Microbiology and Parasitology questions and answers

Microbiology and Parasitology questions and answers When was the term microbiology first used - 1860s What four areas of study are encompassed by clinical microbiology - Viruses, fungi, bacteria, and parasites What is the difference between a pathogen and an opportunistic pathogen - Pathogen: a bacteria capable of causing a disease Opportunistic pathogen: microorganisms that invade the body and cause illness only when the body's immune defense are impaired or absent How do bacterial pathogens cause host damage - The damage is caused by bacterial growth in tissues or y the toxins bacteria produce What are the morphological types of bacteria - Coccus, bacillus, and spirochete What are the morphological forms of fungi - Molds and yeast What is a gram stain? - A test that uses a series of stains to differentiate the composition of their cell walls Gram positive- violet (retain the crystal violet stain) Gram negative- pink (lose the crystal violet and retain the safranin