VPRP096 Introduction to Pathogenic Bacteria in Microbiology
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Questions and Answers

Which type of pathogen must infect a host and cause disease in order to multiply and be transmitted to another host?

  • Opportunistic pathogen
  • Extracellular pathogen
  • Facultative pathogen
  • Obligate pathogen (correct)
  • Which type of pathogen can infect and multiply in hosts but is also capable of multiplying in the environment?

  • Opportunistic pathogen
  • Facultative pathogen (correct)
  • Obligate pathogen
  • Intracellular pathogen
  • Under what conditions does an opportunistic pathogen typically cause disease?

  • When it always infects a host
  • When it reproduces outside the host cell
  • When it requires specialized virulence genes
  • When the host's immune system is impaired (correct)
  • Which type of pathogen can only reproduce inside the infected host cell?

    <p>Obligate intracellular pathogen</p> Signup and view all the answers

    Which group of pathogens includes Rickettsia, Ehrlichia, Mycoplasma, and Chlamydia that can survive and multiply extracellularly in the periphery of host cells?

    <p>Extracellular pathogens</p> Signup and view all the answers

    Which of the following bacteria is considered an opportunistic pathogen?

    <p>Klebsiella pneumoniae</p> Signup and view all the answers

    Which Salmonella serotype is known to infect the ovaries of chickens and can be isolated from eggs?

    <p>Salmonella Enteritidis</p> Signup and view all the answers

    Which of these bacteria is considered a facultative pathogen, meaning it can cause disease in both healthy and immunocompromised hosts?

    <p>Escherichia coli</p> Signup and view all the answers

    Which Salmonella serotype is known to cause a wide range of diseases in cattle, including septicemia, abortion, and osteomyelitis?

    <p>Salmonella Dublin</p> Signup and view all the answers

    Which of the following bacteria is considered an facultative intracellular pathogen?

    <p>Brucella spp.</p> Signup and view all the answers

    Which of the following bacteria is considered an obligate pathogen?

    <p>Bacillus anthracis</p> Signup and view all the answers

    Which of these bacteria is considered a facultative intracellular pathogen?

    <p>Corynebacterium pseudotuberculosis</p> Signup and view all the answers

    Which of these bacteria is considered an obligate anaerobe and powerful toxin producers?

    <p>Clostridium</p> Signup and view all the answers

    Which of the following is a key virulence factor of Bacillus anthracis?

    <p>All of the above</p> Signup and view all the answers

    Which of these bacteria is primarily associated with causing disease in small ruminants?

    <p>Corynebacterium pseudotuberculosis</p> Signup and view all the answers

    Which of the following are obligate intracellular pathogens?

    <p>Rickettsia, Chlamydia, Ehrlichia, Mycoplasma</p> Signup and view all the answers

    Which of the following groups contains only facultative pathogens?

    <p>Staphylococcus, Streptococcus, Enterococcus, Listeria</p> Signup and view all the answers

    Which of the following is an opportunistic pathogen?

    <p>Staphylococcus aureus</p> Signup and view all the answers

    Which of the following pathogens are commonly associated with pyogenic (pus-forming) infections?

    <p>Staphylococcus aureus, Streptococcus pyogenes</p> Signup and view all the answers

    Which type of pathogen is Leptospira, the causative agent of leptospirosis?

    <p>Facultative pathogen</p> Signup and view all the answers

    Which of the following is a common mode of transmission for the pathogens mentioned in the text?

    <p>Vector-borne (ticks)</p> Signup and view all the answers

    Which pathogen mentioned in the text is known to cause reproductive failure, abortions, and stillbirths in livestock?

    <p>Leptospira</p> Signup and view all the answers

    What characteristic of Mycoplasma species makes them resistant to certain antibiotics?

    <p>They lack a cell wall</p> Signup and view all the answers

    Which of the following pathogens is known to cause systemic diseases in both humans and animals in defined geographical regions?

    <p>Rickettsia and Ehrlichia</p> Signup and view all the answers

    Which of the following bacteria is an obligate pathogen?

    <p>Clostridium tetani</p> Signup and view all the answers

    Which of the following bacteria is a facultative pathogen?

    <p>Escherichia coli</p> Signup and view all the answers

    Which of the following bacteria is also an important pathogen for Enterbacterales?

    <p>Yersinia spp.</p> Signup and view all the answers

    Which of the following is an important pathogen belonging to the Enterobacterales group?

    <p>Salmonella serotypes</p> Signup and view all the answers

    Which of the following statements about the bacteria mentioned in the passage is correct?

    <p>Clostridium botulinum causes flaccid paralysis by ingestion of pre-formed neurotoxin.</p> Signup and view all the answers

    Which of the following best describes Listeria monocytogenes in terms of pathogenicity?

    <p>A facultative intracellular bacterium that can persist in macrophages</p> Signup and view all the answers

    In what way does Listeria monocytogenes use actin filaments?

    <p>To travel through cells</p> Signup and view all the answers

    Which clinical symptom is NOT typically associated with listeriosis caused by Listeria monocytogenes?

    <p>Meningitis</p> Signup and view all the answers

    What type of pathogen is Listeria monocytogenes based on its pathogenic characteristics?

    <p>Facultative pathogen</p> Signup and view all the answers

    Which animal is most susceptible to encephalitis caused by Listeria monocytogenes?

    <p>Cattle</p> Signup and view all the answers

    During which seasons is listeriosis more likely to occur among feedlot or housed ruminants?

    <p>Winter-Spring</p> Signup and view all the answers

    'Circulation of Listeria in the environment' refers to which bacterial species?

    <p>Listeria monocytogenes</p> Signup and view all the answers

    'Circling disease' and 'silage disease' are conditions primarily affecting which animals?

    <p>Cattle and small ruminants</p> Signup and view all the answers

    In which of these species is Erysipelothrix rhusiopathiae widely found as a reservoir?

    <p>Pigs</p> Signup and view all the answers

    What type of paralysis is typically caused by Clostridium tetani?

    <p>Spastic paralysis</p> Signup and view all the answers

    In which environment is Clostridium botulinum commonly found as a reservoir?

    <p>Soil</p> Signup and view all the answers

    Which of the following bacteria is an opportunistic pathogen commonly found in the GI tract?

    <p>Escherichia coli</p> Signup and view all the answers

    Which type of bacteria stains pink in a Gram stain?

    <p>A and D</p> Signup and view all the answers

    Which of the following bacteria is an obligate intracellular pathogen?

    <p>Rickettsia</p> Signup and view all the answers

    Which bacterium is commonly found as a commensal on the skin and mucus membranes of animals and humans?

    <p>Staphylococcus</p> Signup and view all the answers

    Which bacterium is known to cause pyogenic infections with pus-filled lesions like abscesses?

    <p>Streptococcus</p> Signup and view all the answers

    Which of the following pathogens is a Gram-negative spirochete?

    <p>Leptospira</p> Signup and view all the answers

    Which of the following pathogens is known to cause reproductive failure, abortions, and stillbirths in livestock?

    <p>Leptospira</p> Signup and view all the answers

    Which of the following pathogens is an obligate intracellular bacterium?

    <p>Rickettsiales</p> Signup and view all the answers

    Which of the following pathogens is known to be transmitted through ticks?

    <p>Rickettsiales</p> Signup and view all the answers

    Which of the following pathogens is known to cause zoonotic diseases that can affect both animals and humans?

    <p>Both A and B</p> Signup and view all the answers

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