Mmbio 221 Study guides, Class notes & Summaries

Virulence characteristics, unique properties, and diseases caused by: Mycobacterium tuberculosis, - -virulent strains contain cord factor (cell wall component) which is necessary to cause disease -3 types: primary (results from initial infection), secondary (reestab. of active infection after period of dormancy), disseminated (when infection spreads thru body) -high risk ppl are those who contact infected persons and those with immunodeficiencies (HIV--combo has 90% chance of death) -diagno...

Suspected Case - shows symptoms consistent w/ outbreaks Probable Case - symptoms consistent w/ definition Prevalence - number of cases of a disease that is always in an area prevelance rate= total cases/ population Incidence - number of new cases/number of people at risk of the disease Kochs Postulates - 1. The suspected organism should be present in all cases of the disease and absent from healthy animals 2. The suspected organism should be grown in pure culture 3. Cells from ...

What is a semiautonomous organelle? Correct Answer-organelle with DNA which two organelles are semiautonomous? Correct Answer-mitochondria & chloroplasts what is the endosymbiotic theory? Correct Answer-explains how eukaryotic cells may have evolved from prokaryotic cells what are terms associated with bacterial flagellum? Correct Answer-filament, hook, rod, and rings what type of cell has the most peptidoglycan? Correct Answer-Gram + what is the structural part of the cell wall w...

Disinfection - destruction of vegetative pathogens; usually on inanimate objects. Antiseptic - agent which prevents bact. contamination and growth; usually on living tissue. Which agent doesn't necessarily work better at higher concentrations? - Alcohol, 70% (goldie lock zone)(60-80% most effective) (Ethyl and Isopropyl) -Alcohol is very effective to resistant to inactivation by organic materials (halogens are not good at this) Name the factors that affect a disinfectant activity. ...

Developed smallpox immunization using cowpox agent - Edward Jenner Sought a "magic bullet" to destroy pathogens & not host - Paul Ehrlich Discovered penicillin - Alexander Fleming Pioneered aseptic surgery, Prevented surgical infections by using mists of phenol - Joseph Lister Father of Epidemiology (Cholera in London) - John Snow Pioneered asepsis by discovering that hand washing prevented streptococcal infections in obstetric patients - Ignaz Semmelweis Pioneered the culti...

Chapter 16 MMBIO 221 Questions with Complete Solutions

MMBIO 221 Bacteria/Viruses Questions with Complete Solutions

sources of contamination - individuals that live in the home, especially their skin food brought into the home, raw and cooked water and air activities in the home like cooking, bathing types of microbes found on surfaces outside the home correlated with the types in the home pets, particularly dogs (higher diversity, relative species abundance) factors that influence the presence of microbes in our homes - temperature moistness lighting number of people in your home pets cleaning...

Structural part of the cell wall of most bacteria. Composed of polysaccharide chains containing repeat units of N-acetylmuramic acid and N-acetylglucosamine, cross-linked by short chains of amino acids. Correct Answer-Peptidoglycan Found only in the outer membrane of gram-negative cells; lipid A is the active component; they are also called endotoxin. Correct Answer-Lipopolysacharides This gelatinous, sticky substance is usually composed of polysaccharides or proteins that surround the out...

What signs and symptoms may be seen in a cytomegalovirus infection? Correct Answer-Fever, hepatosplenomegaly, mental and/or developmental retardation, and death What is the causative agent of infectious mononucleosis? Correct Answer-Epstein-Barr virus What kind of pathogen is Rickettsia rickettsii? Correct Answer-Bacterium Infectious endocarditis is generally treated with which antibiotic? Correct Answer-Penicillin Rocky Mountain fever is treated using which antibiotics? Correct Answ...