Zhang Xiaobin, as the owner, the teacher and friends came from afar, and were preparing to boil water to make tea in the house, and saw Mr. Nan staring at the fishing nets in the yard during the boiling of water, and hurriedly stepped forward to explain: "My dad usually likes to go fishing during the slack time, but this time he was sick and hospitalized, and the fishing nets were confiscated." ”

As he spoke, Zhang Xiaobin was ready to step forward and take off the aquatic plants in the fishing net and put the fishing net away.

The hand stretched out, but before it touched the fishing net, it was suddenly stopped by Nan Zhiqiao.

Zhang Xiaobin looked at Nan Zhiqiao questioningly, Nan Zhiqiao's hand was slightly forced, and Zhang Xiaobin took a step back from the front of the fishing net, "Don't get close!"

Zhang Xiaobin is a little inexplicable, is there something wrong with the fishing net?

In Xiao Bin's questioning eyes, Nan Zhiqiao explained: "This fishing net is likely to have been exposed to infected water, you see, what is this?"

Nan Zhiqiao pointed to a clump of aquatic plants hanging from the fishing net, and the aquatic grass was mixed with a conical conical shell with a smooth surface.

"It's been a long time since I've seen a snail in the neighborhood. Zhang Xiaobin remembered what happened before, "When I was a child, snails were still very common, but later, after the snail eradication operation, snails were rare, but I didn't expect them to appear again." ”

Nan Zhiqiao: "Snails are the intermediate host of schistosomes, and where there are snails, they are easy to transmit schistosomiasis. ”

Zhang Xiaobin ran back to the house, came out with gloves, picked up the snails, completely spread out the fishing nets, and dried them in the sun. ”

Nan Zhiqiao was very interested in the source of the snails in the fishing nets, "Xiaobin, where is the place where your father often goes to fish?"

"There is a canal in the back mountain, there are a lot of wild rod fish, my dad often goes to the canal to fish, when I was a child, rod fish is the most common dish in our family, in recent years, more and more people are fishing, the number of rod fish is getting smaller and smaller, my dad goes down the river to fish less often, only when the farm is slack. ”

"Rod fish?" Nan Zhiqiao couldn't help but be curious when he heard about rod fish for the first time.

"Rod fish is our local name, in fact, it is a small local wild fish, although small, but the taste is very delicious, is a very famous specialty here. ”

"Oh, I remember, the rod fish is a special product in the Erhai Sea system, and it has recently been listed as a national second-class protected animal. ”

"Although it is a national second-class protected animal, there are still many people who go down to the river to fish, and we are located in a remote area, no one cares, and the villagers often catch fish and come back to improve their lives. ”

Nan Zhiqiao's eyes looked left and right on the fishing nets scattered in the courtyard, Zhang Xiaobin, as a student who had been studying with Nan Zhiqiao for more than three years, understood every look of Nan Zhiqiao.

"Mr. Nan, do you suspect that the schistosomiasis contracted by my parents and sister is related to going to that canal to fish?"

"It must be related, other schistosomiasis patients also live near the canal, but, why did they get sick at this time?" Nan Zhiqiao asked.

Zhang Xiaobin was also thoughtful, "I also think it's strange, the canal has always been here, I used to swim there when I was a child, no problem, when I came back last summer, I also went down the river with my father, and there was nothing unusual at that time." ”

"The time when the problem could have been locked in this year, for some reason, schistosomiasis polluted the river water, turning the normally clean canals into infected water. ”

Zhang Xiaobin was worried about his family and the villagers around him, and he was even more worried about the sudden appearance of schistosomiasis, and couldn't help asking: "How could schistosomiasis suddenly appear in the originally clean river water?"

Nan Zhiqiao has an understanding of the history of disease control throughout the country, and analyzed: "This was the hardest hit area of schistosomiasis before the liberation, after the founding of the People's Republic of China, after decades of blood prevention work, it was basically controlled, and a large-scale outbreak like this may be the original hidden source of infection, because of some reasons, it has spread again, or it may be some other unknown reason, to determine the cause and further prevention and control of schistosomiasis, we have to go to the epidemic water to check." ”

"Mr. Nan, are you going to the canal? Now?"

Nan Zhiqiao nodded, "Well, the sooner the better." ”

Zhang Xiaobin was thinking about the next itinerary in his heart, if he went to Houshan Water Canal according to Mr. Nan's requirements, then he would have to walk a long mountain road, although Mr. Nan's physical strength looked very good, but there was also Mr. Xiaoye and her cousin Qianqian, if the four of them went together, they would have to take a slightly smooth road, but in this way, they would have to take a detour and delay a lot of time.

Zhang Xiaobin was thinking on the side, but Nan Zhiqiao saw Xiaobin's entangled face and asked, "What's the matter?"

"Eh, is Mr. Xiaoye going with us?"

Nan Zhiqiao looked at Ye Zhenzhen, who was making tea in the house, the corners of her mouth were slightly upturned, and she said softly: "She will definitely go." ”

After making tea, Ye Zhenzhen waved her hand towards the courtyard and motioned for the two to enter the house to drink tea.

The room was filled with the fragrance of jasmine tea, and as soon as the two entered the house, Ye Zhenzhen pointed to the tea on the table and said to Zhang Xiaobin: "Xiaobin, this is the tea found in the drawer, I saw that it had been opened, so I brewed a little." ”

Zhang Xiaobin had already smelled the fragrance of jasmine tea, smiled shyly, and said: "I only have jasmine tea at home, and this tea is still fried at home, and the tea tree is on the back mountain." ”

Nan Zhiqiao picked up a cup, took a sip, and praised: "Good tea!"

Qianqian had been crying out her thirst all the way, and after two cups of tea, she came to her senses, "Sister, when are we going to go out to play?"

"Play?" Ye Zhenzhen sighed, a little regretful that she had traveled thousands of miles to bring her cousin here, "We are here for a mission, not a tour." ”

Qianqian was hit by her cousin, but she was not discouraged, "You carry out the task, I will follow you and be your assistant." ”

"Our missions are all dangerous, and you stay here. ”

"No, I'm going to follow you. ”

"No, if you want to play, when the matter here is resolved, I will take you to the ancient city of Dali for a turn. ”

"No, I'll go wherever you go. ”

Qianqian knew her cousin's temper, and it was difficult to change things once she decided, but now it was different, her cousin had a boyfriend, and Qianqian hid behind Nan Zhiqiao in a ghostly manner, pretending to be an aggrieved voice: "Brother-in-law, shall I go with you?"

This "brother-in-law" was very useful to Nan Zhiqiao, Nan Zhiqiao looked at Zhen Zhen and smiled: "Zhen Zhen, why don't you stay here with Qianqian, and I will go to the nearby canal with Xiaobin?"

"No, I'm your research assistant, how can I not go?"

Nan Zhiqiao looked embarrassed, "Oh, that's it, but Xiaobin is familiar with the terrain here, and he will definitely come with me, if you also go, stay at home alone, and you don't feel at ease." ”

Nan Zhiqiao really spoke for Qianqian, and Zhen Zhen also understood in her heart that if she brought Qianqian this time, if she was not allowed to join in the fun, she would definitely not be willing, Ye Zhenzhen finally nodded and agreed, "Okay, Qianqian is with us, but you can't move when you encounter dangerous things." ”