NEET MDS Microbiology Syllabus

Microbiology syllabus — full chapter and topic list

Expand any chapter to see its topics and sub-topics. This is the whole examinable outline for Microbiology in NEET MDS, not a summary of it.

1. 1

   Introduction to Microbiology

   3 topics

   • History of Microbiology
     • Early Discoveries
     • Golden Age of Microbiology
     • Modern Microbiology
   • Classification of Microorganisms
     • Bacteria
     • Viruses
     • Fungi
     • Protozoa
     • Algae
   • Microscopy
     • Light Microscopy
     • Electron Microscopy
     • Fluorescence Microscopy
2. 2

   Bacteriology

   4 topics

   • Bacterial Structure
     • Cell Wall
     • Cell Membrane
     • Cytoplasm
     • Flagella
     • Pili
     • Spores
   • Bacterial Physiology
     • Growth and Reproduction
     • Metabolism
     • Genetic Exchange
   • Pathogenic Bacteria
     • Gram-Positive Bacteria
     • Gram-Negative Bacteria
     • Mycobacteria
     • Spirochetes
   • Bacterial Infections
     • Respiratory Infections
     • Gastrointestinal Infections
     • Skin and Soft Tissue Infections
     • Systemic Infections
3. 3

   Virology

   4 topics

   • Virus Structure
     • Capsid
     • Envelope
     • Genome
   • Virus Replication
     • Attachment and Entry
     • Genome Replication
     • Assembly and Release
   • Pathogenic Viruses
     • DNA Viruses
     • RNA Viruses
     • Retroviruses
   • Viral Infections
     • Respiratory Infections
     • Gastrointestinal Infections
     • Neurological Infections
     • Systemic Infections
4. 4

   Mycology

   4 topics

   • Fungal Structure
     • Cell Wall
     • Cell Membrane
     • Hyphae
     • Spores
   • Fungal Physiology
     • Growth and Reproduction
     • Metabolism
   • Pathogenic Fungi
     • Yeasts
     • Molds
     • Dimorphic Fungi
   • Fungal Infections
     • Superficial Mycoses
     • Cutaneous Mycoses
     • Subcutaneous Mycoses
     • Systemic Mycoses
5. 5

   Parasitology

   4 topics

   • Protozoa
     • Amoebae
     • Flagellates
     • Ciliates
     • Sporozoa
   • Helminths
     • Nematodes
     • Trematodes
     • Cestodes
   • Ectoparasites
     • Lice
     • Mites
     • Fleas
     • Ticks
   • Parasitic Infections
     • Intestinal Infections
     • Blood and Tissue Infections
     • Vector-Borne Infections
6. 6

   Immunology

   4 topics

   • Innate Immunity
     • Physical Barriers
     • Cellular Defenses
     • Inflammation
   • Adaptive Immunity
     • Humoral Immunity
     • Cell-Mediated Immunity
     • Immunological Memory
   • Immune Response to Infections
     • Bacterial Infections
     • Viral Infections
     • Fungal Infections
     • Parasitic Infections
   • Immunopathology
     • Hypersensitivity Reactions
     • Autoimmune Diseases
     • Immunodeficiency Disorders
7. 7

   Microbial Genetics

   4 topics

   • Genetic Material
     • DNA Structure
     • RNA Structure
   • Gene Expression
     • Transcription
     • Translation
     • Regulation of Gene Expression
   • Genetic Variation
     • Mutations
     • Horizontal Gene Transfer
   • Genetic Engineering
     • Recombinant DNA Technology
     • CRISPR-Cas9
8. 8

   Antimicrobial Agents

   4 topics

   • Antibiotics
     • Mechanisms of Action
     • Spectrum of Activity
     • Resistance Mechanisms
   • Antiviral Agents
     • Mechanisms of Action
     • Resistance Mechanisms
   • Antifungal Agents
     • Mechanisms of Action
     • Resistance Mechanisms
   • Antiparasitic Agents
     • Mechanisms of Action
     • Resistance Mechanisms
9. 9

   Clinical Microbiology

   4 topics

   • Specimen Collection and Transport
     • Types of Specimens
     • Transport Media
   • Diagnostic Techniques
     • Microscopy
     • Culture Methods
     • Molecular Methods
     • Serological Methods
   • Antimicrobial Susceptibility Testing
     • Disk Diffusion Method
     • Broth Dilution Method
     • E-test
   • Infection Control
     • Sterilization and Disinfection
     • Hospital-Acquired Infections
     • Antibiotic Stewardship

Microbiology flashcards for NEET MDS

24 of 79 cards from the Microbiology deck — real questions with worked answers.

1. Who is regarded as the 'Father of Microbiology' for first observing 'animalcules' (microorganisms) using his single-lens microscopes in the 1670s?

   Antonie van Leeuwenhoek.

2. Which scientist disproved the theory of spontaneous generation using swan-neck flask experiments and developed pasteurization and vaccines for anthrax and rabies?

   Louis Pasteur.

3. State Koch's four postulates used to establish a microbe as the cause of a disease.

   1) The organism is found in all cases of the disease; 2) it can be isolated and grown in pure culture; 3) the cultured organism reproduces the disease when inoculated into a healthy host; 4) it can be re-isolated from that experimentally infected host.

4. Who introduced antiseptic surgery using carbolic acid (phenol), and who discovered penicillin from Penicillium notatum?

