Podcast
Questions and Answers
What diseases are associated with Neisseria?
What diseases are associated with Neisseria?
- Syphilis and tuberculosis
- Pneumonia and meningitis
- Gonorrhea and meningitis (correct)
- Chlamydia and gonorrhea
Which characteristic is NOT typical of gonorrhea?
Which characteristic is NOT typical of gonorrhea?
- Antigenic variability
- Secretes protease that cleaves IgA
- Causes infant blindness (correct)
- Survives within neutrophils
What is the morphology of Neisseria?
What is the morphology of Neisseria?
- Coccobacillus
- Coccus
- Bacillus
- Diplococcus (correct)
At what age group is Neisseria meningitidis most commonly affected?
At what age group is Neisseria meningitidis most commonly affected?
What kind of bacteria are enteric bacteria generally considered?
What kind of bacteria are enteric bacteria generally considered?
What does the 'O' in E. coli O157:H7 refer to?
What does the 'O' in E. coli O157:H7 refer to?
Which of the following is a feature of MacConkey agar?
Which of the following is a feature of MacConkey agar?
Why do coliforms matter in water testing?
Why do coliforms matter in water testing?
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?
What is the most common cause of Salmonella infections in humans?
What is the most common cause of Salmonella infections in humans?
Which organism is associated with Typhoid fever?
Which organism is associated with Typhoid fever?
What are the symptoms of Shigella infection?
What are the symptoms of Shigella infection?
Which type of plague has a near 100% fatality rate if untreated?
Which type of plague has a near 100% fatality rate if untreated?
What disease does Haemophilus influenzae commonly cause in children?
What disease does Haemophilus influenzae commonly cause in children?
How is pertussis, or whooping cough, primarily transmitted?
How is pertussis, or whooping cough, primarily transmitted?
What is a unique risk factor associated with Prevotella infections?
What is a unique risk factor associated with Prevotella infections?
Flashcards
Neisseria diseases
Neisseria diseases
Diseases caused by Neisseria bacteria, including gonorrhea and meningitis.
Gonorrhea characteristics
Gonorrhea characteristics
Gonorrhea bacteria secrete IgA protease, survive in neutrophils, exhibit antigenic variability, and use Opa proteins to avoid immune response.
Neisseria morphology
Neisseria morphology
Neisseria bacteria are diplococci (pairs of spherical bacteria).
Gonorrhea transmission
Gonorrhea transmission
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Gram-negative hospital infections
Gram-negative hospital infections
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Coliforms
Coliforms
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E. coli O157:H7
E. coli O157:H7
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MacConkey agar function
MacConkey agar function
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E. coli Pathogens
E. coli Pathogens
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Salmonella Symptoms
Salmonella Symptoms
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Typhoid Fever Causative Agent
Typhoid Fever Causative Agent
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Shigella Transmission
Shigella Transmission
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Plague Types
Plague Types
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Plague Vector
Plague Vector
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Whooping Cough Cause
Whooping Cough Cause
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Pseudomonas Pathogenicity
Pseudomonas Pathogenicity
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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.
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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.
