Time is nigh for the wet suits and SCUBA tanks to come out of the closet, and although the odds are in the diver's favor (decompression sickness occurs in about 2-4/10,000 dives, affecting approximately 1,000 U.S. divers per year), it's also time to think about decompression sickness (aka the bends, caisson disease).
While you are sorting through the day's mail, you slit open an envelope containing not only a letter, but a fine white powder. What should be your next move? Reseal and re-address the envelope to your favorite in-law? Not a good idea. Attempt to identify this powder by sniffing and tasting it? Nope.
African honey bees, also called Africanized bees or killer bees, are descendants of southern African bees imported in 1956 by Brazilian scientists attempting to breed a honey bee better adapted to the South American tropics.
I believe that most Southerners who enjoy our fields and forests are familiar with this strange-looking little creature and have heard of its possible connection with leprosy, but I doubt that many of us have explored their relationship.
Entamoeba histolytica (aka lettuce bug) is an intestinal parasite, and if I remember correctly, the first mobile organism we ever visualized under the microscope in high school or college biology. For many decades, most cases seen in the U.S. occur in recent immigrants and travelers returning from endemic areas.
Skin cancer is the most prevalent form of all cancers in the U.S., and the number of cases continues to rise. There are three main types of skin cancer: basal cell carcinoma, squamous cell carcinoma, and melanoma. The first two are less serious and make up 98 percent of all skin cancers.