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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.

Virulence factors, Pathogenesis and Clinical manifestations of Streptococcus pneumoniae

September 20, 2022April 3, 2022 by Sagar Aryal, PhD
Virulence factors, Pathogenesis and Clinical manifestations of Streptococcus pneumoniae

Virulence factors of Streptococcus pneumoniae Polysaccharide capsule The capsule is antiphagocytic, inhibiting complement deposition and phagocytosis. 2. Cell wall associated polymers and proteins Teichoic acid โ€“ binds to epithelial cells … Read more

Factors affecting bacterial pathogenicity

May 4, 2022April 3, 2022 by Sagar Aryal, PhD
Factors affecting bacterial pathogenicity

A microbe that is capable of causing disease is referred to as aย pathogen. Pathogenicityย is the ability of a microorganism to cause disease in another organism, namely theย host. Pathogens vary in … Read more

Laboratory diagnosis, treatment and prevention of Rickettsia rickettsii

September 20, 2022March 29, 2022 by Sagar Aryal, PhD
Laboratory diagnosis, treatment and prevention of Rickettsia rickettsii

Laboratory diagnosis of Rickettsia rickettsii Specimen:ย Skin biopsies, serum Direct detection method Although Rickettsiae stain poorly with Gram stain, they can be stained with Giemsa or Gimenez stains. Direct detection of … Read more

Pathogenesis and Clinical Manifestations of Mycobacterium leprae

September 20, 2022March 25, 2022 by Sagar Aryal, PhD
Pathogenesis and Clinical Manifestations of Mycobacterium leprae

Pathogenesis of Mycobacterium leprae M. lepraeย is an acid-fast, gram-positive obligate intracellular bacillus that shows tropism for cells of the reticuloendothelial system and peripheral nervous system (notably Schwann cells). Organisms may … Read more

Habitat and Morphology of Mycoplasma pneumoniae

September 20, 2022March 23, 2022 by Sagar Aryal, PhD
Habitat and Morphology of Mycoplasma pneumoniae

Habitat of Mycoplasma pneumoniae They are found in the mucosa of upper respiratory tract (UTR) and urogenital tract of humans. Also found in oral cavity. They are also present in … Read more

Laboratory diagnosis of Bacterial vaginosis caused by Gardnerella vaginalis

September 20, 2022March 20, 2022 by Sagar Aryal, PhD

Laboratory diagnosis of Bacterial vaginosis caused by Gardnerella vaginalis Specimen: Vaginal discharge specimen A. Direct Microscopic Examination Bacterial Vaginosis (BV) is characterized by a foul-smelling discharge. A diagnosis/confirmation is done … Read more

Neisseria gonorrhoeae- Laboratory Diagnosis, Treatment, Prevention

July 11, 2022March 20, 2022 by Sagar Aryal, PhD
Neisseria gonorrhoeae- Laboratory Diagnosis, Treatment, Prevention

Neisseria gonorrhoeae is an obligate human pathogen and is the etiological agent of gonorrhea. In the United States, it is the second most commonly reported communicable disease, with more than … Read more

Vibrio cholerae Food Poisoning- Cholera toxin (CT)

March 24, 2022March 20, 2022 by Sushmita Dura
Vibrio cholerae Food Poisoning

Vibrios are inhabitants of the marine environment and are aquatic bacteria that can be found as planktons. They are normally present in aquatic animals and seafood products and only a … Read more

Pathogenesis and Clinical Manifestations of Leptospira interrogans

September 20, 2022March 15, 2022 by Sagar Aryal, PhD
Pathogenesis and Clinical Manifestations of Leptospira interrogans

Pathogenesis of Leptospira interrogans Leptospires usually enter the body through the mucous membranes of the upper respiratory tract or the conjunctivae, or through abraded skin, following exposure to contaminated water, … Read more

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

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