Unit 12: Infection 2023 with 100% questions and answers

nonpathogen a microorganism (microbe) that does not cause disease T or F: "microbe" is another way to say "microorganism" true T or F: there are microbes in beer, cheese, yogurt and bread that are not harmful to us true some are actually beneficial pathogen microorganism that causes disease normal flora microorganisms that live on or within our bodies that we actually require for normal life only cause infection if person is already sick or if they move to an area where they are not usually found infection when pathogen(s) invade body and cause disease 4 types of microbes 1. bacteria 2. viruses 3. fungi 4. protozoa bacterium one-celled microbe plural: bacteria has no nucleus or organelles coccus/i round or spherical shape (bacteria) bacillus/i straight rod shape (bacteria) spirillum/a spiral, corkscrew, or curved shape (bacteria) colony group/cluster of bacteria 4 types of bacterial colony arrangement 1. single (1 bacterium) 2. pair 3. chain 4. cluster diplo- referring to arrangement of a pair of bacteria strepto- referring to arrangement of a chain of bacteria staphylo- referring to arrangement of cluster of bacteria What percentage of dry human weight can be attributed to bacteria in/on us? a. 1% b. 5% c. 10% d. 15% c T of F: a yeast is a single-celled fungus true parasite organism that lives on or in another organism, harming the host organism virus smallest microbe contains DNA or RNA and little else T or F: a virus is a living organism false it cannot reproduce without host T or F: influenza is caused by a bacterium false virus T or F: the common cold is caused by a virus true T or F: antibiotics are effective against both bacterial and viral infections false they do not affect viruses protozoa(n) simple, one-celled eukaryotic organism (has organelles and nucleus) live on living matter classified by how they move dysentry lower GI infection caused by a protist 6 components of chain of infection 1. susceptible host 2. causative agent 3. reservoir or source of pathogen 4. portal of entry 5. method (mode) of transmission 6. portal of exit T or F: humans can be considered a pathogen resevoir true T or F: pathogens like "hide" in your cuticles, between fingers, and under jewelry true fomites objects that become contaminated with infectious material containing a pathogen carrier person who has infectious agents in/on them and can give disease to others case person witn signs and symptoms of an illness incubation period time between initial entry of pathogen into host and time signs and symptoms appear pathogens multiply during this period T or F: pathogens cannot enter the body via the genitourinary tract false T or F: pathogens cannot be passed from mother to fetus through the placenta false Which of the following is NOT a portal of exit (select all that apply)? a. urine b. feces skin cells d. draining wounds e. semen/vaginal excretions f. sputum from respiratory tract g. blood h. saliva i. tears j. hair c, j