ask sword 2

Chapter 242 Blood Sucking

Others were puzzled, but Qiu Feng realized it instantly, "Wait a minute, I'll get it."

Qiu Feng's father, Qiu Jing, is the chief physician of the Imperial Medical Office, and this is half of her family.She ran into the room and took out a bundle of reading silk in a short while.

The Niansi used in reading class has many materials, not only all kinds of metals, but also special spider silk and worm silk.More advanced ones should be redeemed with credits.

The bundle that Qiu Feng took out is a special kind of spider silk, not sticky, but extraordinarily tough and soft - Li Ang communicated with her later about using the silk to detect the human body, and concluded that the effect of the spider silk is the best .

"Give."

Qiu Feng handed out the Niansi, Li Ang took it, washed it with saline, and injected Nianli into it.

sand--

The spider silk trembled, and under everyone's gaze, it slowly pierced into Yi San's swollen abdomen.

Li Ang closed his eyes, releasing his thoughts with extreme caution.

After he reached the high level of the hiding place, the effect of mind scanning was much better than before.Although he couldn't see the place a little further away from the spider's silk, it was more than enough to check Yisan's abdomen.

Parasites, too many.
Under the abdomen with distended veins, countless tiny worms were wriggling and rolling.

Every few inches the spider silk advances, densely packed worms and eggs can be seen.

sand--

Li Ang slowly withdrew the spider thread, turned to look at Qiu Jing, "Doctor Qiu, there should be a microscope in the Imperial Medical Office?"

"Yes. Just bought one last month. Come with me."

Qiu Jing nodded and led the way to a room.

Li Ang stepped into the room, and under the gaze of everyone, he skillfully used two thin pieces of glass as slides, put something at the end of the spider silk into the slides, adjusted the parameters of the microscope eyepiece and objective lens, and observed the slides. .

Yu Guo's current microscope is quite excellent, and it can clearly see very small objects that are almost invisible to the naked eye.

But this time, in the shot, two bugs appeared.

They are long and short,
The short one is milky white, the worm body extends to both sides, and curls slightly to the ventral surface, tightly hugging another worm.

The elder, thin in the front and thick in the back, looks like a nematode, dark brown, with a body length of nearly 25 mm.

The two bugs hugged each other, entangled and difficult to separate.

The mouthparts can be vaguely seen at the top.

There are two forked tails below.

Under the microscope, the two worms were still weakly wriggling.In the thin body, you can see the dark brown lines of the body fluid flowing - that is the digested human hemoglobin.

"Schistosomiasis"

Li Ang's heart was like being tied to a stone, and it sank toward the abyss.
The drastic change of mood even broke through his usual self-cultivation, causing an ugly expression to appear on his face.

A poem echoed in his mind.

Green water and green mountains are in vain, Hua Tuo is helpless!A thousand villages of Xueli people leave arrows, ten thousand households of Xiao Shu ghosts sing.

Thousands of households and Xiao Shu ghosts sang.
He seemed to be able to see countless small insects wriggling and multiplying in the water, spreading death to thousands of households.

One by one, the villages disappeared on the map,
The abdomens of countless sick people were swollen like balloons, and they died in pain as they became thinner and thinner day by day.

".Sunrise?"

Qiu Jing's voice pulled Li Ang back from his trance, "Schistosome, is it the water Gu worm?"

"Yeah. This is what I took out from Yi San's stomach with Niansi.

I saw it sucking blood in the human body, so I called it this name. "

Li Ang nodded and gave up the position of the microscope so that others could also observe the worms.

Schistosomes are dioecious and entangled with each other.

The males are stubby and the females are slender, with an average of 20 mm. The small nodules and spine-like protrusions on the body surface can be clearly seen under the microscope.

All the doctors looked at the wriggling worms under the microscope in turn, and their faces turned pale.

The thought of a patient's swollen belly full of similar blood-sucking worms is chilling.

"A few years ago, some patients who liked to eat raw fish and snake soup also had abdominal swelling, as if flooded. After death, it was found that their intestines and stomach were full of parasites. The heart, liver, spleen and lungs were corroded and riddled with holes. It's like tofu."

