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Which agar is best suited for the growth of Neisseria meningitidis?
What is the natural habitat of Neisseria meningitidis?
What is the transmission route of Neisseria meningitidis?
What is the disease caused by hematogenous dissemination of Neisseria meningitidis called?
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Which species of Neisseria are rare opportunistic pathogens?
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What is the differentiation between meningococcus and gonococcus based on?
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Which antigenic structure of enterobacteria is associated with the surface and capsular polysaccharide?
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What type of infections are most commonly produced by Enterobacteriaceae?
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Which strain of Escherichia coli is responsible for traveler's diarrhea and infant diarrhea?
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What are the etiological agents of bacillary dysentery?
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Which species of Salmonella is associated with typhoid fever?
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What is the main symptom of bubonic plague caused by Yersinia pestis?
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How is typhoid fever typically transmitted?
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Which antigenic structure of enterobacteria is associated with the flagella?
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Which type of infections are uncommon in healthy people but can be caused by strict pathogenic strains of Escherichia coli?
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What is the main route of transmission for gastroenteritis?
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Which serogroups of Neisseria meningitidis are the main causes of disease in Spain?
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At what age does meningitis due to Neisseria meningitidis peak in Spain?
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In which months do most cases of meningitis due to Neisseria meningitidis occur in Spain?
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What is the first-line treatment for Neisseria meningitidis bacteremia?
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Which type of vaccine is more efficient and provides a durable response against Neisseria meningitidis serogroup C?
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How is Neisseria gonorrhoeae classified based on its morphology?
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In which type of infections do uterine cervix, urethra, anal portion of the rectum, pharynx, and conjunctiva get affected by Neisseria gonorrhoeae?
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Ecthyma gangrenosum is a typical lesion associated with which infection?
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Pseudomonas aeruginosa is important in nosocomial infections as an opportunistic pathogen due to:
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Pseudomonas aeruginosa is intrinsically resistant to many antibiotics due to:
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Pseudomonas aeruginosa infections can lead to septicemia, which is characterized by:
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Which antibiotic type is most effective against Pseudomonas aeruginosa in severe infections?
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Study Notes
Neisseria meningitidis
- Best growth on chocolate agar, enriched with nutrients.
- Natural habitat includes the nasopharynx of healthy individuals.
- Transmission occurs mainly via respiratory droplets.
- Hematogenous dissemination leads to meningococcemia, a severe condition.
- Rare opportunistic pathogens include Neisseria lactamica and Neisseria sicca.
- Differentiated from gonococcus (Neisseria gonorrhoeae) by serological tests, particularly for capsular antigens.
- Main serogroups causing disease in Spain are A, B, C, W, and Y.
- Meningitis peaks in children aged 6 months to 2 years.
- Most cases occur in winter and early spring.
- First-line treatment for meningococcal bacteremia is intravenous penicillin.
- Meningococcal C conjugate vaccine offers durable immunity.
Enterobacteriaceae
- Surface and capsular polysaccharide structures identified as O antigens.
- Generally associated with gastrointestinal infections, including diarrheal diseases.
- Enterotoxigenic Escherichia coli (ETEC) responsible for traveler's and infant diarrhea.
- Bacillary dysentery caused primarily by Shigella species such as Shigella sonnei and Shigella flexneri.
- Salmonella Typhi is the specific species linked to typhoid fever.
- Bubonic plague symptom includes swollen lymph nodes (buboes).
- Typhoid fever transmitted via contaminated food and water.
- Flagella are identified with H antigens in enterobacteria.
- Strict pathogenic E. coli strains can lead to uncommon infections in healthy individuals, including hemolytic uremic syndrome (HUS).
- Gastroenteritis mainly transmits through ingestion of contaminated food.
Pseudomonas aeruginosa
- Ecthyma gangrenosum lesions are typically associated with Pseudomonas aeruginosa infections.
- Important opportunistic pathogen in nosocomial infections due to its environmental adaptability and virulence factors.
- Intrinsic resistance to multiple antibiotics arises from efflux pumps and protective outer membrane.
- Infections can result in septicemia with rapid onset of fever, chills, and potential organ failure.
- Most effective antibiotic for severe Pseudomonas infections includes piperacillin-tazobactam or cephalosporins.
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Description
Test your knowledge on Gram-negative cocci and rods including Neisseria spp, Pseudomonas aeruginosa, and the Enterobacteriaceae family. This quiz covers the characteristics, species, and pathogenicity of Neisseria genus, particularly Neisseria meningitidis and Neisseria gonorrhoeae.
