Which of the following statements is false? Blackhead pimples are comedones that are covered by skin. Bacillus anthracis uses a capsule to help evade the immune response. Isotretinoin is used to treat acne, but only in severe cases because of potentially severe side effects. The immune system is often able to clear warts without medical treatment.
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Which of the following is false concerning Staphylococcus aureus It is found in the carrier state commonly in the nose It is coagulase positive Associated with common food-borne infection after nose picking with growth in food after lack of refrigeration, & with projectile vomiting & diarrhea after 2-3+ days It can produce toxic shock syndrome which was first observed in females using a new brand of highly absorbent, long use tampons MRSA and VRSA. QUESTION 19 Which of the following is false concerning Escherichia coli? EPEC and EHEC associate by attaching and effacing lesions ETEC attach via fimbria/pili adhesin CFAs to the unaltered microvilli ETEC causes traveler’s diarrhea due to ST/LT. EHEC cause colitis and bloody diarrhea & HUS due to Shiga toxin All of the above are true QUESTION 20 Which of the following is false concerning your immune system? The tuberculin test is an example of delayed hypersensitivity (with induration because of influx of sensitized T cells and macrophages). Type I interferons (INFa & INFb) are associated with antiviral activities. Three (Types I-III) of the four general types (I-IV) of hypersensitivity are antibody mediated. Apoptosis is cell death triggering (causing) inflammation. Stem cells differentiate to B cells in the bone marrow and T cells in the thymus
Sri K.
30. Chronic granulomatous lesions containing sulfur granules is diagnostic of this pathogen a. Peptostreptococcus b. Acinetobacter c. P. acnes d. Actinomyces 31. Bacterial vaginosis is characterized by an increase in a. Staph aureus b. Lactobacillus c. Mobiluncus d. Chlamydia 32. The Brucella species most often causing disease in the U.S. a. suis b. melitensis c. canis d. abortus e. tularensis 33. The main reservoir of Bordetella pertussis is domestic pets. TRUE FALSE 34. Exotoxin A production by Pseudomonas aeruginosa disrupts the production of a. cell membrane b. cell wall c. nucleic acids d. proteins 35. A nosocomial non-fermenting gram negative bacillus that is oxidase negative is a. Pseudomonas b. Aeromonas c. Stenotrophomonas d. Neisseria 36. Intra-abdominal abscesses are usually the result of a. Clostridium botulinum b. a single aerobic pathogen c. mixed aerobic and anaerobic pathogens d. Salmonella or Shigella 37. Rocky Mountain Spotted Fever is transmitted a. where contaminated food is served b. through close personal contact c. by human body lice d. by dog or wood ticks An accumulation of replicating organisms called morulae, found in the cytoplasm of white blood cells, is diagnostic for a. malaria b. chlamydia c. rocky mountain spotted fever d. ehrlichiosis Which of the following is not a trait of Chlamydia? a. contain both DNA and RNA b. transmitted by arthropod vectors c. produce an inert form d. obligate intracellular parasites When isolating a pathogen from a disease site, recovery or detection of that pathogen may not be possible due to a. not meeting the metabolic needs of the pathogen b. insufficient c. failing to maintain proper transport conditions d. all of the above Impetigo is an infection caused by a. Staph aureus not Strep pyogenes b. Strep pyogenes not Staph aureus c. Staph aureus or Strep pyogenes d. neither Staph aureus nor Strep of scarlet fever is caused by an erythrogenic toxin, which is coded by a phage. TRUE FALSE granuloma venereum is a sexually transmitted disease caused by a. Treponema pallidum b. N. gonorrhoeae c. Chlamydia trachomatis
23. Which of the following is false concerning fungal infections? Different locations of dermatophytic infections are designated Tinea corporis. Most serious human fungal infections are acquired from other people. Dimorphism (yeast mold) is observed with certain systemic fungal infections. Trichophyton, Epidermophyton, and Microsporum are dermatophytes that cause infections of the skin, nails, and hair. 24. Concerning helminths, which of the following is false? Nematodes have a body cavity and a digestive tube ending in males and females. Cestodes have no body cavity, no digestive tube, and are hermaphroditic. They are all chemoheterotrophs. Trematodes have a body cavity and a digestive tract ending in a cecum. None of the above is false. 25. Which of the following is false concerning helminths? Schistosoma mansoni requires both human and specific snail hosts. Taenia solium can acquire a mask of host antigens for disguise. Ingestion of the eggs of the beef tapeworm causes cysticercosis with systemic spread of larvae. Ascaris lumbricoides forms "worm balls" in the intestine. Liver damage with Schistosoma mansoni results from the host response (granulomas) around eggs recognized as foreign. 26. Which of the following is false concerning Streptococcus pyogenes? Gram-positive bacteria called Group A strep causes strep throat. It can cause rheumatic fever with heart damage if untreated and kidney problems (acute glomerulonephritis) if untreated. 27. Which of the following is false concerning viruses? They can have DNA or RNA, but not both, and can be single or double-stranded. Some viruses are enveloped. Some viruses have one or a few enzymes. Viruses can have icosahedral, filamentous, or complex morphology. All of the above are true of viruses. 28. Antibiotics that target cell wall synthesis ultimately cause bacterial cell death as a result of inhibition of protein synthesis, inhibition of molecular transport, decreased synthesis of plasma membrane, osmotic lysis, and cell shrinkage.
Adi S.
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