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At certain times of the year, some species of fish and shellfish contain toxins, even if well-cooked. The most common type of fish poisoning in travelers is ciguatera fish poisoning.

BSE is a cattle disease, and vCJD is the equivalent disease in humans. Both are fatal brain diseases. Researchers believe that people become infected by eating beef contaminated with BSE.

Diarrhea is the term for bowel movements that are loose or watery. Traveler's diarrhea occurs within 10 days of travel to a location or an area with poor public hygiene. It's the most common illness in travelers.

Typhoid fever is a serious infection caused by bacteria. You can get the disease by eating food or drinking water that is contaminated with the bacteria.

Viral hemorrhagic fevers (VHFs) are illnesses caused by several types of viruses. Some of these viruses cause mild illness. Many others lead to life-threatening diseases with no known cures. One of the best known of this group is the Ebola virus.

Yellow fever is a viral disease caused by the bite of a mosquito. It is found mainly in certain areas of Africa, Central America, and South America.

Taking one or a mix of painkiller medicines daily over a long time may cause chronic kidney problems. This is called analgesic nephropathy. Painkillers that combine two or more medicines (such as aspirin and acetaminophen together) with caffeine or codeine are the most likely to harm the kidneys.

After a diagnosis of bladder cancer, you'll likely need more tests. Read on for details about these tests and what to expect.

When the wall between the bladder and the vagina gets weak, the bladder may drop or sag into the vagina. This disorder is called cystocele.