Elf science, I created a new generation

The vampire earl bit his finger, and a drop of blood fell into Ye Feng's left eye.

Suddenly, Ye Feng felt his left eye was burning hot, as if it was on fire, but relying on his strong willpower, he didn't make a sound.

"Boy Dongfang, my memory is in that drop of blood. When you see that girl, your left eye will become hot. If you find her and bring her to me, I will reward you."

"it is good."

Anyway, getting an S-rank bloodline is also a good thing, you can give it to others if you don't need it.

Therefore, Ye Feng was going to contact the mayor to bury the vampire count with honor.

Soon, with the help of the mayor, the vampire count was buried and temporarily hibernated in the cemetery, waiting for Ye Feng to retrieve the girl from decades ago.

"Oriental people, I wonder if you have developed a medicine to treat the Black Death?"

The mayor pinned his hopes on Ye Feng.

Ye Feng has a system that can be exchanged for some medicines, including streptomycin for the treatment of the Black Death.

But directly by the mayor streptomycin, the number of people who can be saved is limited, and Ye Feng does not have that much wealth.

He exchanged a box of streptomycin, which contained instructions, including the method of preparing streptomycin.

"Mayor, I have researched the medicine, but I need a living patient to try the medicine."

Ye Feng has not forgotten his original intention of coming to this dungeon, that is to be infected with the black death virus.

"This... is a bit difficult. Once a Black Death patient is found, he will die soon. So it is really difficult to find a living patient."

"Mayor, I know of a place where there may be living Black Death patients."

The young man who had been with the mayor told him that he knew a place where there might be living Black Death patients.

"Where? Why don't I know?"

The mayor was a little curious. As the mayor, he didn't know there was such a place in the town.

"Leprosy Island, there is an old woman there. She is very skilled in medicine and has a kind heart. I saw her come to the town to buy medicine a few days ago. She may be treating people infected with the Black Death."

"Oh, it's possible."

The mayor remembered that place.

Leprosy Island, as the name suggests, on this island, many people suffering from leprosy live on the island.

In order to test the efficacy of the medicine, the mayor decided to take Ye Feng to Leprosy Island.

Soon, the three of them landed on Leprosy Island, which was full of rubbish and looked a bit barren and messy.

The three of them went to the island and attracted the attention of the people living on the island.

An old woman and a group of people blocked the way of the three of them.

Ye Feng looked at the old woman, and suddenly his left eye became hot.

"is her."

Ye Feng realized that the old woman in front of him was the person the vampire was looking for.

The mayor explained the situation forward.

The old woman was very reasonable and led the three of them into the core area of ​​Leprosy Island.

There are really a few patients suffering from the Black Death here.

"Mayor, unfortunately a few of them got sick. I haven't cured them for a long time, but I can barely save their lives."

I have to say that the old woman's medical skills are still very good, at least she saved the patient's life.

"Oriental, you have found a patient of the Black Death, please try the medicine."

The mayor greeted Ye Feng and asked him to test the medicine.

Ye Feng did not refuse. He observed the conditions of the patients, and first took the virus samples with a cotton swab.

Then, take out the streptomycin and inject it into the patient's body.

After a short period of time, the effect of the medicine appeared, and the complexion of the patients improved a lot.

The mayor and the old woman were stunned. They did not expect the medicine brought by an oriental man to be so miraculous.

"Thank you for saving them."

The old woman sincerely thanked Ye Feng.

"You're welcome, this is what I should do."

Ye Feng was very modest, he was thinking about how to trick the old woman out of the island to meet the vampire count.

At this time, the mayor came to Ye Feng's side and said, "Hero, I hope you can promote this medicine."

The mayor has changed his tune and called Ye Feng a hero.

"Hero, can you leave the formula to the old woman, I will use it to cure diseases and save lives."

"Yes, but the formula of this medicine was given to me by my friend. If you want it, you have to ask for his opinion."

"Okay, the old lady will accompany you for a while. Mayor, take a look for me. I will meet someone with the hero first."

"it is good."

The mayor is a good man, and he promised the old woman to take care of the people on Leprosy Island.

Soon, Ye Feng took the old woman to the cemetery where the vampire count was buried.

"Master Earl, the person you asked me to find has arrived."

Hearing Ye Feng's words, the vampire rushed out of the tomb, which frightened the old woman.

"This...what's the matter?"

Seeing the vampire count coming out of the tomb, the old woman was stunned, and her thoughts went back to decades ago.

"Benefactor, long time no see, how are you?"

At this moment, the vampire count turned into the appearance when he was rescued.

"Are you...? Tanggula?"

The old woman didn't dare to think about it. After decades, the other party hadn't changed at all.

"Benefactor, if you hadn't saved me back then, I wouldn't be where I am today."

The vampire count couldn't control his emotions and took the old woman into his arms.

!!!

The old woman resisted a little, then gave up.

"I heard that you have a prescription for curing diseases and saving lives. I need it. Give it to me."

The old woman explained her purpose.

"prescription?"

Earl Tanggula was a little confused, what was going on?

"My lord, the prescription is with me."

Ye Feng took the initiative, and then told the old woman how to make streptomycin.

streptomycin method.

Step 1: Weigh raw materials (straw, potato, soybean meal, fish bone meal, glucose, wheat bran, corn starch, dipotassium hydrogen phosphate, magnesium sulfate, sodium chloride).

Step 2: Preparation of fermentation medium.

Step 3: fermenting and preparing streptomycin.

Raw materials: 7% of straw enzymatic hydrolyzate, 5% of potato extract juice, 3% of soybean meal hydrolyzate, 2% of fish bone meal hydrolyzate, 2% of glucose, 1% of wheat bran, 1% of corn starch, 0.1% of dipotassium hydrogen phosphate, 0.03% of magnesium sulfate, 0.03% of sodium chloride, and the rest is water.

Preparation of fermentation medium: Add straw enzymatic hydrolyzate, potato extract juice, soybean meal hydrolyzate, fish bone meal hydrolyzate, glucose, wheat bran, corn starch, dipotassium hydrogen phosphate, magnesium sulfate, and sodium chloride to water in sequence, adjust the pH to 7.1-7.5, sterilize, and cool.

Preparation of Streptomycin by Fermentation: Put Streptomyces griseus seed culture liquid into a fermenter equipped with fermentation medium, and ferment at 32° C. for 96 hours to obtain a fermented liquid.

The old woman kept the instructions as if she had found a treasure.

"Count, the matter is over, it's time to fulfill your promise."

Ye Feng asks Earl Tanggula for benefits.

"Okay, this treasure chest is for you, and I will open it after I leave."

Tang Gula handed Ye Feng a treasure box, which might be an artifact.