MORPHOLOGICAL AND TINCTORIAL PROPERTIES OF BACTERIA - E. L. Zaitseva - 2015

Introduction

Microbiological examinations occupy a pivotal place in the comprehensive suite of clinical and Laboratory tests used for the Prevention, Diagnosis, and Treatment of infectious diseases. Cell/15.html">Microscopy is an essential component of this diagnostic framework. Modern clinical medicine places high demands on microscopic examinations, requiring both an increased volume of tests and enhanced diagnostic quality.

Due to insufficient data on many microorganisms, contemporary classifications largely fail to reflect their phylogenetic relationships, serving instead as a practical guide to navigate the vast number and Morphological diversity of forms. The morphological characteristics and tinctorial properties of microorganisms are considered core Classification criteria. This tutorial is dedicated to the Methods used for studying them.

The Morphology and cellular Structure of microorganisms—whose dimensions are typically measured in microns (1 μ = 0.001 mm = 10^-3 mm)—are studied using specialized instruments called microscopes, which provide magnifications ranging from hundreds (light microscopes) to tens of thousands (electron microscopes) of times. The first chapter of this textbook describes the most common models of modern microscopes and various microscopic techniques.

To observe microorganisms under a Microscope, it is necessary to properly prepare both the specimen and the stains (Chapters 2–3). Chapter 4 covers native Microscopy Techniques. To reveal specific morphological features (such as cell shape, arrangement, size, motility, spore- and capsule-forming capacity, and intracellular inclusions), quantify microbial populations, check culture purity, and fulfill various other objectives, researchers prepare fixed, stained specimens that can be stored for extended periods. Chapter 5 outlines simple and differential staining methods.

The Appendix features photographs of prominent scientists who made monumental contributions to The Development of microbiology by pioneering various staining techniques, along with summaries of their achievements in medical science.

For independent practice, the manual includes Self-assessment tests and case studies complete with answer keys.