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Bacteriology

Bacteriology is a branch or discipline of science that studies different characteristics of bacteria and their association with other organisms or disciplines.

  • Over the years, the discipline of bacteriology has evolved from the microbiological tests performed only by physicians, the application of the germ theory of disease and economic concerns relating to the spoilage of foods and wine to the use of bacteria to simpler forms of laboratory tests and the production of new nutritious food and antibiotics.
  • The study of bacteria began with the discovery of the microscope and was mostly limited to experts and scientists of that time.
  • The initial advances in pathogenic bacteriology began with the identification and characterization of bacteria associated with specific diseases.
  • Nowadays, however, bacteriology is used in various other fields like food, pharmaceuticals, agriculture, and the environment.
  • Significant advances made in bacteriology over the last century have resulted in the development of many useful vaccines like pneumococcal polysaccharide vaccine, diphtheria toxoid as well as antibiotics.
  • At present, most bacterial diseases in humans and their infectious agents have been identified, although significant variants continue to evolve and sometimes emerge.
  • Studies made in bacteriology have also allowed the use of gene recombination technology in bacteria to produce improved bacterial strains that can then be used in various areas.
  • The importance of bacteriology continues to grow throughout the years as many diseases and disorders associated with almost all living beings are caused by bacteria.
  • Studies of non-pathogenic bacteria that exist in a symbiotic relationship with plants and animals are even beneficial to said organisms.
  • The identification and classification of bacteria into different groups have allowed for a convenient way of studying these bacteria and the formation of a separate branch, systemic bacteriology, that deals with taxonomy.
  • Besides, bacteriological studies, subsequently, have also been divided into different areas like soil bacteriology, public-health bacteriology, industrial bacteriology, etc.
  • Bacteriological studies have been the focal point for disease diagnosis and treatment, and their importance continues to grow with the emergence of new bacteria and associated diseases.

Habitat and Morphology of Mycobacterium leprae

September 20, 2022March 13, 2022 by Sagar Aryal, PhD
Habitat and Morphology of Mycobacterium leprae

Habitat of Mycobacterium leprae They are found in soil, water and air. Found in the soils where the leprosy infected people live. Most of them are non-pathogenic and non-parasitic. Found … Read more

Staphylococcus hominis: Morphology, Characteristics, Infections & Identification

September 26, 2026March 9, 2022 by Anupama Sapkota
Staphylococcus hominis

Staphylococcus hominis is a Gram-positive coagulase-negative member of Staphylococci that exists as a commensal on the human body, especially in the areas with apocrine glands, axillae, and the pubic region. … Read more

Pathogenesis and Clinical Manifestations of Mycoplasma pneumoniae

September 5, 2022March 6, 2022 by Sagar Aryal, PhD
Pathogenesis and Clinical Manifestations of Mycoplasma pneumoniae

Pathogenesis of Mycoplasma pneumoniae M. pneumoniae is an extracellular pathogen transmitted by respiratory droplets expectorated during coughing which then adheres to the respiratory epithelium by means of a specialized attachment … Read more

Laboratory diagnosis, Treatment and Prevention of Mycoplasma pneumoniae

September 5, 2022March 5, 2022 by Sagar Aryal, PhD
Laboratory diagnosis, Treatment and Prevention of Mycoplasma pneumoniae

Laboratory diagnosis of Mycoplasma pneumoniae Specimen Ideal specimens are throat swabs and nasopharyngeal aspirates, lung biopsies, expectorated sputum. Washings are more reliable than sputum specimens because most infected patients have … Read more

Shiga Toxin-Producing E. coli (STEC): Characteristics, Shiga Toxin & Infections

September 26, 2026March 3, 2022 by Sagar Aryal, PhD
Shiga toxin-producing Escherichia coli (STEC)

Image: Working colonization model for STEC infecting humans and persisting in ruminants. (A) The diagram shows a human intestinal epithelial cell displaying the first stages of colonization by STEC in … Read more

Acinetobacter baumannii: Morphology, Characteristics, Infections & Identification

September 26, 2026March 1, 2022 by Sagar Aryal, PhD
Acinetobacter baumannii

Habitat of Acinetobacter baumannii The first Acinetobacter found in soil was discovered in 1911 by M.W. Beijerinck. It is associated with the aquatics environment. It has been recovered from soil, water, … Read more

Laboratory diagnosis of Syphilis caused by Treponema pallidum

September 5, 2022February 25, 2022 by Sagar Aryal, PhD
Laboratory diagnosis of Syphilis caused by Treponema pallidum

Laboratory diagnosis of Syphilis caused by Treponema pallidum Specimen Samples collected from ulcers and lesions should not be contaminated with blood, microorganisms, or tissue debris. Polymerase chain reaction (PCR) samples … Read more

Bacillus anthracis: Morphology, Characteristics, Anthrax & Diagnosis

September 26, 2026February 19, 2022 by Anupama Sapkota
Bacillus anthracis

Bacillus anthracis definition Bacillus anthracis is the only obligate pathogenic species of Bacillus and the causative agent of anthrax, which is a common disease of livestock and occasionally occurs in … Read more

Enteroaggregative E. coli (EAEC): Characteristics, Virulence, Diarrhea & Diagnosis

September 26, 2026February 15, 2022 by Sagar Aryal, PhD
Stages of pathogenesis of EAEC

Enteroaggregative E.  coli (EAEC) are a heterogeneous collection of strains characterized by their autoagglutination in a “stacked-brick” arrangement over the epithelium of the small intestine and, in some cases, the … Read more

Laboratory diagnosis of Legionella pneumophila

September 5, 2022February 7, 2022 by Sagar Aryal, PhD
Laboratory diagnosis of Legionella pneumophila

Laboratory diagnosis of Legionella pneumophila Specimen: Respiratory secretions (sputum, bronchial aspirate or washings), as well as pleural fluid, lung biopsy or autopsy material. Microscopy Legionellae in clinical specimens stain poorly … Read more

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