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Gram Negative Bacilli - Dream PG

Excerpt

You are likely to get up to 2 questions asked from this chapter.

Micro

Exam Yield

Probability of getting 1 Question from this chapter195%

You are likely to get up to 2 questions asked from this chapter.

Its a vast chapter ( all Gram negative Bacilli), but the questions focus on basic aspects of common organisms.

Hence should be easy 8 marks to score from.

Question Pattern

The questions focus on

  • Knowing the causative organisms for various diseases
  • Characteristic Clinical features & Lab findings
  • Incubation period & DOC

for the following organisms

  • E Coli
  • Salmonella
  • Vibrio
  • Hemophilus
  • Brucella
  • Pertusis

Make sure to read the causative organisms & vectors for Arthropod- borne diseases

Recent Questions

Questions on this chapter from recent NEET and AIIMS examinations have been about

  • Scombroid fish poisoning – Cause
  • Enterohemorrhagic E. coli (EHEC)-induced diarrhea
  • Mechanism of action of various bacterial toxins
  • Legionnaires’ disease – Diagnosis
  • Chemoprophylaxis in contacts of a patient with pneumonic plague
  • Infective dose of Salmonella typhi
  • Brucella species are oxidase positive except
  • Burkholderia cepacia is resistant to
  • Mechanism of action of various bacterial toxins
  • Yersinosis
  • Vibrio parahemolyticus – overview
  • Organisms causing epiglottitis
  • Diseases with usual incubation period
  • Culture media used to differentiate E. coli O157:H7 from other E. coli
  • Organisms produce urease
  • Specific Culture Media for various organisms
  • Features of amoebic and bacillary dysentery
  • MC cause of traveler’s diarrhea
  • Chronic airway infection in cystic fibrosis – organism
  • Brazilian purpuric fever – organism
  • Widal test
  • Characteristic motility of microorganisms
  • Melioidosis – Organism
  • Arthropod- borne diseases – Overview
  • Genital Ulcers – Characteristics of each type
  • Lactose fermenter
  • Kanagawa phenomenon is shown by
  • HACEK group – organisms
  • Differentiation between classical Cholera and El tor Vibrios
  • Bipolar staining or safety pin appearance is shown by
  • Clue cells
  • Pertusis – Incubation period
  • Satellitism

Suggested Revision

Revise the following areas

  • Hemophilus – Microbiological features, clinical syndromes
  • Vibrio Cholrea – Types, Investigations and Microbiological features, Pathogenesis
  • Pseudomonas – Microbiological features
  • Rat bite fever – Organism
  • Plague – Types and common features
  • Salmonella typhi – Overview
  • Transport media for Vibrio cholerae
  • Brucella – Unique features
  • H Pylori – Investigations
  • Non motile salmonellae
  • Diene’s phenomenon
  • E.coli – Microbiological features
  • Pertusis – Salient features
  • Cat scratch disease – Overview
  • Bacteria and Oxygen Requirement
  • Non-typhoidal Salmonellosis – Overview
  • DOC for typhoid carrier
  • Typhoral schedule
  • E. Coli – Types, differentiation and the diseases they cause
  • Pertusis Vaccine
  • Cholera red reaction
  • Bacillary angiomatosis – Overview
  • Burkholderia mallei – Overview