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Microbiology

Introduction to Microbiology and Immunology

12 topics with brief reviews: definitions, key facts, and seminar questions.

This section is the foundation without which it is impossible to understand the nature of infectious diseases. Here, we analyze medical microbiology as a science and its direct clinical relevance in modern medical practice.

A significant portion of the materials is dedicated to the history of microbiology: from the physiological and immunological periods to the modern molecular-genetic era. We will trace how viruses were discovered, how infections evolved, and what contribution Russian microbiology made to science. Pay attention to the periodization—this is a classic question asked by professors during initial seminars and credits.

In addition, the section lays the foundations of immunology and reveals a key concept: the pathogenicity of microorganisms. Understanding how a microbe becomes an aggressor and how the body builds its defense will serve as a reliable basis for studying systematic microbiology and infectious disease clinics.

Section Topics

Frequently asked questions for this section

Who first coined the term "microbes" and when?

This term was proposed by the French scientist Charles-Emmanuel Sedillot in the late 19th century to encompass bacteria, fungi, protozoa, and viruses.

What are saprophytes and are they dangerous to humans?

Saprophytes are non-pathogenic microorganisms whose name translates as "rotten plant." They are entirely incapable of causing human disease.

What is the main difference between general and systematic microbiology?

General microbiology studies the fundamental properties common to all microbes (genetics, morphology, physiology). Systematic microbiology investigates specific groups of pathogens: bacteria, viruses, fungi, and protozoa.

What belongs to the humoral factors of immunity?

Humoral factors include protective substances dissolved in the body's internal fluids: antibodies, the complement system, and interferons.

What is the essence of Fracastoro's hypothesis?

Girolamo Fracastoro suggested that diseases are caused by invisible living entities ("living contagions") transmitted through objects and air.

Who discovered viruses and when?

The Russian botanist D.I. Ivanovsky in 1892 while studying the causative agent of tobacco mosaic disease.

Study the full topic in the «Microbiology» course

This is a summary. The course covers everything tested in classes and exams.

  • 4,383 pages of study guides across all topics
  • Assignments and quizzes after every topic — just like in a colloquium
  • AI tutor answers questions on the topic anytime
  • 141 video lectures on the subject
All Microbiology Topics