The patient didn't speak, as if he was thinking.

Gu Yanan changed the way he asked, "When did you start feeling unwell?" ”

"Three days ago on the night, when the five of us came down from Qingcheng Mountain, returned to the staff dormitory, and prepared to rest after dinner, but before we finished dinner, we felt itchy all over my body, my eyes hurt and I couldn't open them, and some of us were coughing.

We all suspected that it was because of the miasma inhaled in that valley in Qingcheng Mountain during the day that we would get sick, so we went to Qingcheng County People's Hospital.

In the hospital, the doctor prescribed us some medicine, we took it back in the evening, and the next morning not only did not get better, but it was more serious, so we went to the county hospital and were hospitalized for two days and were sent here again. ”

The patient recounted his experience in fits and starts, retching twice in the process, looking very painful.

Gu Yanan quickly analyzed the key point in the patient's words just now—the miasma in the valley in the Qingcheng Mountains.

Gu Yanan asked, "How can you be sure that you are exposed to the miasma in the valley?" ”

"When we first entered the primeval forest of Qingcheng Mountain, the fog in the forest was white and moist, and it felt very comfortable to breathe into the nose, but when we arrived in that valley, the fog changed, the color was a little yellow, and the smell was very strange when we breathed into the nose, and the nose and eyes hurt, so we felt that the fog in the valley was not ordinary fog, but miasma."

Gu Yanan continued to ask, "The taste is strange?" What kind of flavor does it taste like? Can you describe it? ”

"It smells of stinky garlic, and it smells a little like mustard."

Gu Yanan chuckled in his heart.

Miasma in forests is generally caused by the decay of plant or animal corpses, which leads to the accumulation of harmful gases to form miasma that is harmful to the human body, but this miasma generally does not have color.

The most suspicious is the smell in the mist, some natural trees also have a stinky garlic smell, such as garlic fruit wood, commonly known as golden wood, its body will exude a garlic smell, and the soapberry family, Luan tree, the leaves of the Luan tree also have a garlic smell.

Wild mustard greens will give off a mustard smell.

Gu Yanan asked again, "Are there any golden trees in the valley where you found the miasma?" Or is it a luan tree of the Sapindaceae family? Or is it wild mustard greens? ”

The patient shook his head slightly in a heavy wheezing voice, "No, there is no golden wood, and I don't see luan trees and wild mustard greens, most of the trees in that valley are black locust trees, most of the wild grasses are wormwood, and there are some wild flowers of the cruciferous family. ”

If the smell does not come from these trees and flowers in nature, it may be a synthetic preparation.

Garlic-flavored and mustard-flavored poisons - mustard gas?!

After rational analysis, Gu Yanan felt that this kind of thinking just now was impossible.

Qingcheng Mountain is a primitive mountain that has not yet been developed, how can mustard gas run into the deep mountains and old forests?

Gu Yanan frowned slightly, whenever she had this expression, it meant that she was thinking.

The patient on the hospital bed, in order to enable the doctor to find the cause of the disease as soon as possible, also actively cooperated, and said what he thought, "There is also a waterfall and a waterhole in that valley, the water in the waterhole flows outside along the small stream in the valley, the water is very clear, there are no fish in sight, the slopes around the valley are full of big trees, the woods are quiet, there is this yellow mist everywhere, it felt very strange at the time, now I think that there must be something wrong with that place, you can go there and see." ”

Gu Yanan asked, "Do you remember the exact location of that valley?" ”

"Remember, we were there surveying the terrain, and I had the exact coordinates of that place."

The young patient glanced at the bedside table and motioned for Gu Yanan to open it.

Gu Yanan took out a notebook from the bedside table next to the hospital bed and handed it to the young man on the hospital bed.

The young patient turned to one of the pages, tore off a piece of paper and handed it to Gu Yanan, "This is a simple map, and there are specific coordinates, you can find the location by looking for this map." ”

Gu Yanan took the torn paper, put it away carefully, and instructed Lu Li to sample the patient's blood and urine, and after everything was sorted out, he walked out of the ward.

Outside the ward, Gu Jiashu's face was a little anxious.

Gu Jiashu is the attending doctor, but he is also Gu Yanan's elder brother, and in addition to caring about the cause, he is more concerned about the safety of his sister.

Gu Jiashu grabbed Gu Yanan and asked, "Do you really want to go to that miasma valley?" ”

"Well, in order to find the source of the disease, to find the cause, I have to go, it's my job."

Gu Jiashu knew his sister's temper, and he couldn't persuade her at all, and this was indeed Gu Yanan's job.

Xiao Zhang, a doctor in the infectious disease department, quipped, "The scope of your disease control work is really extensive, in addition to infectious diseases, now you have to manage even the miasma in the mountains." ”

Gu Yanan smiled, "Disease control is originally wide, we are in charge of the sky, we are in charge of the earth, and we are in charge of the air in the middle. ”

A total of five people were transferred from Qingcheng County People's Hospital, and it was the five-person team that went to Qingcheng Mountain to conduct surveys at that time.

In another ward, Lao Li, the leader of the survey team, was in the ward, and the nurse was changing his dressing.

Gu Yanan, Lu Li, and several doctors from the infectious disease department entered the ward and watched the nurses change the patient's dressing.

Captain Li's mental state is okay, a little better than the young patient just now, but there are also many blistering and broken places on his body, and the broken places are beginning to suppurate.

The nurse was scraping off the purulent skin on Lao Li's arm.

Lao Li, who was as strong as an ox, couldn't bear the pain, and hit his head against the wall next to him in pain.

When Lu Li saw this situation, he felt that his arm seemed to be scraped and hurt.

The nurse finally finished changing the medicine, and Lao Li was already sweating profusely in pain and lying on the bed weakly.

Gu Yanan took the opportunity to ask Captain Li a few questions, all the questions were the same as the questions asked to the young patient just now, and Gu Yanan got similar answers.

After the five patients inquired, the samples had been collected, and Gu Yanan also had a general idea in his heart, and he had a direction for the next flow investigation.

Coming out of the last ward, Gu Jiashu asked Gu Yanan, "What do you think is the cause?" ”

Gu Yanan's face was heavy, "It is speculated that it may be mustard gas poisoning, but it can only be determined after returning to the CDC laboratory to test the specimen." ”

"Mustard gas?! The symptoms are consistent, but how did they come into contact with mustard gas? ”

Gu Yanan shook his head, "I'm just speculating now, and when it's confirmed, we'll look for the source." ”

Several doctors in the infectious disease department also did not look very good, "If it is mustard gas poisoning, there is no specific medicine, and we can only treat the symptoms, and our hospital does not have previous cases of mustard gas poisoning for reference, everything depends on exploration." ”

Gu Yanan, "What I'm worried about now is that the source of mustard gas is unknown, and more people may be harmed. ”