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Homework answers / question archive / Chapter 19 1)What clinical manifestation do Staphylococcus aureus and Staphylococcus epidermis share? Which of the following has been historically classified as Gram-negative bacteria but its genetically more similar to low G + C Gram positive bacteria?   What is one virulence factor that differentiates Staphylococcus aureus from other species of staphylococci?   Over 90% of Staphylococcus aureus isolates are penicillin-resistant

Chapter 19 1)What clinical manifestation do Staphylococcus aureus and Staphylococcus epidermis share? Which of the following has been historically classified as Gram-negative bacteria but its genetically more similar to low G + C Gram positive bacteria?   What is one virulence factor that differentiates Staphylococcus aureus from other species of staphylococci?   Over 90% of Staphylococcus aureus isolates are penicillin-resistant

Biology

Chapter 19

1)What clinical manifestation do Staphylococcus aureus and Staphylococcus epidermis share?

  1. Which of the following has been historically classified as Gram-negative bacteria but its genetically more similar to low G + C Gram positive bacteria?

 

  1. What is one virulence factor that differentiates Staphylococcus aureus from other species of staphylococci?

 

  1. Over 90% of Staphylococcus aureus isolates are penicillin-resistant. Why?

 

  1. A woman comes to the emergency department with fever and vomiting. She soon develops a red rash all over her body, and her blood pressure begins to drop. What is one possible diagnosis?

 

  1. Bacteria collected from a severely inflamed wound are sent to the lab for analysis. the results come back as follows: Gram-positive cocci in irregular clusters, kinase and coagulase positive, and able to grow in the presence of most antibiotics except vancomycin. the bacteria in the wound is most likely

 

  1. Streptococci are frequently classified by

 

  1. How do group A streptococci camouflage themselves from white blood cells?

 

  1. Which of the following diseases is considered an autoimmune disease triggered by bacterial infection?

 

  1. Which of the following statements about "flesh-eating" streptococci is FALSE?

 

  1. Streptococcus agalactiae is associated with which of the following diseases?

 

  1. Which of the following statements regarding Streptococcus progenies is FALSE?

 

  1. What differentiates virulent strains of Streptococcus pneumonia from nonvirulent strains?

 

  1. Untreated streptococcal pharyngitis may progress to

 

  1. The Quellung reaction is used to diagnose

 

  1. Otitis media may lead to dangerous meningitis in children due to infection with

 

  1. Which of the following staphylococcal virulence factors produce the signs and symptoms of scalded skin syndrome?

 

  1. During a stay in the hospital, an accident victim develops symptoms of bacteremia. A blood sample shows the presence of Gram-positive cocci in pairs. Lab tests determine that the bacteria are non hemolytic and bile salt tolerant. the bacteremia is likely due to

 

  1. Anthrax, which means "charcoal" in Greek, derives its name from

 

  1. Which of the following statements about Bacillus anthraces is FALSE?

 

  1. Which of the following bacteria produce one of the most deadly bacterial toxins known?

 

  1. Which of the following bacteria can cause life-threating pseudomembranous colitis?

 

  1. How does the toxin from Clostridium tetani produce its action?

 

  1. Which of the following statements concerning tetanus is FALSE?

 

  1. Listeria virulence is directly related to its ability to

 

  1. Which of the following bacteria divide by "snapping division" in which daughter cells remain attached in characteristic V-shapes?

 

  1. Members of the genus Mycoplasma are pleomorphic and stain Gram-negative because they

 

  1. A sample of fluid from the lungs contains microbes that grow in filaments or clumps. the cells stain poorly in the Gram stain and are a pink-red when acid fast stained. the bacteria in the sample are

 

  1. Mycetoma, which is a painless long lasting infection characterized by swelling, pus production, and draining sores, is caused by

 

  1. the skin lesions characteristic of cutaneous infections with Bacillus anthraces are

 

  1. The soil bacterium Nocardia asteroids can establish opportunistic infections of the

 

  1. Enterococcus faecalis bacteria can be distinguished from other gram positive cocci because enterococci

 

  1. Infections with Streptococcus progenies may progress to _____, characterized by a skin rash that peels after about a week and a bright red swollen tongue.

 

  1. Increased sebum secretion can fuel the overgrowth of the opportunistic pathogen ______ in its normal habitat, leading to disease.

 

  1. Streptococcus pneumoniae is a leading cause of

 

  1. Mycoplasma pneumoiae causes respiratory disease by

 

  1. Which of the following is a key diagnostic indicator of infection with Mycobacterium leprae?
  2. Which of the following is NOT a feature of the pathogenesis of Clostridium perfringens?

 

  1. Which of the following bacteria can cause pharyngitis?

 

  1. A summer cold that lasts for weeks and is characterized by sore throat, mild fever, dry cough, and malaise may be (pneumococcal/walking) pneumonia.

 

  1. The presence of mycelia acid in the cell walls of the opportunistic pathogen (Actinomyce/ Nocardia) results in it Gram staining poorly.

 

  1. In its role in the development of acne, (Propionibacterium/ staphylococcus/ actinomyces) typically grows in sebaceous glands of the skin.

 

  1. (MRSA/ MDR-TB/ VRSA) is resistant to numerous antimicrobial agents; therefore, vancomycin is usually used for these infections.

 

  1. In countries where tuberculosis is common, people are vaccinated with (BCG/DOTS/ MDR-TB) which contains attenuated Mycobacterium bovis bacteria.

 

  1. Infection with Corynebacterium diphtheriae leads to the formation of (pseudomembranes/ tubercles) which can severely impair respiratory function.

