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Lung Pathology – Pneumonia MCQ’sPathogens causing community-acquired atypical pneumonia include:Legionella pneumophilaKlebsiella pneumoniaMycoplasma pneumoniaPseudomonas spp.Which of the following regarding community acquired pneumonia is false?Pneumococcus is the second most common cause of community acquired acute pneumoniaHaemophilus influenza is a pleomorphic, gram negative organismStreptococcus pneumonia is a gram-positive, lancet-shaped diplococcusPseudomonas can cause community acquired pneumonia in cystic fibrosis patientsWhich of the following are incorrectly paired?Lobar pneumonia: 4 stages of inflammatory responseCongestion: Lung heavy and red with few bacteria and many neutrophils Red hepatisation: Red cells, neutrophils and fibrin filling alveolar spacesGrey hepatisation: Persistence of fibrinosuppurative exudateAll the following are true of Legionella pneumophila except:It causes Legionnaires’ diseaseIt causes Pontiac feverIt flourishes in water cooling towersDemonstration of Legionella antigens in urine is the gold standard of diagnosisWhich of the following are true when referring to community-acquired atypical pneumonias?They are largely confined to the alveolar septae and alveolar spaces. Coxiella burnetii causes Q-feverIn immunocompetent individuals the mortality rate is about 10%Haemoptysis and mucopurulent sputum are two of the common featuresCommunity-acquired atypical pneumonia features include: Predominantly interstitial inflammationNormal alveolar septaeFrequently associated pleuritisGray hepatisationWhich of the following are regarding lung abscesses are incorrectly paired?Aspiration of infective material: most common causeNeoplasia: postobstructive pneumoniaSeptic embolism: vegetations on the mitral / aortic valvesNo cause found: primary cryptogenic lung abscessesRegarding chronic pneumonia: Most often a bilateral, diffuse processThe inflammatory reaction is caused by parasitic infestationHistoplasmosis is a granulomatous disease Mycobacterium tuberculosis is a bacterial causeIn pneumonia in the immunocompromised host, which is incorrectly groupedBacterial causes: P. aeruginosa, L. pneumophila, C. neoformansViral causes: CMV, Herpes Fungal causes: P. jiroveci, aspergillus, candidaDiffuse infiltrate: CMV, P. jiroveci, drug reactionWhich of the following do not commonly cause a focal infiltrate in immunocompromised hosts?Gram-negative rodsS. aureusCandidaCMVAnswers: c (pg 711) a (pg 711) b (pg 712) Many bacteria, few neutrophils d (pg 712) Culture is the gold standard (also PCR and sputum antigens for testing) b (pg 714) a (pg 714) c (pg 717) b(pg 717) ??? C and D seem like the correct answers… a (pg 719) d (pg 720) ................
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