Tag Archives: livescience com

SEVEN AFRICAN COUNTRIES DRAMATICALLY CUT CHILDHOOD HIV INFECTIONS


Seven African Countries Dramatically Cut Childhood HIV Infections

Botswana, Ethiopia, Ghana, Malawi, Namibia, South Africa, and Zambia have all made great strides in reducing new HIV infections in children. Since 2009, these seven countries have cut the number in half. Much of this success is the result of programs to getantiretroviral medications to HIV-positive pregnant women, thereby preventing the virus’ transmission to their offspring. Still, across most high-priority countries inAfrica, including those named above, access to AIDS drugs for pediatric patients remains “unacceptably low,” with only 30 percent of HIV-positive children getting the treatment they need. More… Discuss

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ARGYRIA


Argyria

Minimally toxic to humans and known for its antibiotic properties, silver has historically been used in a variety of medical and industrial applications. However, prolonged exposure to silver can result in argyria, a permanent slate-gray or bluish discoloration of the skin, mucous membranes, and internal organs. Though the condition is not harmful, it is irreversible and, in some cases, very noticeable. What American politician took on a bluish tint after consuming a homemade silver concoction? More… Discuss

 

WILD SNAKES CAPABLE OF VIRGIN BIRTH


 

Wild Snakes Capable of Virgin Birth

Researchers in the US studying two snake species found two female snakes that each reproduced without a male. The phenomenon, which is not uncommon in invertebrates, is called facultative parthenogenesis, and occurs when an egg develops without fertilization by a sperm. Although it has been reported in snake, shark, lizard and bird species, it previously had been observed only in captive vertebrates. In the recent study, scientists captured pregnant cottonmouths and copperheads, two types of North American pit vipers, and one snake in each group produced offspring that had only the mother’s genetic material. More… Discuss