by Linda Fugate, PhD

Some smokers get lung cancer and others do not. The reason for this may involve bacterial infection, according to a review by Dr. Seyed Javad Moghaddam of the University of Texas MD Anderson Cancer Center, Houston, Texas, and colleagues at three other research institutions. Nontypeable Haemophilus influenzae (NTHi) is the main culprit, they reported. This pathogen is similar to Haemophilus influenzae type b (Hib), which is a common cause of meningitis, pneumonia, and ear infections in children who have not been vaccinated against it. The nontypeable variety is missing the polysaccharide capsule present in Hib and other, less common varieties.