Word: bacterias
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Since the bacteria that cause TB spread through the air, they threaten not only AIDS patients but healthy people as well. Those with an intact immune system can usually fight off the infection, but this does not hold true for people who harbor HIV. Until the resurgence of TB, medical personnel who were HIV-positive but still healthy could work on AIDS floors without jeopardizing their own or anyone else's well-being. Now they will face a greater risk of encountering and developing TB. More AIDS patients are thus likely to be treated under quarantine conditions to avoid spreading...
...faster your skin dries after rainfall and the less likely you are to get parasitic fungi and footworms. Fay has already accumulated four nasty footworms, which burrow under the skin until they discover that you are not a pig or elephant -- their proper hosts. The worms then die, but bacteria in the little corpses infect your feet...
Other dangers begin once the fish is out of water. Because bacteria that live on fish are adapted to withstand the cool and cold waters of lakes and oceans, they can thrive in temperatures cold enough to preserve other foods. Such microbes will quickly spoil the catch of the day, unless it is confined without delay to temperatures close to freezing. Even under the best conditions, most fresh fish lasts only seven to 12 days. But it frequently takes as long as seven days for fish to make the journey from the fisherman's net to the supermarket, where...
...medical researchers at Yale and Harvard say they have come up with a vaccine that appears to protect against Lyme disease -- in mice, at least. Not only that: when infected ticks bit vaccinated mice in the lab, the disease bacteria inside the ticks were killed as well. That was totally unexpected; if it works the same way in humans, the vaccine could lead not only to the prevention of Lyme disease in humans but to its complete elimination in the wild...
Allergies, like autoimmune diseases such as arthritis and lupus, result from aberrant functioning of the human immune system, the body's remarkable defense against dangerous invaders, including viruses, bacteria and parasites. In the case of hay fever, the immune system perceives the fuzzy grain of pollen as a threat. The cause of the confusion, explains botanist Walter Lewis of Washington University in St. Louis, is a chemical message encoded by proteins in the pollen grain's cell wall...