Podcast
Questions and Answers
Which of the following is NOT an example of symbiosis?
Which of the following is NOT an example of symbiosis?
- Microbe passing across the placenta to the fetus (correct)
- Bacteria in the human colon
- Tapeworm in the human intestine
- Tuberculosis in the human lung
- Protozoan in termites
Mutualism is a relationship...
Mutualism is a relationship...
- That sometimes provides benefits for both members such that one or both parties cannot live without the other (correct)
- Where one member of the relationship may kill the other
- Where it's difficult to prove the benefits or disadvantages one member of the relationship may provide for the other
- Where only one member derives benefit from the other
- Where one member of the relationship benefits without hurting the other
The relationship between the fungus and the bacteria in a Petri dish would be best described as...
The relationship between the fungus and the bacteria in a Petri dish would be best described as...
- Commensalism
- Parasitic
- None, there is no relationship between the microbes
- Synergistic
- Amensal (correct)
The fungus Pneumocystis is best described as...
The fungus Pneumocystis is best described as...
Chagas' disease is transmitted by a guy with mouthparts that penetrate blood vessels. Which type of exposure does this represent?
Chagas' disease is transmitted by a guy with mouthparts that penetrate blood vessels. Which type of exposure does this represent?
The close contact between newborns and family members allow them to become ________ with microbes that become established as their own microbiota.
The close contact between newborns and family members allow them to become ________ with microbes that become established as their own microbiota.
In which of the following do the mucous membranes serve as a portal of entry for disease?
In which of the following do the mucous membranes serve as a portal of entry for disease?
Which of the following statements regarding the demonstration of the etiology of disease is false?
Which of the following statements regarding the demonstration of the etiology of disease is false?
Which of the following situations might cause normal microbiota to become opportunistic pathogens?
Which of the following situations might cause normal microbiota to become opportunistic pathogens?
Which of the following is considered part of the indigenous microbiota of the female reproductive system?
Which of the following is considered part of the indigenous microbiota of the female reproductive system?
Which of the following is an example of an exotoxin?
Which of the following is an example of an exotoxin?
Among the virulence factors produced by Staphylococcus aureus, which of these factors contributes to its ability to invade the body?
Among the virulence factors produced by Staphylococcus aureus, which of these factors contributes to its ability to invade the body?
Which of the following stages of an infectious disease is the most severe?
Which of the following stages of an infectious disease is the most severe?
Study Notes
Symbiosis and Microbial Relationships
- Symbiosis includes relationships such as mutualism, commensalism, and parasitism; NOT all interactions are symbiotic.
- Mutualism benefits both partners and can be essential for survival.
- Amensalism occurs when one organism is inhibited or destroyed while the other remains unaffected.
Microbial Presence in Humans
- Pneumocystis fungus is a resident microbiota but can act as an opportunistic pathogen, especially in immunocompromised individuals.
- Newborns become colonized with microbes through close contact with family, establishing their microbiota.
Routes of Disease Transmission
- Chagas' disease is an example of transmission via the parenteral route, where the pathogen penetrates blood vessels.
- Mucous membranes can serve as entry points for pathogens, as seen when contaminants from fingers wash into the nasal cavity.
Etiology of Disease
- Establishing disease causation involves four criteria: presence of the agent in all cases, ability to cause disease in a host, isolation and culturing it, and re-isolation from the infected host.
- It is false that the suspect agent must be the only pathogen present in disease cases.
Normal Microbiota and Pathogenicity
- Normal microbiota can become opportunistic pathogens under certain conditions, such as immunosuppression from cancer treatment.
- Indigenous microbiota of the female reproductive system includes both Candida and lactobacillus, essential for maintaining health.
Toxins and Virulence Factors
- Exotoxins include neurotoxins which are potent biological toxins released by bacteria.
- Staphylococcus aureus utilizes hyaluronidase as a virulence factor to invade the body, amongst other factors.
Stages of Infectious Disease
- The illness period is the most severe stage of infectious disease, characterized by pronounced symptoms and effects on the body.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Test your knowledge on symbiosis and mutualism with these flashcards from Microbiology Chapter 14. Each card presents key concepts and definitions to help reinforce your understanding of microbial relationships. Ideal for students preparing for exams or anyone looking to deepen their microbiology knowledge.
