Gu Yanan hurriedly ran into the house, looked upstairs and downstairs, and didn't find Uncle Ge.

Uncle Ge is not at home? Could it be that he followed him to the hospital later? Probably not.

Just as he was about to look around again, Gu Yanan found a figure shaking in the glass flower room in the courtyard.

Gu Yanan rushed into the glass flower room and found that Uncle Ge was taking care of the flowers and plants in the flower room.

"Uncle Ge?"

Uncle Ge finally responded, and when he looked back at Gu Yanan, he was surprised, "Yanan, why are you here?" You haven't come to see Uncle Ge for a long time, why did you suddenly remember? ”

"I met Nan Hanfei in the hospital just now."

"Xiao Nan? Oh, I remember, I think I'm asking him to do something for me at noon? ”

Uncle Ge's Alzheimer's disease is getting more and more serious, and he often forgets what just happened, because of this, his son abroad contacted a nanny for him, but he didn't expect the nanny to have an accident, but fortunately, there is Nan Hanfei, an enthusiastic neighbor.

Gu Yanan wanted to know if Uncle Ge had been exposed to suspicious substances, so he reminded, "Uncle Ge, do you remember your nanny?" ”

"Xiao Song, of course I remember, she is the nanny my son hired for me, if you talk about relationships, she is still a distant relative of our Lao Ge family."

"Do you remember what she did this morning? What food has been prepared for you? Or has she eaten or used something? ”

"Xiao Song has returned to her hometown, she hasn't come back yet, her family lives in Zhaojia Village, Yuntai County, she said that the Chinese New Year is approaching, and the family has prepared goods for many years, and she wants to go home and bring me some...... Oh, with New Year's goods? Xiao Song seems to have come back, she brought me grass eggs, local pork, and said that she would stew me fresh pork ribs at noon......"

Zhaojia Village, Yuntai County?

As soon as there was an outbreak of human infection with Streptococcus suis in Zhaojia Village, the nanny from Zhaojia Village fell ill, and she had just returned to her hometown to bring special local pork.

It can't be such a coincidence, right?

Gu Yanan's professional sensibilities made her immediately think of the connection between the two.

"Uncle Ge, where is the local pork she brought back? Have you ever eaten it? Gu Yanan asked anxiously.

"The things that Xiao Song brought back are all in the kitchen on the first floor, Xiao Song is chopping pork ribs early in the morning, and there are still a few lotus roots, Xiao Song is going out to buy them, is she back?"

Uncle Ge's thoughts were confused, but Gu Yanan had already grasped the point, and hurriedly ran to the kitchen on the first floor, and found that there was a lotus root pork rib soup on the kitchen stove that had not yet been cooked.

Gu Yanan assumed in his heart that these pork ribs brought back from Zhaojia Village by the nanny were likely to be sick pork, and the nanny Xiao Song may have been infected by Streptococcus suis when she was handling the pork ribs with her bare hands.

The shortest incubation period for human infection with Streptococcus suis is only a few hours, and judging from the time when the nanny Xiao Song handled the pork to the time of her illness, it is entirely possible that she was infected.

"Uncle Ge, have you ever drunk these lotus root pork rib soup?"

Uncle Ge saw Gu Yanan hurriedly running into the kitchen, and followed curiously, "Is the pork rib soup ready?" I haven't drunk it, what about the little Song people? ”

"Xiao Song is in the hospital, don't move these pork rib soups, and I will take the rest of the pork with me."

"Xiao Song is in the hospital? Oh, by the way, I remembered, Xiao Song was sick, Xiao Nan took her to the doctor, why did she take the pork? Is there something wrong with these porks? ”

"Xiao Song's illness may be related to pork, so I have to take these pork back to the CDC laboratory for testing. Uncle Ge, do you know the address of Xiao Song's hometown? And her experience these days, where did she buy the pork from? ”

"I heard Xiao Song mention that these porks are raised by her own family, don't you want to celebrate the New Year, kill pigs and cut New Year's meat, and by the way, take some to my distant relative."

