LabTalk with Isaac
Biomedical Scientist | Lab Educator đź§Ş
I simplify laboratory science, blood results, and medical concepts to make learning easy for students and professionals.
Follow to master the lab with Isaac Nkhoma.
02/10/2026
SHAWARMA IS KILLING YOU SLOWLY HERE IS WHY
I know many of us love shawarma. It smells nice, it tastes good, and it is easy to find almost everywhere. But as someone who studies the body, I have to tell you the truth: if you eat it too often, it can slowly harm your health.
Start with the salt. The meat is usually marinated with a lot of salt, and the sauces and bread add even more. Too much salt makes your blood pressure go up, and high blood pressure often gives no signs until it has already done damage to your heart or kidneys.
Then there is the fat. The meat is fatty, and the creamy sauces are heavy too. When you eat this kind of food again and again, the fat can build up in your blood vessels and make your heart work harder. Add chips and a cold soda, and one meal can have more calories than your body needs. Over time, this leads to weight gain and can open the door to high blood sugar and diabetes.
There is also the question of how the meat is kept. In many places the meat turns on the spit for hours, sometimes in the sun, and sometimes it is not stored well overnight. Germs grow easily in such meat. That is why some people end up with stomach pain, vomiting, or a running stomach after eating from a place that is not clean.
I am not telling you to stop eating shawarma completely. I am only asking you not to make it a daily or weekly habit. Enjoy it once in a while, buy from a clean place, go slow on the sauces, and add some vegetables to your plate.
Your body will thank you for it. And while you are at it, please go and check your blood pressure and blood sugar this week. These two can hurt you quietly, and the earlier you know your numbers, the better.
High blood pressure and high blood sugar are silent killers. You can look and feel healthy while they damage your body. Tomorrow, visit the nearest clinic or hospital and get both checked. It takes only a few minutes, and you’ll thank me later.
02/10/2026
During a cholera outbreak, a 6-year-old boy is brought from a village clinic. He has had rice-water stools and vomiting since yesterday. He is lethargic, with sunken eyes, cold hands and a weak fast pulse, and a skin pinch goes back very slowly. The malaria RDT is positive. The nurse starts IV Ringer’s lactate and gives ORS. Two hours later he has improved, but then he suddenly has a seizure.
What is the most likely cause of the seizure, and what is the first step?
How do you quickly screen for cholera in an outbreak?
A patient with a long-term urinary catheter develops fever and cloudy urine. What do you do?
A woman gets burning urine after every sexual in*******se. What’s the advice?
Which sample and test confirm cholera in the lab?
A patient was treated for malaria 10 days ago and feels well. The RDT is still positive. Why?
A young patient has vomiting, deep rapid breathing, fruity-smelling breath and a glucose of 25 mmol/L. What’s the first step?
What are the three phases of the laboratory testing process, and where do most errors occur?
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