VPRP096 Introduction to Pathogenic Bacteria in Microbiology

Play an AI-generated podcast conversation about this lesson

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?

Obligate intracellular pathogen (B) 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?

Extracellular pathogens (B) Signup and view all the answers

Which of the following bacteria is considered an opportunistic pathogen?

Klebsiella pneumoniae (B) Signup and view all the answers

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

Salmonella Enteritidis (B) 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?

Escherichia coli (C) 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?

Salmonella Dublin (A) Signup and view all the answers

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

Brucella spp. (A) Signup and view all the answers

Which of the following bacteria is considered an obligate pathogen?

Bacillus anthracis (D) Signup and view all the answers

Which of these bacteria is considered a facultative intracellular pathogen?

Corynebacterium pseudotuberculosis (B) Signup and view all the answers

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

Clostridium (D) Signup and view all the answers

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

All of the above (D) Signup and view all the answers

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

Corynebacterium pseudotuberculosis (A) Signup and view all the answers

Which of the following are obligate intracellular pathogens?

Rickettsia, Chlamydia, Ehrlichia, Mycoplasma (A) Signup and view all the answers

Which of the following groups contains only facultative pathogens?

Staphylococcus, Streptococcus, Enterococcus, Listeria (D) Signup and view all the answers

Which of the following is an opportunistic pathogen?

Staphylococcus aureus (A) Signup and view all the answers

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

Staphylococcus aureus, Streptococcus pyogenes (C) Signup and view all the answers

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

Facultative pathogen (C) Signup and view all the answers

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

Vector-borne (ticks) (C) Signup and view all the answers

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

Leptospira (C) Signup and view all the answers

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

They lack a cell wall (C) 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?

Rickettsia and Ehrlichia (A) Signup and view all the answers

Which of the following bacteria is an obligate pathogen?

Clostridium tetani (B) Signup and view all the answers

Which of the following bacteria is a facultative pathogen?

Escherichia coli (D) Signup and view all the answers

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

Yersinia spp. (D) Signup and view all the answers

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

Salmonella serotypes (A) Signup and view all the answers

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

Clostridium botulinum causes flaccid paralysis by ingestion of pre-formed neurotoxin. (C) Signup and view all the answers

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

A facultative intracellular bacterium that can persist in macrophages (C) Signup and view all the answers

In what way does Listeria monocytogenes use actin filaments?

To travel through cells (C) Signup and view all the answers

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

Meningitis (D) Signup and view all the answers

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

Facultative pathogen (A) Signup and view all the answers

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

Cattle (C) Signup and view all the answers

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

Winter-Spring (B) Signup and view all the answers

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

Listeria monocytogenes (D) Signup and view all the answers

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

Cattle and small ruminants (B) Signup and view all the answers

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

Pigs (C) Signup and view all the answers

What type of paralysis is typically caused by Clostridium tetani?

Spastic paralysis (A) Signup and view all the answers

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

Soil (D) Signup and view all the answers

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

Escherichia coli (D) Signup and view all the answers

Which type of bacteria stains pink in a Gram stain?

A and D (C) Signup and view all the answers

Which of the following bacteria is an obligate intracellular pathogen?

Rickettsia (A) Signup and view all the answers

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

Staphylococcus (A) Signup and view all the answers

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

Streptococcus (C) Signup and view all the answers

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

Leptospira (C) Signup and view all the answers

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

Leptospira (B) Signup and view all the answers

Which of the following pathogens is an obligate intracellular bacterium?

Rickettsiales (C) Signup and view all the answers

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

Rickettsiales (A) Signup and view all the answers

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

Both A and B (C) Signup and view all the answers

Obligate Pathogen

Must infect a host to multiply and transmit.

Facultative Pathogen

Can infect hosts and multiply in the environment.