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Understanding Neisseria and Moraxella: Characteristics, Pathogenesis, and Clinical Management

Understanding Neisseria And Moraxella: Characteristics, Pathogenesis, And Clinical Management

Explore the characteristics and clinical implications of Micro-neisseria and Moraxella in this focused educational content. This assessment delves into their pathogenic roles, aiding in understanding infections they cause, which...

Questions: 8 | Attempts: 10 | Last updated: Aug 4, 2025

Sample Question 1
What are the key microbiological characteristics of Neisseria and Moraxella?

-aerobic, Gram (-), diplococci -non-pigmented, non hemolytic colonies on Chocolate agar -divided into serogroups based on capsular polysaccharide and serotypes based on outer membrane proteins -Moraxella indistinguishable from Neisseria via Gram stain

-anaerobic, Gram (+), cocci

-pigmented, hemolytic colonies on MacConkey agar

-divided into genus based on cell wall structure

Sample Question 2
Which of the following statements best describes the epidemiology and pathogenesis of Neisseria meningitidis?

Primarily affects elderly population in tropical regions

-epidemics, "meningitis belt" of Africa in spring and winter -a leading cause of bacterial meningitis, esp. due to serogroup B in the US -capsular polysaccharide (avoids phagocytosis), pili (adhesion to host's pharynx tissue), outer membrane LPS and blebs (tissue damage) -INC risk among pts w/ deficiencies in C5-C8

Caused by a virus and not bacteria

No specific risk factors associated with infection

What Do You Know About Mycobacterium? Trivia Quiz

What Do You Know About Mycobacterium? These pathogens are to blame when it comes to some of the serious diseases that affect mammals. Do you know enough about these classes of bacteria to pass this special quiz? The best way to...

Questions: 5 | Attempts: 211 | Last updated: Mar 20, 2023

Sample Question 1
Which of the following skin manifestations of tuberculosis infection is a tuberculid?

Erythema induratum of Bazin

Lupus vulgaris

Miliary TB

Scrofuloderma

Tuberculous gumma

Sample Question 2
Which of the following statements best describes the pathogenesis of scrofuloderma?

Hematogenous spread of M. tuberculosis from a distant site of infection

Autoinoculation of M. tuberculosis from advanced pulmonary tuberculosis

Contiguous spread from an underlying focus of tuberculous lymphadenitis

Primary incoculation of M. tuberculosis in a sensitized host

An cutaneous manifestation of military tuberculosis

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