed symptoms of encephalitis and meningitis, among which the team leader Zhang died, and the other team members recovered and were discharged after treatment.

After mosquito control and environmental management, the epidemic has been temporarily controlled, but the natural foci of West Nile virus have been formed, and it is recommended that West Nile virus surveillance be included as a routine surveillance project in coastal areas in the future.

After writing the summary report, Gu Yanan filed the report.

Although the West Nile virus outbreak has been temporarily brought under control and the handling of the epidemic has come to an end for the time being, no one in the emergency response team can easily get up.

The natural foci of the West Nile virus formed this time are like a ticking time bomb that could break out again at any time.

Gu Yanan watched everyone feel depressed and took the initiative to enliven the atmosphere.

"Everyone has worked hard lately, I'm having a treat tonight, let's discuss, where do you want to go for dinner?"

One sentence really enlivened the atmosphere in the emergency office, and everyone began to talk about it.

"Let's go eat hot pot, we just opened a Sichuan-style hot pot restaurant in the commercial street next to our unit, every time I pass by there, it smells very fragrant, I haven't eaten it yet, why don't you go and try it together?" Wang Xiaoxiao proposed.

Lu Li echoed, "Okay, it's the most lively and cost-effective way for people to eat hot pot." ”

Zhou Lao agreed, "I have already eaten that Sichuan-style hot pot restaurant, and the taste is really good for a family of three." ”

Xiao Chu also agreed, "It's good to eat hot pot, especially Sichuan-style hot pot, the spicier the better, I like it." ”

Goofy's face was a little embarrassed, "I made an appointment with my girlfriend to go shopping together tonight." ”

"The old rule, welcome to bring your family to participate, it is more lively." Gu Yanan immediately added.

"Okay, I'll get in touch with her now." Goofy starts texting his girlfriend about the dinner party.

Gu Yanan asked Zhou Lao, "Bring Sister Zhang and Lele together." ”

Sister Zhang is Zhou Lao's wife, and Lele is Zhou Lao's son Zhou Le.

"If you don't take his mother, Lele has to go to cram school at night, his mother picks him up every time, and he has to supervise his son's class."

"It's hard to be a parent." Gu Yanan sighed casually.

"Hard work and gain are always proportional, and you will know it when you have children." Old Zhou changed the topic, "When will you and Officer Nan get married and have children?" This person must get married early and have children as soon as possible, otherwise it will be difficult to bring up children when he is older. ”

It was rare for Zhou Lao to discuss private matters with Gu Yanan, and the entire emergency team was brought to this topic.

Wang Xiaoxiao asked in surprise: "Sister Yanan and Officer Nan are getting married?" ”

Lu Li: "Married? Is it true that you were in love? ”

Goofy: "Isn't it true that you said you were pretending to be a boyfriend and girlfriend?" When are you going to get married? Will it be ahead of me? ”

Gu Yanan didn't expect the topic to suddenly turn to her, her face was slightly embarrassed, and she quickly explained, "I haven't gotten married so soon, and it definitely won't be before Gao Fei." ”

Xiao Chu showed surprise on his face, and whispered to himself, "Sister Yanan is getting married, or with Officer Nan, this is the happiest thing I've encountered recently." ”