Microbiology Review

Bacterial Cell Structure & Function

The architecture of the prokaryotic cell — from the cell envelope to the nucleoid — and how each structure contributes to survival, virulence, and antibiotic susceptibility.

Gram Staining & Major Bacterial Pathogens

How the Gram stain works, how to read it, and a structured map of the most clinically important Gram-positive and Gram-negative pathogens.

Viral Structure & Replication

How viruses are built (genome + capsid + envelope), the Baltimore classification, and the stages of the viral replication cycle.

Fungal Structure & Classification

Eukaryotic, chitin-walled organisms existing as yeasts, molds, or dimorphic forms — and why antifungal therapy is challenging.

Major Fungal Pathogens & Mycoses

The high-yield fungal pathogens, their classic presentations, and the hosts they threaten.

Protozoan & Helminthic Parasites

Single-celled protozoa and multicellular worms — life cycles, transmission, and disease patterns.

Innate Immunity & Inflammation

The rapid, non-adaptive first line of defense — barriers, phagocytes, complement, and the inflammatory response.

Adaptive Immunity: Lymphocytes & Antibodies

B cells, T cells, antigen presentation, the five immunoglobulin classes, and how memory is built.

Hypersensitivity, Complement & Autoimmunity

The four hypersensitivity reactions, autoimmune diseases, and transplant rejection types.

Cells & Tissues

Cell structure and organelles, the four tissue types, and how they form the body's functional organization.

Organ Systems Overview

A concise survey of the eleven organ systems, their major functions, and homeostatic integration.

Lymphatic & Immune Anatomy

Primary and secondary lymphoid organs, lymph circulation, and the physical basis of immune surveillance.