Podcast
Questions and Answers
What is the primary cause of gonorrhea-related infertility in women?
What is the primary cause of gonorrhea-related infertility in women?
- Transmissible infection from animals
- Inflammation and scarring of the reproductive tract (correct)
- Ophthalmia neonatorum
- Chronic inflammation of the bladder
Which of the following statements about Neisseria meningitidis is true?
Which of the following statements about Neisseria meningitidis is true?
- Vaccination protects against serogroup B only.
- It can be transmitted through contaminated food.
- It is a common cause of meningitis in individuals over 20 years old.
- It exists in normal microbiota of the upper respiratory tract. (correct)
Which of the following treatments is commonly used for Neisseria meningitidis infection?
Which of the following treatments is commonly used for Neisseria meningitidis infection?
- Vaccine administration
- Intravenous penicillin (correct)
- Antimicrobials for eye infections
- Oral antibiotics
What is a significant challenge in treating Neisseria gonorrhoeae infections?
What is a significant challenge in treating Neisseria gonorrhoeae infections?
What unique characteristic is associated with Enterobacteriaceae?
What unique characteristic is associated with Enterobacteriaceae?
What is the most common disease associated with coliform opportunistic Enterobacteriaceae?
What is the most common disease associated with coliform opportunistic Enterobacteriaceae?
Which bacteria are almost always pathogenic due to their numerous virulence factors?
Which bacteria are almost always pathogenic due to their numerous virulence factors?
Which statement about E. coli O157:H7 is accurate?
Which statement about E. coli O157:H7 is accurate?
What is a common cause of meningitis prior to vaccination?
What is a common cause of meningitis prior to vaccination?
What is a characteristic symptom of whooping cough caused by Bordetella?
What is a characteristic symptom of whooping cough caused by Bordetella?
Which of the following bacteria can colonize almost any organ, particularly in immunocompromised patients?
Which of the following bacteria can colonize almost any organ, particularly in immunocompromised patients?
What is the primary transmission route for human infections caused by Salmonella?
What is the primary transmission route for human infections caused by Salmonella?
What type of environment is Pseudomonas aeruginosa commonly found?
What type of environment is Pseudomonas aeruginosa commonly found?
Flashcards
Gram-negative bacteria
Gram-negative bacteria
Bacteria with a cell wall containing a lipid A layer that can cause endotoxic shock.
Neisseria gonorrhoeae
Neisseria gonorrhoeae
A bacterium that causes gonorrhea, a sexually transmitted infection.
Ophthalmia neonatorum
Ophthalmia neonatorum
A serious eye infection in newborns.
Neisseria meningitidis
Neisseria meningitidis
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Enterobacteriaceae
Enterobacteriaceae
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Enteric bacteria
Enteric bacteria
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Coliform bacteria
Coliform bacteria
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E. coli O157:H7
E. coli O157:H7
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Salmonella
Salmonella
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Shigella
Shigella
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Yersinia
Yersinia
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Pasteurellaceae
Pasteurellaceae
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Haemophilus influenzae
Haemophilus influenzae
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Bordetella pertussis
Bordetella pertussis
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Pseudomonas aeruginosa
Pseudomonas aeruginosa
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Prevotella
Prevotella
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Meningitis
Meningitis
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Gonorrhea
Gonorrhea
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Disseminated intravascular coagulation
Disseminated intravascular coagulation
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Opportunistic pathogens
Opportunistic pathogens
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Study Notes
Gram-Negative Bacteria
- Lipid A in the bacterial cell wall can lead to disseminated intravascular coagulation and potential endotoxic shock.
Neisseria
- Neisseria gonorrhoeae and Neisseria meningitidis are important pathogens.
- Neisseria gonorrhoeae only infects humans and can evade the immune system.
- It causes ophthalmia neonatorum, a serious eye infection in newborns.
- Gonorrhea can lead to sterility in women and is difficult to treat due to resistance.
- Neisseria meningitidis is a common cause of meningitis in individuals under 20 years old.
- It can cause death within 6 hours of symptoms and is spread through respiratory droplets.
- Vaccination protects against some serogroups but not serogroup B.
Enterobacteriaceae
- Enteric bacteria are the most common gram-negative pathogens in humans, often opportunistic.
- They are ubiquitous and commonly found in the environment.
- They can be identified using O antigen and H antigen on the surface.
- Enterobacteriaceae are distinguished by their ability to reduce nitrate to nitrite and ferment glucose.
- They are typically diagnosed by finding enteric bacteria in urine, blood, and cerebrospinal fluid.
- Coliform opportunistic enterobacteriaceae are indicator organisms, used to assess water quality.
- They can cause gastroenteritis.
- E. coli O157:H7 is a prevalent pathogenic strain that produces Shiga-like toxin.
- Truly pathogenic Enterobacteriaceae include Salmonella, Shigella, and Yersinia, which often cause human infections through contaminated food.
- Salmonella causes typhoid fever, while Shigella causes dysentery.
- Yersinia is responsible for bubonic and pneumonic plague.
Pasteurellaceae
- Pasteurellaceae are oxidase positive.
- Haemophilus influenzae is a common cause of meningitis in young children.
- Bordetella pertussis causes whooping cough, characterized by violent coughing and gasping for air.
Pseudomonas
- Pseudomonas aeruginosa is an opportunistic pathogen that can cause infections in immunocompromised individuals.
- It is ubiquitous in the environment and forms biofilms for protection.
Prevotella
- Prevotella is associated with a healthy diet rich in plant-based foods.
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Description
This quiz covers essential information about gram-negative bacteria, specifically focusing on important pathogens like Neisseria gonorrhoeae and Neisseria meningitidis. Learn about their mechanisms of infection, complications, and identification techniques. Perfect for students studying microbiology and infectious diseases.
