Halfway up the mountain, this spring is bubbling from the ground.

The spring is surrounded by fine soft gravel.

Under the midday sun, there is a special reflection in the center of the sand.

Gu Yanan was curious, leaned down, put his hand into the water with gloves, and tossed with the sand and stones, and found a glass bottle under the pile of sand and gravel in the reflective place.

The glass bottle was fished out and it was found that it was not an ordinary bottle, but a bacterial culture flask commonly used in the laboratory.

The flask contains a yellowish liquid with a thin film covering the mouth of the flask, and the film is wrapped with a string.

Gu Yanan chuckled in her heart, and a sense of worry and fear froze her whole body in place.

Why do things in the laboratory end up in mountain springs?

What exactly is the yellow liquid inside?

Is it related to this outbreak of diarrhea caused by Shigella?

The nameless blonde male corpse found by the Burning Incense River, the bioterrorism report that was previously determined to be an oolong case, the blonde hair found in the abandoned factory, and a large number of discarded bottles and cans of experimental equipment used to cultivate bacterial strains......

All these signs and the culture flask that Gu Yanan just fished out of the spring, what is the connection between all this?

Just as Gu Yanan was trying to connect all the clues in his mind, suddenly someone behind him shouted, "Sister Yanan, we're back, what are you doing?" ”

Wang Xiaoxiao and Zhou Lao and his party came down from the mountain, and Gu Yanan came back to his senses, "You guys finished checking the top of the mountain so quickly?" ”

Wang Xiaoxiao: "We checked the monitoring, and with the help of the staff of the scenic spot, we didn't find anything suspicious." ”

Zhou Lao found the experimental bottle that Gu Yanan was holding in his hand, and asked in surprise, "Where did the bottle come from?" It looks like a lab-grown bacteria. ”

"It was found in the spring, but that's not the point now, and now we have to go to the Nanxiang River downstream of the first street to check whether the water there is polluted by the spring water that flows in."

Gu Yanan and his party came down from Nanshan Mountain and turned to the bank of the Nanxiang River.

Water samples are taken along the river for direct on-site inspection.

The rapid test reagent came out quickly, and the test strips showed two red bars, and Shigella tested positive.

As you get farther and farther away from the confluence of the mountain spring, the red line of the test strip becomes weaker and weaker until it becomes a red line, indicating a negative one.

Seeing the test results, everyone except Gu Yanan breathed a sigh of relief.

Lu Li: "The source of infection has finally been found, that is, the mountain spring water on Nanshan Mountain and the downstream section of the spring water flowing into the Nanxiang River, as long as the source of infection is controlled, the epidemic situation near Nanshan Town can be solved this time." ”

Wang Xiaoxiao: "What's the use of only controlling the source of infection, but also cutting off the route of transmission." ”

Gao Fei: "It is also necessary to protect the susceptible population, the central primary school of Nanshan Town, and some enterprises with a relatively high concentration of personnel, these are all people with a high incidence of diarrhea. ”

Gu Yanan assigned tasks to everyone in the CDC emergency response team, "Gao Fei contacted Xicheng District CDC and Nanshan Town Hospital to isolate and treat patients in hospital or home to prevent the spread of the epidemic, and at the same time disinfect the spring water on Nanshan and the lower reaches of the Nanxiang River."

Lu Li contacted the Nanshan Town Government and the Yijie Village Committee, and used loudspeakers or other means to inform residents that if they have gastrointestinal symptoms such as diarrhea, vomiting, and fever, they should go to the health center as soon as possible.

Wang Xiaoxiao contacted the Sanitizing Department of the Municipal Center for Disease Control and Prevention to sanitize the environment, garbage, toilets, etc. inside and outside the village street festival.

Zhou Lao contacted the pharmaceutical factory to transfer a batch of haloperic acid to carry out preventive medication for the central primary school of Nanshan Town and several enterprises with relatively concentrated personnel. ”

"Okay." Each member of the emergency response team received their assignment and began to get busy.

Gu Yanan returned to the city CDC with water samples and glass bottles found under the sand and stones of the spring.

——

4 p.m. on the same day.

Lianhai Center for Disease Control and Prevention, Laboratory.

Gu Yanan handed over the water samples and glass bottles brought from Nanshan Town to the laboratory, and at the same time instructed that the glass bottles should be tested in detail and bacteria cultured.

Section Chief Li of the laboratory department agreed, and at the same time told Gu Yanan about a large instrument that had just arrived in the afternoon.

"Director Gu, the sequencer ordered last time has arrived, and the engineer is discussing with us the installation time, when you bought this sequencer, you were also one of the applicants, do you want to come and have a look when the engineer installs it?"

Gu Yanan is looking forward to the tester being sent over and installed as soon as possible, since the last P3 laboratory explosion, the CDC's bacterial strain library has been almost destroyed, and all the bacterial strains have to be re-collected and stored, this time there is an outbreak of diarrhea cases, this is a good opportunity to collect typical bacterial strains.

With this new sequencer, the future gene sequencing does not need to be sent to other companies, and the laboratory of the CDC can do it, the sequencing is convenient, and the experimental results are guaranteed, which is a good thing.

"Okay, you can notify me when you set a time."

"Your emergency team is very busy, we can cooperate with the time in our laboratory, do you think tomorrow morning can it?"

"Yes."

——

When he got off work that evening, Nan Hanfei arrived as promised.

Nan Hanfei took his luggage, which was taken by Gu Yanan, and lived next door to Gu Yanan's bachelor apartment, and became neighbors with Gu Yanan.

After Gu Yanan's overnight cleaning up last night, the style of the whole room is very similar to the old Nan family's old house before Nan Hanfei.

Nan Hanfei walked around the room and sighed, "Your former neighbor Aunt Li's decoration style is very similar to my family's old house, which is what I like." ”

Gu Yanan smiled awkwardly, thinking that I had rearranged this according to your style, but he still teased and said, "You are young, but your aesthetics are similar to an old aunt, is it good?" ”

"I'm called mature and steady."

"Okay, you are the most mature and stable, remember to clean on time and pay the utility bills on time."

"No problem, as a token of appreciation, I'll treat you to dinner tonight."

Gu Yanan glanced at the time, "Are you going out to eat?" ”

"Don't go out, I'll cook, let you taste my craft, are you used to eating Western food?"

"Yes."

Nan Hanfei put down his luggage and went into the kitchen, and found that firewood, rice, oil and salt had been prepared in the kitchen, and Gu Yanan was really careful in his preparation.

Soon, the simplest sandwich is ready.

A sandwich for each person, served on a dinner plate.

"Just eat this?" Gu Yanan stared at the two sandwiches on the table and frowned, "I thought it was a Western-style meal, but it turned out to be just two sandwiches." ”

"Time is in a hurry, I'm afraid you'll be hungry, let's have two sandwiches first, and as for the big meal, I'll talk about it when the case is solved."

Gu Yanan asked in surprise: "What case?" ”

()

Sogou