Dr. Mohammad Ahmed M.D., M.P.H

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• What Complications May Occur If Bronchitis Goes Untreated?

  Acute bronchitis may not cause any complications if it occurs the first time in a person. It usually goes away by taking proper rest after about two to three weeks. However, if bronchitis is left untreated, it can affect the respiratory system and damage the airways and lungs. Because of this...

• Lactose Intolerance: Get the Facts

  Lactose intolerance is a digestive problem where the body cannot digest the lactose present in milk and dairy products. Lactose is naturally occurring sugar found in dairy products. It is the main carbohydrate found in all types of milk.In a very small number of cases the production of lactase may...

• What Is Nicotine?

  IntroductionNicotine is an alkaloid stimulant that comes from the nightshade family of plants, particularly from the leaves of tobacco. The type of nicotine found in tobacco plants is called Nicotiana tabacum. Nicotine can also be synthetically produced. Thousands of chemicals are contained in...

• Cholera and Diarrhea

  How Is Cholera Related to Diarrhea? Cholera is an infection that occurs in the small intestines. It is caused by a bacterium known as Vibrio cholerae. The disease is acquired through the intake of contaminated food or water. When an infected person defecates and then clean water comes into contact...

• Why Do Some Vaccines Have to Be Injected Twice?

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• What Is Cyanosis and Why Does It Occur?

  IntroductionCyanosis is the medical term for a bluish discoloration of the skin, nails, toes, and mucous membranes. It is generally caused by low levels of oxygen in the blood. Normally, blood appears bright red when it is fully oxygenated. However, when blood does not have enough oxygen, it turns...