PLAB 1 Microbiology Most Important Topics 2026
The top 2 PLAB 1 Microbiology chapters (Bacteriology and Immunology) carry about 57 percent of the 15 Microbiology MCQs on the PLAB 1 paper. All 7 chapters PLAB 1 examines are ranked below, with the method stated in full under the table.
Estimated from the official PLAB 1 syllabus weighting.
PLAB 1 Microbiology chapter frequency table
All 7 Microbiology chapters on the PLAB 1 syllabus, heaviest first. The subtopics under each chapter name are the ones it is most often examined on.
| # | Chapter | Est. MCQs | Share of Microbiology | Priority |
|---|---|---|---|---|
| 1 | Bacteriology | 5.5 | 36.9% | Critical |
| 2 | Immunology | 3.0 | 19.9% | Critical |
| 3 | Virology | 2.8 | 18.4% | Important |
| 4 | Infection Control and Sterilisation | 1.3 | 8.4% | Standard |
| 5 | Parasitology | 1.1 | 7.3% | Standard |
| 6 | Mycology | 0.9 | 6.0% | Standard |
| 7 | General Microbiology | 0.5 | 3.1% | Standard |
How this was worked out: No solved paper we hold examines Microbiology, so nothing here is counted from past papers. The 15 Microbiology MCQs on the PLAB 1 paper are spread across the chapters in proportion to how much material each chapter carries in the syllabus. Use it as a study order, not as a prediction, and check the conducting body's own syllabus for the final word.
Top 7 most important Microbiology topics for PLAB 1 2026
Bacteriology
CriticalBacteriology is 36.9 percent of the PLAB 1 Microbiology paper and works out at roughly 5.5 MCQs on the paper.
Immunology
CriticalImmunology is 19.9 percent of the PLAB 1 Microbiology paper and works out at roughly 3.0 MCQs on the paper.
Virology
ImportantVirology is 18.4 percent of the PLAB 1 Microbiology paper and works out at roughly 2.8 MCQs on the paper.
Infection Control and Sterilisation is 8.4 percent of the PLAB 1 Microbiology paper and works out at roughly 1.3 MCQs on the paper.
Parasitology
StandardParasitology is 7.3 percent of the PLAB 1 Microbiology paper and works out at roughly 1.1 MCQs on the paper.
Mycology
StandardMycology is 6.0 percent of the PLAB 1 Microbiology paper and works out at roughly 0.9 MCQs on the paper.
General Microbiology
StandardGeneral Microbiology is 3.1 percent of the PLAB 1 Microbiology paper and works out at roughly 0.5 MCQs on the paper.
Every Microbiology chapter on the PLAB 1 syllabus
452 free Microbiology MCQs across 7 chapters, every answer explained.
PLAB 1 Microbiology most important topics: frequently asked questions
What are the most important Microbiology topics for PLAB 1 2026?
The highest-value PLAB 1 Microbiology chapters are Bacteriology (about 5.5 MCQs), Immunology (about 3.0 MCQs), Virology (about 2.8 MCQs), Infection Control and Sterilisation (about 1.3 MCQs) and Parasitology (about 1.1 MCQs). Together they account for 91 percent of the 15 Microbiology MCQs on the PLAB 1 paper. The ranking is derived rather than counted from PLAB 1 papers; the method is stated in full on this page.
How many Microbiology MCQs are on the PLAB 1 paper?
Microbiology is worth 15 MCQs on the PLAB 1 paper as set by General Medical Council (UK), spread across 7 chapters. This page ranks all 7 of them by how many of those MCQs each chapter is worth.
Are these PLAB 1 Microbiology numbers counted from past papers?
No. No solved paper on TestUstad examines Microbiology, so nothing here is a count. The 15 Microbiology MCQs on the PLAB 1 paper are spread across the chapters in proportion to how much material each chapter carries in the syllabus. Treat it as a sensible study order and confirm against General Medical Council (UK)'s own syllabus.
Should I skip the low-priority Microbiology chapters for PLAB 1?
No. Every chapter in this table appears on the PLAB 1 paper, and PLAB 1 is decided by a handful of marks. A chapter marked Standard still costs you the marks you drop on it. Use this ranking to decide the order you study in and how long you spend on each chapter, not to cut chapters out.
Where can I practise these PLAB 1 Microbiology chapters?
Every chapter on this page links to its own free Microbiology MCQs on TestUstad, 452 questions across the 7 chapters PLAB 1 examines. Practice is free and unlimited with no account, and every question carries a written explanation of why the correct option is correct.