"Kill your own pigs? Are Xiao Song and Zhao Yongfa's family related? Could this meat have been bought by her from Zhao Yong's family, or was it sent to her by Zhao Yong? ”

"Xiao Song said that most of their Zhaojia Village is surnamed Zhao, and there are only a few surnamed Song, and the relationship between the two surnames is average, since Xiao Song said that the pork was killed by her own family, it must have nothing to do with the surname Zhao."

If it is really as Uncle Ge said, the pork of the nanny Xiao Song is not from Zhao Yong's family, then there are other sources of infection in Zhaojia Village.

Gu Yanan remembered that Section Chief Zhang of the county disease control had said that there was also a family surnamed Song in Zhaojia Village who had also killed sick pigs, and two of them became ill.

Is the nanny Xiao Song related to this family?

Gu Yanan immediately called Zhou Lao and his entourage, who were going to Zhaojia Village in Yuntai County, and told them that there might be a source of streptococcal infection in the pig herd in Zhaojia Village, and asked them to focus on investigating the health of the pig herd in Zhaojia Village, and sent the information of the Song family who had become ill.

Then he called Nan Hanfei again, "Nanny Xiao Song may have been infected with swine streptococcal disease, she brought some pork from her hometown Zhaojia Village, Yuntai County, I found it at Uncle Ge's house, and I am about to bring it back to the CDC laboratory for testing, you can report this situation to Xiao Song's attending doctor, and Uncle Ge, I will ask a community nurse to help take care of it temporarily." ”

"Okay, you get busy first."

——

Lianhai Center for Disease Control and Prevention, Laboratory.

The pork that Gu Yanan brought back from Uncle Ge's house first asked Section Chief Li of the Laboratory Department to do a rapid PCR test for Streptococcus spp. and Streptococcus suis species-specific genes, all of which were positive.

The strain was also isolated from the specimens of patients in Zhaojia Village sent by Yuntai County Disease Control and Prevention.

Gu Yanan personally checked in the laboratory and found that small colonies with grass-green hemolytic rings appeared in the petri dish, and after biochemical identification, it was determined that it was Streptococcus suis type II, which is a highly pathogenic streptococcal species to humans.

Sure enough, the nanny Xiao Song and Zhao Yongfa's family were both infected with Streptococcus suis.

The results of the experiment came out, I don't know how Zhou Lao and his entourage checked the source of infection in Zhaojia Village?

——

Yuntai County, Zhaojia Village.

Zhou Lao, Lu Li, Xiao Chu and the staff of the Yuntai County Disease Control and Prevention Department are inspecting the big white pigs raised by each family one by one in Zhaojia Village.

Approaching the end of the year, the big white pigs raised by each family are fat and strong, and they have reached the standard that they can be slaughtered.

After investigation, it was found that except for Zhao Yongfa and the nanny Xiao Song, the other families in Zhaojia Village who began to kill pigs and cut New Year's meat did not take action.

Zhou Lao brought a rapid detection kit for Streptococcus suis, collected pig nose swabs on site, and the results were available in more than 40 minutes.

All the pigs in Zhaojia Village were checked and found that the positive rate of Streptococcus suis was as high as 30%.

Whether the Streptococcus suis carried by these pigs are all type 2 Streptococcus suis that can infect humans requires further laboratory testing.

Zhou Lao took Xiao Chu and Lu Li to collect samples from all the pigs in Zhaojia Village, put them into the sampling box, and prepared to take them back to the laboratory of the Municipal Center for Disease Control and Prevention for the next step of testing.

Although the next step of typing has not yet been done, such a high carrier rate in the pig herd in Zhaojia Village indicates that the pig herd is a potential source of infection and needs to be treated as soon as possible, otherwise more villagers will be infected during contact with pigs.

Mr. Zhou and Section Chief Zhang of the local county CDC approached the village chief of Zhaojia Village and publicized human infection with swine streptococcal disease in the entire Zhaojia Village through the village chief.

If a sick pig is found, it should be reported in a timely manner, and it should not be slaughtered or eaten, and pork from informal channels should not be purchased.

Zhaojia Village at the foot of Yuntai Mountain is not large, and the villagers are also familiar with each other, knowing that Zhao Yongfa's family has died, everyone else is seriously ill and hospitalized, and the nanny Xiao Song's family has also fallen ill one after another.