Paronychia is an infection of skin surrounding nails. Acute paronychia appears suddenly after nail injury. Chronic paronychia develops slowly from inflammation. Acute caused by aggressive manicuring or nail biting. Chronic common in diabetics and workers exposed to chemicals
H. pylori bacteria infects stomach, usually during childhood. More than half of world's population may have H. pylori infection. Most people don't know they have infection
Blastocystis is a microscopic parasite living in digestive tract. Can be transmitted through contaminated food, water or feces. More common in developing countries and animal workers. Now known as Blastocystis spp, multiple species exist
Bartholin's cyst occurs when fluid fills up in one of two glands at vaginal opening. Glands are located at either side of vaginal entrance. Around 2% of people with vagina develop it at some point
Blood in semen (hematospermia) is common but usually harmless. Younger men under 40 often recover without treatment. Men over 40 need evaluation if recurring or symptomatic
Gram-positive bacterium commonly found on human skin and mucous membranes. Forms spherical cells (0.5-1.5 µm) that divide in multiple planes. Lacks coagulase enzyme, unlike coagulase-positive staphylococci. Part of human normal flora, particularly in axillae, head, and nares