 

  1. Successful treatment of diphtheria requires the administration of (antibiotics/antitoxin/ immunoglobulin).

 

  1. Common sources of Listeria are undercooked meats and vegetables and unpasteurized (eggs/ milk/ juices).

 

  1. The neurotoxins of Clostridium botulinum produce (flaccid/ tetanic) paralysis by preventing muscle contraction.

 

  1. Bacterial food poisoning resulting from Clostridium (botulinum/ difficele/ perfringens) contamination is characterized by watery diarrhea accompanied by intestinal cramping but not fever, and it resolves in about a day.

 

  1. (Enterococcus/ Staphylococcus) grow at temperatures up to 45C, at pH levels as high as 9.6, and in 6.5% NaCl, but they lack structural and chemical elements that make them virulent in the intestinal tract.
  2. The aerobic endospore former (Clostridium perfringens/ Clostridium difficle/ Bacillus anthracis) is a strict pathogen of humans and animals.

 

  1. The body limits the migration of Streptococcus (agalactiae/ pneumoniae/ progenies) by binding it to the active sties of secretory IgA, which the bacteria overcome by secreting secretory IgA protease.

 

  1. When streptococcal infections involve the skin and surrounding lymph nodes, triggering pain and inflammation, the condition is known as (erysipelas/ folliculitis/ pyoderma).

 

  1. The ability to produce (hyaluronidase/ lipase/ proteases) enables Staphylococcus aureus to penetrate and spread through tissues.

 

 

Chapter 24

 

  1. Which of the following families of DNA viruses is the most prevalent in humans?

 

  1. What cell type can the Simplexviruses infect latently?

 

  1. An older adult is complaining of an intensely painful rash that has appeared as a patch on one side of his chest. This description is consistent with

 

  1. Characteristic features of the herpesvirus used for diagnosis include the

 

  1. Shingles or herpes zoster, is caused by the virus that also causes

 

  1. Which of the following statements concerning genital warts is FALSE?

 

  1. Pinkeye is caused by

 

  1. Adenoviruses infect

 

  1. A young man goes to a clinic complaining of discomfort in his foot especially when standing. Upon examination, the clinician observes raised bumps with rough surfaces on the sole of his foot. These lesions are consistent with

 

  1. Which of the following is the only DNA virus that that can cause viral hepatitis?

 

  1. Gamma interferon is sometimes used to treat infections with

 

  1. Which of the following increases the risk of permanent liver damage with hepatitis B infection?

 

  1. Hepatitis B virus releases a large amount of viral antigen, which benefits the patient by

 

  1. Which of the following statements concerning the hepatitis B vaccine is FALSE?

 

  1. A scientist discovers a new virus that causes mild respiratory disease in humans. He is able to isolate, purify, and characterize the virus. the virus preparation contains double stranded DNA and no lipid. to which of the following virus families does this new virus likely belong?

 

  1. The large size of poxviruses allows them to

 

  1. Which of the following viruses exist only in laboratory stocks?

 

  1. Which of the following viruses are oncogenic?

 

  1. The common name for the disease caused by human parvovirus B19 is

 

  1. A blood sample showing neutropenia and large B lymphocytes with atypical nuclei is characteristic of infection with

 

  1. What conditions may trigger reactivation of latent herpesvirus infections?

 

  1. Vaccinia, or cowpox, was used to eradicate the related small pox virus. this would make it an

 

  1. A homeschooled child recently visited an ailing great-grandparent who was complaining of a painful rash. Even though the child had had no contact with children suffering from chickenpox, the child developed chickenpox. how id the child contract the infection?

 

  1. Virions known as Dane particles are the infectious form of

 

  1. A childhood illness caused by a herpesvirus and characterized by a "rosy" rash all over the body is known as

 

  1. Infection of the respiratory system by _____ may develop into symptoms of a common cold

 

  1. Immunization with (chickenpox/ cowpox/ monkeypox) will provide protection against smallpox.

 

  1. Painful, blister-like lesions that progressively become filled with pus suggest infection with a (herpesvirus/ poxvirus).
  2. Human herpesvirus (1/ 2/ 3/ 4) is usually associated with lesions on the genitalia.

 

  1. Skin lesions described as "dewdrops on rose petals" are characteristic of (chickenpox/ shingles).

 

  1. Individuals who have had chickenpox may develop (cancer/ shingles/ whitlow) later in life if they experience severe stress or immune suppression.

 

  1. Papillomaviruses are transmitted by (aerosols/ direct contact/ secretions).

 

  1. In infections with human herpesvirus (1/ 2/3 / 4) the virus becomes latent in B lymphocytes and suppresses apoptosis, thus providing one source of lymphomas associated with this virus.

 

 

Chapter 22

 

  1. Neisseria gonaorrhoeae infection in men is

 

  1. Which of the following statements about Neisseria gonorrhoeae is FALSE?

 

  1. Among the areas of the female genital tract which of the following is NOT colonized by Neisseria gonorrhoeae?

 

 

  1. Which of the following statements regarding Neisseria meningitidis is FALSE?

 

  1. Which of the following pairs is MISMATCHED?

 

 

  1. Bordetella pertussis causes disease by

 

  1. Resistance of Pseudomonas to a wide range of antibacterial agents is partly due to its

 

 

 

 

  1. Infection with ______ usually produces acute upper respiratory disease but may cause meningitis in infants 3-18 months old.
  2. Undiagnosed or untreated infections with Neisseria gonorrhoeae in can progress to

 

  1. Neisseria is distinguished from many other Gram-negative pathogens by being (catalase/ oxidase/ dismutase) positive.

 

  1. Because of the existence of (acute/ symptomatic/ asymptomatic) carriers, the eradication of meningococcal disease is unlikely.

 

  1. Pseudomonas aeruginoas is an opportunistic pathogen because it is not (anaerobic/ invasive/ virulent).

 

 

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