Test Answers on bacteriology

zChapter 12 Clinical Bacteriology

S. aureus skin, subcutaneous infections, bacteremia,endocarditis, toxic shock, food poisoning catalase +, facultative anaerobes S. epidermidis opportunistic, nosocomial infectionsnormal skin flora and an opportunist that causes endocarditis of artificial heart valves catalase +, facultative anaerobes Streptococcus pyogenes ?-hemolytic Streptococcus agalactiae Group BBeta hemolyticNormal flora of GI urogenital tractsInfection acquired in utero at birthNeonatal bacteremia, pneumonia, […]

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Veterinary Bacteriology: Test 1 old exam questions

Using the nomenclature of the A-B model for binary toxin structure, the B subunit of anthrax toxin would most closely correspond to… protective antigen (edema factor and lethal factor would be A / active subunit)   The principal polymer structure of a bacterial cell wall (peptidoglycan) acquires most of its strength at a final step […]

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Medical Bacteriology

Scalded Skin Syndrome (SSS)is caused by? an Exfolative toxin Urinary Tract Infections are caused by? Staphylococcus saprophyticus Nosocomial Infections (catheters) are derived from? Staphylococcus epidermis Staphylococcal food poisoning is caused by? Staphylococcus entertoxin Toxic Shock Syndrome is caused by? TSST – 1 Name the bacteria that have positive coagulase. Staphylococcus aureus Name the negative coagulase […]

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Answers on Determinative Bacteriology Flashcards

GBS commonly colonizes what areas? Lower GI tract and Vaginal epithelium of healthy adults. The first GBS strain was studied by whom? Rebecca Lancefield. First GBS strains studied by Lancefield were isolated from what? Cows with mastitis. First report of GBS in humans appeared in what year? 1938 What is the gram stain and morphology […]

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Flashcard Answers on Determinative Bacteriology

General Characteristics of Enterobacteriaceae   Gram – rod motile via peritrichous flagella or non-motile No spores grow on peptone based media without additional NaCl grow well on MAC Aerobic and Anaerobic growth, generally facultative anerobes ferment glucose with gas production catalase + oxidase –  NO3—->NO2 Widely distributed in nature, i.e. plants, soil, and water S. […]

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Determinative Bacteriology Exam Test

Corynebacterium •Gram positive, straight or slightly curved, thin rods that are slightly tapered or have “club ends”. •Various arrangements, “Chinese letter”  •1883 Klebs described the strain  •1884 Loeffler proved it caused diphtheria                         •Genus contains: –Gram positive, straight or slightly curved thin rods that have […]

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Test Questions on Determinative Bacteriology

Taxonomy of the family Neisseriaceae •Based on 16s rRNA sequences and hybridization studies. •Genus Neisseria 16 species.   N. gonorrhoeae, N. meningitidis, N. lactamica, N. sicca, N. subflava, N. mucosa, N. flavescens, N. cinerea, N. polysaccharea, N. elongata, N. weaveri, N. canis, N. macacae, N. denitrificans, N. iguanae, N. dentium   Neisseria gonorrhoeae History   •Historical:  […]

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Determinative Bacteriology Test Answers

Group B Streptococci   •GBS, commonly colonize the lower gastrointestinal tract and vaginal epithelium of healthy adults, but they remain a potentially devastating pathogen to susceptible infants.  •Because the newborn is deficient in host defenses, ie, phagocytes, complement and specific antibody; therefore an environment exists for potential problems •The first strains of GBS were studied […]

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Determinative Bacteriology Flashcard Answers

Classification of the Streptococci, Enterococci and Streptococci like bacteria    Based on molecular methods, DNA-DNA hybridizations, and 16s rRNA sequencing.    Current classification    •Order “Lactobacillales” •Family “Staphylococcaceae” –Genus Gemella •Family “Lactobacillaceae” –Genus Pediococcus •Family “Carnobacteriaceae” –Genus Alloiococcus, Dolosigranulum •Family “Enterococcaceae” –Genus Enterococcus, Vagococcus, Melissococcus •Family “Leuconostocaceae” –Genus Leuconostoc, Oenococcus, Weissella •Family “Streptococcaceae” –Genus Streptococcus, Lactococcus […]

