Dr. Raymond R Zhou M.D., PH.D.

BactrimBactrim is a combination of antibiotics called trimethoprim and sulfamethoxazole, which help treat different types of bacterial infections. Bactrim can be used for the treatment of urinary tract infections (UTIs), ear infections, bronchitis, shigellosis, traveler's...

As pigmentation cells stop producing the pigment, gray hair is the result. It may also be bleached by the accumulation of hydrogen peroxide, a chemical naturally produced in the body. In most cases, graying occurs by the time an individual is 30-years-old. Most people have gray hair by the time they...

IntroductionNicotine is an alkaloid stimulant that comes from the nightshade family of plants, particularly from the leaves of tobacco. The type of nicotine found in tobacco plants is called Nicotiana tabacum. Nicotine can also be synthetically produced. Thousands of chemicals are contained in...

The black widow spider is one of the most poisonous spiders often seen in North America. These spiders thrive at moderate temperatures and are mostly found in the south and western US regions.They are often found in places surrounded by bushes, open areas such as outdoor bathrooms and toilets, open...

Mono or mononucleosis, is a viral infection caused by the Epstein-Barr virus. This infection is also known as the "kissing disease". This condition is very common among teenagers and adults. Mono may persist for weeks and months together, but resolves on its own without any particular treatment....

Introduction Chikungunya is a viral infection that is transmitted by mosquitoes. The chikungunya virus causes a sudden onset of fever along with severe joint pain. The illness is not considered as contagious, but in rare instances, the virus can get transmitted through contact with a person's...