   Joseph Lister introduced antiseptic surgery; Alexander Fleming discovered penicillin (1928).

5. On what basis does the three-domain system of classification divide life, and what are the three domains?

   Based largely on ribosomal RNA (rRNA) sequences (Carl Woese); the domains are Bacteria, Archaea, and Eukarya.

6. What is binomial nomenclature and how is a species name written?

   A two-name Latin system (Linnaeus): Genus (capitalized) followed by species (lowercase), both italicized/underlined, e.g., Staphylococcus aureus.

7. Differentiate prokaryotic and eukaryotic cells in terms of nucleus, organelles, and ribosomes.

   Prokaryotes lack a membrane-bound nucleus and membrane-bound organelles and have 70S ribosomes; eukaryotes have a true nucleus, membrane-bound organelles, and 80S ribosomes (with 70S in mitochondria/chloroplasts).

8. How are bacteria classified by shape, with one example of each major form?

   Cocci (spherical, e.g., Staphylococcus), bacilli (rod-shaped, e.g., E. coli), spirilla/spirochaetes (spiral, e.g., Treponema), and vibrios (comma-shaped, e.g., Vibrio cholerae).

9. What is the formula for total magnification of a compound light microscope, and the typical maximum useful magnification?

   Total magnification = objective lens magnification × ocular (eyepiece) magnification; typical maximum useful magnification is about 1000–1500x.

10. What is resolving power (resolution) of a microscope and the approximate limit of a light microscope?

    Resolution is the minimum distance between two points at which they appear separate; the light microscope limit is about 0.2 micrometers (200 nm).

11. How does electron microscopy achieve much higher resolution than light microscopy, and what distinguishes TEM from SEM?

    It uses a beam of electrons (much shorter wavelength) instead of light, giving resolution down to ~0.2 nm. TEM (transmission) passes electrons through thin sections for internal detail; SEM (scanning) scans the surface for 3D surface images.

12. Why is dark-field microscopy preferred for visualizing Treponema pallidum?

    Treponema is too thin to be seen by ordinary light microscopy and does not stain well; dark-field illumination makes the live, motile organism appear bright against a dark background.

13. Compare the cell wall structure of Gram-positive and Gram-negative bacteria.

    Gram-positive bacteria have a thick peptidoglycan layer with teichoic acids and no outer membrane; Gram-negative bacteria have a thin peptidoglycan layer plus an outer membrane containing lipopolysaccharide (LPS).

14. List the four basic steps of the Gram stain and the final colors of Gram-positive vs Gram-negative cells.

    1) Crystal violet (primary stain), 2) Gram's iodine (mordant), 3) alcohol/acetone (decolorizer), 4) safranin (counterstain). Gram-positive appear purple/violet; Gram-negative appear pink/red.

15. What is the function and clinical significance of bacterial endotoxin (LPS)?

    LPS is part of the Gram-negative outer membrane; its lipid A component is the toxic endotoxin that triggers fever, inflammation, and septic shock when released, especially during cell lysis.

16. What are bacterial endospores, which genera form them, and why are they medically important?

    Endospores are dormant, highly resistant survival structures formed by Bacillus and Clostridium; they resist heat, desiccation, and disinfectants, making them difficult to sterilize (require autoclaving).

17. Distinguish bacterial capsule, flagella, and pili in function.

    Capsule: polysaccharide layer that resists phagocytosis (virulence). Flagella: provide motility. Pili/fimbriae: adhesion to surfaces; sex pilus mediates conjugation (DNA transfer).

18. Classify bacteria by oxygen requirement, giving the key feature of each group.

    Obligate aerobes need O2; obligate anaerobes are killed by O2; facultative anaerobes grow with or without O2; microaerophiles need low O2; aerotolerant anaerobes tolerate but don't use O2.

19. Name and describe the phases of the bacterial growth curve.

    Lag phase (adaptation, no division), log/exponential phase (maximal division), stationary phase (growth = death due to nutrient depletion/waste), and death/decline phase (cells die exponentially).

20. Classify bacteria by temperature preference (optimal growth ranges).

    Psychrophiles (cold, optimum ~15°C or below), mesophiles (moderate, ~20–45°C, includes most human pathogens at 37°C), and thermophiles (heat, ~45–80°C).

21. Compare bacterial exotoxins and endotoxins.

    Exotoxins: secreted proteins, often from Gram-positive and Gram-negative bacteria, highly toxic, specific action, heat-labile, antigenic (toxoids possible). Endotoxins: LPS (lipid A) in Gram-negative cell walls, released on lysis, heat-stable, cause generalized fever/shock, poorly antigenic.

22. Which bacterium causes tuberculosis, what staining property does it have, and why?

    Mycobacterium tuberculosis; it is acid-fast (stains with Ziehl-Neelsen) because its cell wall is rich in mycolic acid (waxy lipids) that resist decolorization by acid-alcohol.

23. Name the bacterial agents of cholera, tetanus, and diphtheria.

    Cholera: Vibrio cholerae; tetanus: Clostridium tetani; diphtheria: Corynebacterium diphtheriae.

24. What is the difference between an exogenous and endogenous (opportunistic) bacterial infection?

    Exogenous infections come from sources outside the body (environment, other people/animals); endogenous/opportunistic infections arise from the host's own normal flora, often when immunity is compromised.

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