"What about this disease? Many people say that they are afraid to drink raw water and eat raw food, so how can they get sick together?"

"Could it be because they touched the water? They are all crew members, so it is inevitable that they will go into the water."

"Should I use croton first? Since it is an abdominal worm, maybe I can use croton to expel the worm first."

The doctors discussed in low voices, while Li Ang silently walked out of the room and went to the lobby of the next room.

In the lobby, the lights were dim, and temporary beds were placed on the floor, each with a patient lying on it.

coughing, hard breathing, moaning,
The smell of herbs, the smell of blood in phlegm, the smell of vomit,
Li Ang looked at the hundreds of beds neatly arranged, feeling extremely depressed.The palm of the hand pinched the door frame, and squeezed the wooden door forcibly, leaving fingerprints.

Tapping.

Footsteps sounded from behind, Qiu Feng approached, looked worriedly at the gloomy Li Ang, and said softly, "Risheng, are you okay?"

"I'm fine, just a little bit."

Li Ang let go of the door frame, he didn't know what to say for a moment, he could only hold back the word "despair",
There is probably no one in the world who understands schistosomiasis better than him,

No one knows better than him how terrifying schistosomiasis is.

This parasite belongs to the Phylum Platyhelminthes, Class Trematodes, Subclass Diploides, Order Diploides, Schistosoma, and the genus Schistosoma.

In the course of life history, there are seven developmental stages: adult, egg, miracidia, mother sporozoite, sporozoite, cercariae and juvenile larvae.

Start from the egg stage, under the appropriate air temperature and water temperature,

The eggs will hatch into miracidia, and the miracidia will quickly find the intermediate host snail in the water, invade its body, and carry out asexual reproduction. Within a few months, the miracidia will gradually develop into mother snails, sporozoites, and cercariae.

The cercariae swim actively in the water. Once they find a new host, they will use the opening in the front part of the worm body to secrete tissue enzymes and penetrate into the skin of the host.

Afterwards, the cercariae will shed their tails and enter the blood stream. Along with the blood or lymph, they will be transported to the whole body. After the male and female embrace, they will migrate to the portal vein—the mesenteric vein to live and mature.
24 days after invading the host, mating and spawning begins.

A female worm lays about 1000 eggs a day, half of which will enter the bladder and be excreted with urine, and the remaining eggs will settle in the liver, rectum, colon, appendix, lungs, brain and other organs.

Mature eggs contain mature miracidia, whose title secretions are antigenic, causing egg granuloma and subsequent fibrosis, leading to liver cirrhosis and portal hypertension,
Clinically, it manifests as ascites, splenomegaly, esophageal varices, etc.

Five weeks after infection, hatchable eggs will appear in the feces of the host, and the eggs will float away with the water flow to start the next round of reproduction, parasitism, and transmission.

crackling—

In the night sky, the fireworks on New Year's Eve bloom brightly,
Li Ang stood at the entrance of the lobby, with his back to the bright sky, staring at the hospital beds.

Can it be controlled?
The cercariae of schistosomiasis spread with the water flow, and any behavior of fishing, swimming, washing clothes, or washing feet in the water may be recruited.

Even if you just step on the plague water, you may be parasitized.

The area of ​​farmland and rivers in Yu State is too large, and the shipping is extremely developed.

The snails, the intermediate hosts of schistosomiasis, can easily attach to shipping ships, and as the ships spread to distant places, the scope of infestation will expand.

Just like dropping a drop of ink on paper, it will spread around by itself along with the paper texture.

So, is it cured?
The best drug for the treatment of schistosomiasis is pyrazine isoquinoline derivatives, praziquantel.

At the present stage, the complexity and difficulty of its production process is a hundred times or a thousand times that of allicin and penicillin.

Almost impossible to produce.

And considering that these patients in the lobby are the true transmission status of schistosomiasis in the late stage of parasites, it is worse than expected.

How many infected people are parasitized by schistosomiasis?
20?
30?
still a million
In the night sky, the fireworks faded away.

Li Ang's face was once again hidden in the darkness.

(End of this chapter)