After the Spring Festival, the temperature in Yunhai City has risen significantly.

In March, several parks on the outskirts of Yunhai City are full of people on spring outings.

The grass is green, the branches are sprouting, and the beach is windy, which is just right for kite flying, and many people are chasing kites in the open space of the park.

On the green grass, piles of small bulging dirt bags are very conspicuous.

From time to time, a few small ants crawled on and around the dirt bag.

A little boy of three or four years old was running on the grass with a kite string.

Two adults, a man and a woman, followed the little boy, and the family of three enjoyed themselves.

The little boy stared at the kite in the sky, did not pay attention to his feet, and accidentally tripped over a bulging dirt bag.

The kite flew away, and the little boy lay face on the ground.

"Wow......" the little boy cried.

Mom and Dad picked up the little boy and found that the child's face was covered with mud and a few blades of grass.

The child cried heartbreakingly, and the parents hurriedly took out a tissue to wipe the child's face.

There were a few small blisters on the originally white skin.

There is also a red and swollen circle around the blister.

Why did you still fall into a blister on your face?

If you look closely, it doesn't look like it was caused by a wrestling, but more like it was bitten by some bug.

"What kind of bug bites? so many blisters. We should have brought wind oil essence with us when we came out today, right?" asked the child's mother.

"Brought it. ”

The child's mother hurriedly took out a small bottle of wind oil essence from her backpack and poured it out to apply it to the blisters on the child's face.

"Ah...... It hurts ......."

The child cried even harder, this time scratching at his neck.

The father hurriedly lifted the collar and found a small ant around the child's neck.

The ants are small, but they are not like the black ants that were commonly used before.

The small ant on the child's collar is reddish-brown in color, and when it bites the skin, a red bag immediately appears, and after a while, a small blister appears in the center.

What kind of ant bites people so badly? The child cries incessantly.

"Ah......h

Looking down, I saw that several red ants had climbed on my ankles.

The child's mother loves to be beautiful, and she came out of the spring outing and wore a pair of cropped pants she had just bought, with her ankles and part of her calves exposed.

The bare skin outside, and a few red ants climbed up at some point.

Being stung by red ants makes it itchy and unbearable.

The child's mother lowered her head and slapped the red ants off her body, and the child's father looked around, but his face turned pale with fright.

I saw that where the child fell just now, a mound of earth was crushed and deformed, and countless red ants came out from under the ground, crawling towards them quickly.

The red ants are dense and crawling in the direction of the intruders.

It's a scalp-tingling sight.

The red ants don't seem to be easy to mess with, and they're getting ready to deal with a family of three that crushes their nest.

"Quick, get out of here. ”

The child's father picked up the child, pulled his wife, and ran away from the red ant's nest.

Red ants are in hot pursuit, and when they encounter people playing on the lawn, they attack as well.

The person who was bitten by the sting cried out in pain.

The crowd flying kites on the lawn panicked.

The family of three who ran away first trembled when they looked at the frightened scene in front of them.

The child in Dad's arms was still crying, but he was frightened by the sight and suddenly lost his voice.

The father looked down at the child, and he was swollen all over, and the blisters on his face were connected by the bites, and the child's originally thin little face was now swollen like a pig's head.

His breathing became more and more rapid, and finally he only had intake but no out, and his whole body was bruised.

He began to choke.

"Doctor...... Hospital...... Quick, get to the hospital!"

The child's father ran away and took the child to a nearby hospital.

——

The First People's Hospital of Yunhai City, Emergency Department.

Saturday morning, which had been a bit busy, was even busier this time, when a dozen or so citizens who had been injured by insect bites suddenly poured in, and one of the little boys was the most seriously ill, already suffering from asphyxiation shock.

Emergency doctors are experienced in treating insect bites, but this is the first time I've seen them on such a large scale.

"Do you know what bug you were bitten?" the emergency doctor asked the child's father.

"Ants, a small kind of ant. The child's father said, gesturing with his hand to the size of the ant, "The ant is very small, smaller than the usual size of ants." ”

Can ants bite people out of this symptom?

And to attack so many people at the same time?

Emergency physicians haven't seen or even heard of it before.

"Where was the bitten?" the emergency doctor asked.

"The Oasis Park in the western suburbs, not far from here, is the park that has just been built. ”

"I was also bitten while playing there. "There are patients who chimed in.

"Me too. ”

"Me too, that ant bite hurts. ”

"The lawn in Oasis Park is full of ant nests, and it seems that someone has trampled on the ant nests, and many ants have come out to attack people. ”

"I also saw it, it was red ants, very small, but there were a lot of them, crawling on the ground, densely packed, like a scene from that horror movie. ”

"At that time, I was catching small fish in the small pond next to the lawn with my son, and when I saw ants crawling over, I caught a few with a bottle, but I didn't expect to be stung by one of them, which was really painful!

The doctor looked at the red ants in the glass jar, small, trapped in the bottle crawling around, feeling very irritable.

"Red fire ants?!" the emergency doctor exclaimed.

But I hadn't heard of red fire ants in Yunhai City before.

Since people are bitten by this kind of ant in the park, then it is native, is there a biological invasion?

Red fire ant bites are not difficult to treat, but if they are really biological invasions, they can be difficult to do.

According to the treatment plan for the bite of red fire ants, the emergency doctor treated the patient symptomatically and called the city center for disease control and prevention.

——

Yunhai Center for Disease Control and Prevention, Emergency Office.

Because it was a weekend, there was no public health emergency, and the members of the emergency team were off on the weekend, and Li Bai came in advance because he had to apply for an exam for the center.

Today is the day when the Center for Disease Control and Prevention organizes the skills test for those who pass the written test, and Lin Xiaoxiao is one of the many test personnel.

Li Bai is one of the invigilators.

The skills test is held in the Experimental Complex.

The exam is divided into two parts, physical and chemical operations and microbiological laboratory operations.

The two parts are in different laboratories, and Li Bai is the invigilator of the microbiome.

This time, the experimental skills test of microorganisms is the basic experimental skill - flat dish marking.

Lin Xiaoxiao has interned in the laboratory department and is already very proficient in doing this.

Li Bai watched her finish the operation, and did not express any opinion verbally, but his eyes were approving.

Lin Xiaoxiao came out of the microbiology laboratory, followed the instructions on the ground, entered the physical and chemical laboratory upstairs, and continued the exam, while Li Bai watched the operation of the two examiners here, and his mobile phone rang.

The caller ID is a familiar number - the office phone number of the emergency department of the First People's Hospital.