What Are The Following Five Types Of Bacteria? (ANSWERS)

What Are The Following Five Types Of Bacteria? (ANSWERS)

FIVE TYPES OF BACTERIA – In this topic, we are going to learn and identify the following five types of bacteria, its meaning and examples.

FIVE TYPES OF BACTERIA
Image from: Keck Schools of Medicine

According to MedicalNewsToday, bacteria (singular: bacterium) are microscopic, single-celled organisms that exist in their millions, in every environment, both inside and outside other organisms.

There are those that are harmful but most of these have a useful purpose. Bacteria support many forms of life, may it be plant or animal, and these are used in industrial and medicinal processes.

Types

There are five types: coccus, bacillus, spirillum, rickettsia, and mycoplasma.

  • Coccus | Cocci
    • These bacteria are spherical in shape. Examples include:
      • Staph aureus
      • S. hominis
      • S. saphrophyticus
      • Strep pyrogenes (gr. A)
      • E. faecalis
      • S. sanguis group
      • S. angiosus group
      • A. adiacens
      • N. gonorrhea
      • Moraxella catarrhalis
  • Bacillus | Bacilli
    • Basically, these are rod-shaped, there are those bacilli that are curved known as vibrio. Examples include:
      • C. diptheriae
      • C. urealyticum
      • Lactobacillus sp.
      • Erisipelothrix rhusiopathiae
      • Escherichia coli
      • Proteus spp.
      • C. koseri
      • Enterobacter cloacae
      • Vibrio cholera
      • Aeromonas hydrophila
      • Stenotrophomonas maltophilia
  • Spirillum| Spirrila
    • These bacteria are spiral in shape. Tight-coiled spirilla are known as spirochetes. Examples include:
      • Treponema carateum
      • Borrelia burgdorferi
      • Borrelia afzelii
      • Leptospira interrogans
      • Spirillum minus
      • Chlamydophila pneumoniae
      • Bacteroides fragilis
      • Capnocytophaga canimorsus
      • Prevotella intermedia
      • Fusobacterium nucleatum
  • Rickettsia
    • These bacteria behave like viruses and cannot live outside living cells. Examples include:
      • Rickettsia rickettsii
      • Rickettsia akari
      • Rickettsia conorii
      • Rickettsia sibirica
      • Rickettsia australis
      • Rickettsia felis
      • Rickettsia japonica
      • Rickettsia africae
      • Rickettsia hoogstraalii
      • Rickettsia prowazekii
  • Mycoplasma
    • These type do not have a cell wall and can be either cocci or bacilli. Examples include:
      • M. buccale
      • M. fermentans
      • M. gallisepticum
      • M. hominis
      • M. hyopneumoniae
      • M. hyorhinis
      • M. lipophilum
      • M. penetrans
      • M. pirum
      • M. salivarium

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