Low-Income Southerners at Highest Risk for Vision Loss

FRIDAY, May 22, 2015 (HealthDay News) -- New U.S. government research connects eyesight problems with poverty, and reveals that people in the southern part of the country have the highest prevalence of both poverty and severe vision loss.

Fish Oil Tied to Better Brain Function in Older Adults

FRIDAY, May 22, 2015 (HealthDay News) -- Consuming more omega-3 fatty acids -- found in many types of fish -- may benefit people at risk for Alzheimer's disease, a new study suggests.

Diet and Exercise May Not Stave Off Age-Related Muscle Loss

FRIDAY, May 22, 2015 (HealthDay News) -- It's not clear whether diet and exercise can prevent muscle loss as people age, a new British review finds.

Raw Tuna Suspected as Source of Salmonella Outbreak: CDC

FRIDAY, May 22, 2015 (HealthDay News) -- Raw tuna is suspected as the source of a salmonella outbreak that has now sickened 53 people in nine states, according to U.S. health officials.

Rugby Player's Head Injuries Linked to Brain Decline

FRIDAY, May 22, 2015 (HealthDay News) -- Add rugby to the sports that can lead to degenerative brain disease, a new study suggests.

Health Highlights: May 22, 2015

Here are some of the latest health and medical news developments, compiled by the editors of HealthDay:

Animals May Ease Social Anxiety in Children With Autism

FRIDAY, May 22, 2015 (HealthDay News) -- Being around animals may help reduce social anxiety in children with autism, new research suggests.

Health Tip: Exercise Boosts Heart Health

(HealthDay News) -- Exercise may be just what the doctor ordered to improve heart health.

Weight Training's Benefits May Depend on Genetics

THURSDAY, May 21, 2015 (HealthDay News) -- How well resistance exercises work may depend on a woman's genetic risk for obesity, new research suggests.

Vitamin D Levels Tied to Survival in Seriously Ill Cats

THURSDAY, May 21, 2015 (HealthDay News) -- Sick cats appear to have a better chance of survival if they have higher levels of vitamin D, a new study reveals.