I don't have a system but I have a hammer

The corner of the eye of the exploding head twitched when he heard the words...

"Are you kidding? All the patients have undergone intestinal examination, and there are no worm eggs in the body. The only deceased died of a heart attack due to dehydration, not to mention that the autopsy report also stated that Clearly, there is no sign of any infection in the body..."

I didn't refute, just took the documents on the ground and stretched out my hand to him...

"Pen!"

There was hesitation in the eyes of the explosive head, and he took out a pen and handed it over carefully, while muttering...

"Let's say it first, don't make trouble, if the situation just happened again, I won't come here..."

I didn't even care about his interest, I took the pen and started to write and draw on the paper...

Tch, I wish you didn't come over...

After 1 minute, I handed the drawn sketch to Afro, and ignored his ridicule of "Is the drawing not bad? I heard that the killer's sketch ability is good, it seems to be true", and his With a flash of seriousness in his eyes, he began to introduce the origin of the parasite...

"Sniffing beetle, the larvae are only the size of a grain of rice and need a host to reproduce. They usually lurk in the nasal cavity or respiratory tract of creatures, so they can avoid internal inspection..."

"Once they need to eat, they will secrete a toxin that is not easy to remain, forcing the host to expel a large amount of water in the body, which is what you call diarrhea..."

"At this time, the host will become weak and listless due to acute dehydration, and the larvae will take the opportunity to sneak into the brain and start to obtain the nutrients they need..."

The explosive head frowned, as if he didn't believe it...

"Is what you said contradictory? After dehydration, people will lose a lot of nutrients. How can larvae get nutrients?"

I can't help but ask...

"Does dehydration necessarily lose all nutrients?"

The explosive head froze for a moment, then raised his hand to signal me to continue...

I pouted...

"Actually, you are right. Dehydration will lead to a large loss of nutrients in the human body, but what the sniffing beetle larvae need is not those things, but the anti-substance secreted by the stress response of a person after acute dehydration..."

"To put it simply, things like adrenaline, endorphins, prolactin, and angiotensin, their existence can help us resist pain and stress, and keep the body moving..."

"This is the real food for the larvae, and the most powerful part is not here, but after eating and drinking, they will crawl back into the nasal cavity and become a small immobile and almost invisible meat... "

The explosive head nodded half-understood, took a puff of the e-cigarette, and asked another question...

"Then it's not impossible to check it out..."

I refill a cigarette and slowly exhale...

"Imagine that after acute dehydration, most patients will choose to lie in bed and rest because of their extremely low mental state after acute dehydration. They will go to the hospital for a check-up when their spirits are almost recovered, right?"

The afro immediately came to a sudden realization, and at the same time as his eyes lit up, he subconsciously picked up my words...

"I understand what you mean. At that time, even if the doctor conducted a general examination, they would only treat the eggs as small nodules or food scraps. In addition, due to preconceived ideas, most doctors would only check the patient's stomach, and the larvae It has been hiding in the nasal cavity and respiratory tract, so it can be hidden for so long without being discovered..."

I gave him an appreciative look...

"Your reaction is quite fast, which is almost what it means, but it's just a larva..."

As soon as the topic changed, my eyes became serious...

"Sniffing beetles have to go through three stages of metamorphosis before they can grow into adults. They will not cause permanent harm to the human body in the larval stage. After all, dehydration is not an incurable disease, but a complication or a cause of other diseases. The odds are increasing..."

"Of course, the human body's response mechanism will not be active forever, so when the host no longer secretes or it is difficult to secrete those anti-substances, the larvae will take the initiative to leave and carry out the second stage of metamorphosis..."

Speaking of this, the afro said "wait", while replying to the message in the communicator, while asking...

"You mean, as long as the larvae leave, they will enter the second stage, but the larvae must need enough nutrients to metamorphose. If they leave because the human body is drained, then in case this person is a sick seedling, there is no way to secrete it." What about the food they need?"

"Of course, we now know that all patients are manual laborers, and their physical fitness must be better than other people, so what I just meant is that they are just a group of bugs, and they are not high-intelligence animals. How did they Accurately find the most suitable host?"

I narrowed my eyes slightly and gave an explanation...

"It's actually very simple to find a suitable host. Manual laborers or sports enthusiasts are usually the most likely to secrete body sweat, while adult sniffing beetles have no vision and hearing, and can only catch prey with a keen sense of smell, so I reasonably doubt , the larvae should rely on this ability to find a host..."

Unraveling his doubts, the explosive head glanced at the sketch in his hand, as well as the ferocious sniffing beetle on the drawing, and a flash of fear suddenly flashed in his eyes...

"Just a larva can avoid inspection and find a host, so wouldn't the adult beetle..."

I nodded very seriously...

"That's right, adults will be even more terrifying, but fortunately, in the process of changing from larvae to adults, they will go through a self-hatching state for about a month. You can understand it as a chrysalis pupa. In this state, their bodies are extremely fragile. A child can crush it to death, so hurry up..."

The afro's eyes were fixed, and he hurriedly asked...

"Are there any pictures…"

Hearing his request, I raised my eyebrows slightly, first glanced at the prison cell, then patted on the padded jacket without pockets, and finally curled my lips in disgust...

"What do you say?"

The exploding head was stunned for a moment, and then realized that what he asked was obviously superfluous, and he couldn't help but smile awkwardly...

"Sorry, I mean, can you draw the appearance of the chrysalis..."