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Test Answers on Determinative Bacteriology

Micrococcus   •Gram positive cocci •Tetrads, clusters •Aerobic •Nonmotile •Catalase+ •Oxidase+ •Genetic relatedness to Arthrobacter and Actinomyces. •Found in the environment and transient flora skin  of humans and other animals. •M. luteus, M. lylae   Planococcus •Gram positive cocci •Pairs, tetrads •Aerobic •“motile coccus”, all strains have 1 to 3 flagella •Catalase + •Oxidase + […]

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Determinative Bacteriology Flashcards with Answers

List some characteristics of Mycobacteria Acid fast/not G- or G+ non spore-forming non motile walls are rich with lipid content not reactive to staining with analine dyes straight, slightly bent rods mycolic acids allow it to grow in sputum Which species of Mycobacterium are slow growers, and what defines a slow grower? M. bovis M. […]

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BASIC BACTERIOLOGY ELDER

Commensalism Relationship of convenience. One species benefits, the other neither benefits nor is harmed.This can shift to mutualism or parasitism.ex- normal flora of gut, skin, and mucous membranes Symbiosis/Mutualism Reciprocal benefits exist for one or both organismsex- some human enteric bacilli secrete vit K; gut bacteria assist in establishment of tolerance to bacterial antigens Parasitism […]

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Bacteriology Test Questions

Acid-fast MycobacteriumNocardia (partial) Aerobic respiration oxidation of substrates coupled to electron transport with O2 as final electron acceptor38 ATP/glucose Aerointolerant anaerobes with non-oxygen final electron acceptorsvery sensitive to oxygen radicalsquite a few of the medically relevant bacteria Aerotolerant anaerobes with non-oxygen final electron acceptorscan detoxify oxygen radials with superoxide dimustase and catalasequite a few of […]

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Bacteriology

Phenolic compounds affect lipid-rich plasma membranes, so the cell leaks its contents (especially useful against mycobacteria) Phenol coefficient ratio of antimicrobial activity compared to pure phenol. smaller means more active alcohols denatures proteins and dissolves lipids which disrupts membranes quaternary ammonium compounds decreases surface tension and thereby attacks plasma membranes ethylene oxide replaces protein functional […]

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Bacteriology/Mycology

What is the standard incubation temperature for bacteria? 37 C At what temperature are plasmids inactivated? 60 C What temperature kills most bacteria? 80-90 C Do Koch’s postulates apply to all diseases? No What is the term for the asymptomatic state of a disease, for example TB? Carrier State What is necessary to see bacteria […]

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Bacteriology Lab Midterm

Give the Gram reaction and morphology [image] Gram-positive cocci (sarcina – tetrads) Give the Gram reaction and morphology [image] Gram positive bacilli Gram reaction and morphology [image] Gram negative coccobacilli Gram reaction and morphology [image] Gram negative bacillus Name the type of hemolysis for A [image] beta hemolysis Name the type of hemolysis for B[image] […]

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Bacteriology Exam 2

Neonatal Enteritis1) Name the organism that causes _____2) Symptoms of ____3) Species affected 1) Escherichia coli (ETEC with LT and or ST + K88)2) watery diarrhea in first 12 hours, high mortality3) Pigs Weanling Enteritis1) Name the organism that causes _____2) Symptoms of ____3) Species affected 1) Escherichia coli (ETEC with LT/ST but no adhesion2) […]

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10.17 Intro to Bacteriology

What type of ribosomes are in eukaryotes? 80S T/F Most bacteria possess peptidoglycan true T/F Prokaryotic mRNA is usually spliced before it can be translated. false! prokaryotic mRNA does not need processsing What are the four steps of the gram stain? step 1= crystal violet for 1 min, rinsestep 2= Gram’s Iodine for 1 min, […]

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