All definitions were retrieved from Dictionary.com

Bacterium -ubiquitous one-celled organisms, spherical, spiral, or rod-shaped and appearing singly or in chains, comprising the Schizomycota, a phylum of the kingdom Monera (in some classification systems the plant class Schizomycetes), various species of which are involved in fermentation, putrefaction, infectious diseases, or nitrogen fixation

Borrelia burgdor -a bacterium that is spread thought ticks to cause Lyme Disease

Boils -a painful, circumscribed pus-filled inflammation of the skin and subcutaneous tissue usually caused by a local staphylococcal infection

Booster shot -also called booster dose, booster shot. a dose of an immunizing substance given to maintain or renew the effect of a previous one

Bout -period; session; spell

Brain -the part of the central nervous system enclosed in the cranium of humans and other vertebrates, consisting of a soft, convoluted mass of gray and white matter and serving to control and coordinate the mental and physical actions

Bronchitis -constant swelling of the membrane lining of the bronchial tubes, caused by respiratory diseases or infections

C:

Cellulitis -inflammation of cellular tissue

Cerebrospinal - of or relating to the brain and spinal cord

Chloramphenicol -a colorless, crystalline, slightly water-soluble antibiotic that is used chiefly in the treatment of infections caused by certain bacteria, by rickettsiae, and by certain viruses

Cholera -an acute, infectious disease, endemic in India and China and occasionally epidemic elsewhere, characterized by profuse diarrhea, vomiting, cramps, etc.

Chronic -relating to an illness or medical condition that is characterized by long duration or frequent recurrence. Diabetes and hypertension are chronic diseases

Congestion -an excessive or abnormal accumulation of blood or other fluid in a body part or blood vessel

Contract -to get or acquire, as by exposure to something contagious

D:

Dehydration -the act or process of dehydrating; an abnormal loss of water from the body, esp. from illness or physical exertion

Dementia -severe impairment or loss of intellectual capacity and personality integration, due to the loss of or damage to neurons in the brain