Podcast
Questions and Answers
What diseases are associated with Neisseria?
What diseases are associated with Neisseria?
Which characteristic is NOT typical of gonorrhea?
Which characteristic is NOT typical of gonorrhea?
What is the morphology of Neisseria?
What is the morphology of Neisseria?
At what age group is Neisseria meningitidis most commonly affected?
At what age group is Neisseria meningitidis most commonly affected?
Signup and view all the answers
What kind of bacteria are enteric bacteria generally considered?
What kind of bacteria are enteric bacteria generally considered?
Signup and view all the answers
What does the 'O' in E. coli O157:H7 refer to?
What does the 'O' in E. coli O157:H7 refer to?
Signup and view all the answers
Which of the following is a feature of MacConkey agar?
Which of the following is a feature of MacConkey agar?
Signup and view all the answers
Why do coliforms matter in water testing?
Why do coliforms matter in water testing?
Signup and view all the answers
Which strain of E. coli is known for producing Shiga-like toxin and is considered the most prevalent pathogenic form?
Which strain of E. coli is known for producing Shiga-like toxin and is considered the most prevalent pathogenic form?
Signup and view all the answers
What is the most common cause of Salmonella infections in humans?
What is the most common cause of Salmonella infections in humans?
Signup and view all the answers
Which organism is associated with Typhoid fever?
Which organism is associated with Typhoid fever?
Signup and view all the answers
What are the symptoms of Shigella infection?
What are the symptoms of Shigella infection?
Signup and view all the answers
Which type of plague has a near 100% fatality rate if untreated?
Which type of plague has a near 100% fatality rate if untreated?
Signup and view all the answers
What disease does Haemophilus influenzae commonly cause in children?
What disease does Haemophilus influenzae commonly cause in children?
Signup and view all the answers
How is pertussis, or whooping cough, primarily transmitted?
How is pertussis, or whooping cough, primarily transmitted?
Signup and view all the answers
What is a unique risk factor associated with Prevotella infections?
What is a unique risk factor associated with Prevotella infections?
Signup and view all the answers
Study Notes
Neisseria Diseases
- Associated with gonorrhea and meningitis
- Gonorrhea:
- Secretes a protease that breaks down IgA
- Survives within neutrophils
- Exhibits antigenic variability
- Opa proteins bind to T cell receptors, preventing activation and immunological memory
- Meningitis:
- Normal microbiota of the upper respiratory tract
- Morphology: diplococcus
Gonorrhea Transmission, Treatment, and Infant Effects
- Transmission: sexual encounters
- Treatment: complicated by resistant strains; broad-spectrum intramuscular cephalosporins are used
- Infant effects: ophthalmia neonatorum (infant blindness) from gonorrheal eye infection
Neisseria Meningitidis
- Affects individuals under 20 years old
- Prevention: vaccination against serogroups A, C, Y, and W (not B due to similarities with neurons)
Gram-Negative Hospital Acquired Infections
- Top 3 causes in the US: Escherichia, Proteus, and Pseudomonas
- Most of these are opportunistic pathogens, rather than true pathogens.
- Enteric bacteria (such as E. coli) are common gram-negative pathogens in humans, and are usually opportunistic.
Identifying Pathogens (e.g., E. coli)
- O polysaccharide and H antigen are identified through O157:H7 strains (testing)
Virulence Factors
- Common factors like capsules, fimbrae, adhesins, exotoxins, siderophores, hemolysins, and type III secretion systems help pathogens infect host cells.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Related Documents
Description
Test your knowledge on the diseases caused by Neisseria, focusing on gonorrhea and meningitis. This quiz covers transmission, treatment, and the implications for infants. Additionally, explore the role of Gram-negative bacteria in hospital-acquired infections.
