When Zhang Xiaobin arrived at the city hospital, his parents had been sent to the intensive care unit because they were in a coma.

Zhang Xiaobin stayed outside the intensive care room, helpless and without ideas.

The parents were lying unconscious in the intensive care unit for some reason, the second brother went to college in a distant city, in order to earn tuition, he didn't go home during the summer vacation, and worked in the university town, his parents didn't notify him of his illness this time, and his little sister was also sick and hospitalized in Beijing, and Zhang Xiaobin, who was in his twenties, felt very helpless.

The doctor asked Xiaobin for further medical history, Xiaobin was away from home for a long time and did not know the situation of his parents, but told the doctor in detail about the situation of his sister Xiaoxian.

My sister Xiaoxian once said that a month before she went to Beijing, she and her parents had gone to a canal near the village to catch fish, and for the next two days, all three of them had itchy symptoms, but they quickly eased.

According to Xiaobin's description, the doctor thought that Dali was a schistosomiasis-endemic area, and after a series of examinations, the doctors of the city hospital diagnosed Xiaobin's parents as acute schistosomiasis with ectopic brain infection.

Because schistosomes proliferate in the brain to form granulomas and compress brain tissue, Xiaobin's parents were first apathetic, hearing loss, and coma.

The doctor began to treat with praziquantel, and after a course of treatment, the father's symptoms were significantly reduced, and he was transferred from the intensive care unit to the general ward, but the mother's condition became more and more serious, and she coughed up blood.

Xiaoxian would call her brother Xiaobin every day to ask about her parents' situation, and when she heard that her mother's situation was getting worse and worse, Xiaoxian couldn't stay in Beijing anymore and had to leave and go home.

Although Xiaoxian was discharged from the hospital, her body has not fully recovered, and the doctor instructed her to recuperate for nearly a month.

Ye Zhenzhen arranged the work of the laboratory and prepared to send Xiaoxian back to her hometown in the southwest border, and Qianqian also came to join in the fun, so she had to follow.

Nan Zhiqiao is not worried about the three girls and the situation in Zhang Xiaobin's hometown, which also makes people very worried, he has been paying attention to Xiaoxian's imported schistosomiasis case in the past few days, and there has been no local reaction so far, and Nan Zhiqiao also wants to go and see it in person.

In the end, four air tickets were booked, Nan Zhiqiao, Ye Zhenzhen, Qianqian and Xiaoxian, and the four of them flew back to Dali together.

After getting off the plane, the four went directly to the city hospital.

Zhang Xiaobin was surprised and moved when he saw the four people who suddenly appeared in front of him, and first took his sister to the general ward to see his father, and then took Teacher Nan and Teacher Xiaoye to talk to the attending doctor about his mother's condition.

Xiaobin's mother became more and more seriously ill because of a previous history of tuberculosis and ectopic damage to the brain and lungs of acute schistosomiasis.

The local municipal hospital invited provincial experts to come for consultation, change the treatment plan, and first treat the symptoms first, and then carry out anti-infective treatment.

After changing the treatment plan, Xiaobin's mother improved significantly and soon left the intensive care unit and was transferred to the general ward.

On the night that Xiaobin's mother was transferred to the general ward, the city hospital accepted two more transferred patients.

The patient's symptoms were very similar to those of Xiaobin's parents when he was first admitted to the hospital, vomiting and diarrhea, and he was apathetic.

With the previous experience, the doctor quickly diagnosed the cause of the new patient who was transferred to the hospital, acute schistosomiasis infection, and then asked about the medical history, all of whom were residents of a village near Zhang Xiaobin's hometown, and had recently gone to the canal to do laundry or fishing.

These cases of acute schistosomiasis were reported to the local disease control department through the epidemic network, and the disease control personnel went to the villages with cases to investigate in accordance with the procedures of blood prevention work.

There were four villages involved, and the disease control personnel inspected the people and livestock in the villages, and the results were shocking.

The infection rate is over 50 percent for people and even higher for livestock, reaching 70 percent.

This large-scale outbreak of schistosomiasis is a very rare occurrence in the past two decades, and the epidemic alarmed the higher health department, and an investigation team of several experts was sent to the epidemic area to investigate.

Although Nan Zhiqiao is not in the investigative expert group, as an infectious disease expert at the CDC in China, he is still very concerned about this schistosomiasis outbreak, especially since this outbreak is also related to his own students.

After Zhang Xiaobin's parents' condition stabilized, Nan Zhiqiao planned to go to the village where Xiaobin lived.

The national schistosomiasis epidemic area is divided into three types: lakes and marshes, water networks and hills, with the hill type endemic area in N province and the schistosomiasis endemic area in N province divided into dam area and mountainous area.

The dam area is surrounded by mountains and dams, the terrain is low and flat, the relative height difference is less than 100 meters, the ditches are criss-crossed, the water source is abundant, the population is relatively dense, the living conditions are relatively good, it is the main production area of rice and other crops, and the area of the middle host snail of schistosoma is large.

The mountainous area is the epidemic area where most or all the residents and cultivated areas are on the slopes, the relative elevation difference is more than 100 meters, the mountains are high and steep, the land is vast and sparsely populated, the environment is complex, there are fewer ditches, the water system is independent, mainly relying on rainfall to irrigate the slopes and slopes, the types and numbers of livestock are more, the transportation is inconvenient, and the living standard is relatively low.

Xiaobin's hometown belongs to the mountainous area.

On the road from Dali to Xiaobin's hometown Nanzhao Town, the river valleys, basins and mountains are distributed alternately, the middle is a basin, the east and west sides are half a mountain and half a dam, and the Red River meanders through.

Nan Zhiqiao found an off-road vehicle out of nowhere, and drove Zhen Zhen, Qianqian, and Xiaobin back to the village, and Xiaoxian stayed in the city hospital to take care of her parents.

The village of Xiaobin's hometown is built on a hillside along the mountain, and the mountain behind it is tall, from the foot of the mountain to the top of the mountain, the vertical difference of climate is obvious, and the three-dimensional climate is significant.

It belongs to the plateau monsoon climate, dry in winter and wet in summer, rain and heat in the same season, dry and wet distinct, rainy in summer and autumn, dry and dry in winter and spring, and now this season is just the rainy and wet season.

When I set off from Dali in the morning, it was still raining lightly in the sky, and halfway through, the rain stopped, and the sun cleared the clouds and revealed it.

More than two hours away, before arriving at Xiaobin's hometown village, the road saw that crops such as corn and flue-cured tobacco were planted on the slightly flat slope, walnuts, pears and other fruit trees were planted on the steep slope, and wild ancient trees were planted on the steeper mountain, such as alpine oak, ancient pine, ancient cypress, nanmu, red toon, and the red camellia was blooming brightly.

Xiaobin's home is in the middle of the village, and the road in the village is a little narrow, and off-road vehicles can't drive in, so they can only park in the open space in front of the village.

Getting off the off-road vehicle, Nan Zhiqiao and four people, under the leadership of Xiaobin, walked to Xiaobin's house on foot.

Ye Zhenzhen had always thought that Xiaobin's hometown village was a very backward place, but when she came here, she found that it was much better than she imagined, and it was also a cement road and brick houses.

Waiting for Xiaobin to introduce everyone into the house, the furnishings in the house are also complete with household appliances, and very spacious, there is a large yard, there are fishing nets hanging horizontally in the middle of the yard, the breeze blows, the fishing nets are gently shaking, and there are a lot of aquatic plants on the fishing nets, as if the owner left in a hurry, and he has not had time to tidy up.

Nan Zhiqiao stood in front of the fishing net, his brow furrowed slightly.