aerobe - an organism, such as a bacterium, requiring molecular oxygen or air to live.
  anaerobe - a microorganism, as a bacterium, able to live in the absence of free oxygen.
  Bacillus - 1. any of various spore-forming, rod-shaped, aerobic or anaerobic bacteria of the genus Bacillus, often occuring in chainlike formations most of which are Gram-positive. 2. any of various bacteria; especially, a rod-shaped bacterium.
  bacteria - Any of numerous unicellular microorganisms of the class Schizomycetes, occurring in a wide variety of forms, existing either as free-living organisms or as parasites, and having a wide range of biochemical, often pathogenic, properties. synonym - germ.
  Campylobacter - genus of Gram-negative bacteria found in the intestinal tract and reproductive organs of animals and the intestinal tract of humans.
  Clostridium - Any of various Gram-positive, rod-shaped, spore-forming, chiefly anaerobic bacteria of the genus Clostridium, such as the nitrogen-fixing bacteria found in soil and those causing botulism.
  Cryptosporidium - genus of minute protoza; they are parasitic in the intestinal tracts of many different vertebrates including reptiles, birds and mammals.
  E. coli - genus of Gram-negative, anaerobic, rod-shaped bacteria found in the large intestine of humans and other warm-blooded animals.
  encephalitis - inflammation of the brain. also called "brain fever". Common initial symptoms may be headache, nausea, vomiting, fever & lethargy.
  fungus - any of numerous plants of the division or subkingdom thallophyta, lacking chlorophyll, ranging in form from a single cell to a body mass of branched filamentous hyphae that often produce specialized fruiting bodies, and including the yeasts, molds, smuts, and mushrooms.
  germ - 1. Biology. A small organic structure or cell from which a new organism may develop. 2. Something that may serve as the basis of further growth or development. 3. Medicine. A microorganism; especially a pathogen.
  Giardia - genus of protozoa parasitic in the intestines of man and animal.
  Gram-negative - denoting a microorganism that fails to retain the crystal violet dye used in Gram's stain.
  Gram-positive - denoting a microorganism that retains the crystal violet dye used in Gram's stain.
  Hepatitis - inflammation of the liver, caused by infectious or toxic agents, characterized by jaundice, and usually accompanied by fever and other systemic manifestations.
  immunocompromised - reduced immune response due to immunosuppressive drugs, radiation, disease or malnutrition.
  immunosuppressive - 1. modifying the immune response, in a negative way, so it will have a diminished reaction to a foreign substance. 2. a drug with such a capability.
  Listeria monocytogenes - a genus of Gram-positive occurring as small rods. Produces upper respiratory disease, septicemia and encephalitic disease.
  malaise - feeling of uneasiness or indisposition.
  meningitis - inflammation of any or all of the meninges (membranes) of the brain and the spinal cord, usually caused by a bacterial infection.
  pasteurization - the process of destroying most disease-producing microorganisms and limiting fermentation in milk, beer, and other liquids by partial or complete sterilization.
  pathogen - Any agent that causes disease, especially a microorganism such as a bacterium or fungus.
  Salmonella - Any of various Gram-negative rod-shaped bacteria of the genus Salmonella, many of which are pathogenic.
  Schizomycete - Any of numerous one-celled microorganisms of the class Schizomycetes, which includes the bacteria.
  septicemia - a systemic desease caused by pathogenic organisms or their toxins in the bloodstream. Also called "blood poisoning". It is accompanied by chills, sweating, fever and exhaustion.
  Shigella - genus of Gram-negative, anaerobic, rod-shaped bacteria. Consists of four (4) species, all of which cause dysentery (inflammation of the intestines).
  Staphylococcus - Any of various Gram-positive, spherical parasitic bacteria of the genus Staphylococcus, occuring in grapelike clusters and causing boils, septicemia, and other infections. Also called "staph".
  Vibrio - any of various S-shaped or comma-shaped microorganisms of the genus Vibrio.
 
  References:
Benjamin F. Miller, MD and Claire Brackman Keane, RN, BS, MEd. 1987. Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, W.B. Saunders Co.

Ida Dox, Biagio John Melloni, PhD, Gilbert M. Eisner, MD, F.A.C.P. 1985. Melloni's Illustrated Medical Dictionary. Williams and Wilkins.

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