Deadly evolution in progress via Horizontal Gene Transfer

BOSTON — An infectious-disease nightmare is unfolding: A new gene that can turn many types of bacteria into superbugs resistant to nearly all antibiotics has sickened people in three states and is popping up all over the world, health officials reported Monday.

The U.S. cases and two others in Canada all involve people who had recently received medical care in India, where the problem is widespread. A British medical journal revealed the risk last month in an article describing dozens of cases in Britain in people who had gone to India for medical procedures.

How many deaths the gene may have caused is unknown; there is no central tracking of such cases. So far, the gene has mostly been found in bacteria that cause gut or urinary infections.

Scientists have long feared this — a very adaptable gene that hitches onto many types of common germs and confers broad drug resistance.

The U.S. cases occurred this year in people from California, Massachusetts and Illinois, said Brandi Limbago, a lab chief at the Centers for Disease Control and Prevention. Three types of bacteria were involved, and three different mechanisms let the gene become part of them.

http://www.msnbc.msn.com/id/39155065/ns/health-infectious_diseases/

Evolutionary changes can and do occur in all species of plants and animals via two methods: gene mutations and horizontal gene transfers between different species.