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SBCP: Microbiology Test Questions Solved 100% Correct

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Causes of bacterial diarrhoea - Answer Campylobacter (assoc. with Guillain Barre) Salmonella Shigella E.coli Vibrio cholera Toxic ingesting bacteria - Answer Clostridium perfringens (Gravies) Bacillus cereus (reheated rice) S.aureus Clostridium Botulinum

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  • August 5, 2024
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  • 2024/2025
  • Exam (elaborations)
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SBCP: Microbiology Test Questions Solved
100% Correct

Causes of bacterial diarrhoea - Answer Campylobacter (assoc. with Guillain Barre)
Salmonella
Shigella
E.coli
Vibrio cholera


Toxic ingesting bacteria - Answer Clostridium perfringens (Gravies)
Bacillus cereus (reheated rice)
S.aureus
Clostridium Botulinum


Antibiotic associated diarrhoea - Answer Clostridium difficile


C.difficile infection - Answer Gram +ve - sporing anaerobic rod
Antibiotic associated colitis
Pseudomembranous colitis - appear as yellow whitish plaques on colonoscopy


Tx: Metronidazole & Vancomycin - stop other unnecessary abx


Shigella - Answer dysentery - gram negative rods, non lactose fermenters

,Haemolytic uraemic syndrome - Answer - Complication of E.coli (enterohaemorrhagic)
(0157) infection - mostly seen in children
Renal failure
Haemolytic anaemia
Thrombocytopaenia (low platelets)


Salmonella complications - Answer Reactive arthritis (Reiter syndrome; Can't see, Can't
pee, Can't climb a tree - Conjunctivitis, Non-gonococcal urethritis, Arthritis)


Cholera - Answer Toxin causes secretion of fluid and electrolytes - rice water diarrhoea
(no blood, pus or mucous)


Primary immunodeficiency (Causes) - Answer Neutrophil defects - Chronic
granulomatous disease
Humoral - B cell defects
Cell mediated - T cell defects (AIDs)
Severe combined immunodeficiency (SCID)


Causes of secondary immunodeficiency - Answer AIDs
Hyposplenism
Cancer
Diabetes
Any severe systemic illness


Stressed physiological states - Answer Pregnancy
Neonates (pre-term)
Elderly

, Nutritionally deficient


Iatrogenic immunodeficiency - Answer Drugs - Corticosteroids, Anti-cancer
chemotherapy (leucopaenia, mucositis), immunosuppressive therapy post-transplant
Irradiation
Invasive devices e.g. IV lines
Surgical procedures - Splenectomy


Pneumocystis Carinii - Answer Presentation: Dry cough, SOB, Fever


Diagnosis:
Silver stain/monoclonal antibody detection (BAL)
Perihilar infiltrates on CXR


May progress to ARDS


Tx; High dose co-trimoxazole


Cerebral toxoplasmosis - Answer Toxoplasmosis gondii
Can present in healthy or immunocompromised (HIV)


In healthy: Usually asymptomatic, glandular fever like illness - zoonosis (from cats)


In advanced HIV:
Main cause of focal CNS lesions - ring enhancing
Pneumonitis & chorioretinitis also occur

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