FRIDAY, Aug. 22 (HealthDay News) -- A molecule that tames bacteria that cause gastroenteritis, tularemia and severe diarrhea has been identified by researchers at the University of Texas Southwestern Medical Center at Dallas.

The finding, they say, could help in the development of new drugs to combat increasing microbial resistance to antibiotics.

The molecule LED209 blocks a bacterial receptor, called QseC sensor kinase, from biochemical signals from the host that trigger bacteria to release toxins and cause illness.

WEDNESDAY, June 25 (HealthDay News) -- A new vaccine for rotavirus -- a leading cause of vomiting and diarrhea in infants and children -- may account for this year's less severe season, the U.S. Centers for Disease Control and Prevention said Wednesday.

The highly contagious virus is shed in the stools of infected people and is transmitted by contaminated hands and objects. Children can transmit the virus before and after they become sick with diarrhea.

FRIDAY, April 4 (HealthDay News) -- The U.S. Food and Drug Administration has approved a second oral vaccine for the prevention of rotavirus, an infection that causes vomiting and diarrhea in infants and children.