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Non Fastidious Bacteria Examples


Non-fastidious bacteria are those that do not require any special conditions or substances for their growth. They can be grown in a variety of media, including simple broths and agar plates. Here are some examples of non-fastidious bacteria and their non-fastidious nature:

Non Fastidious Bacteria Examples

Escherichia coli (E. coli)

It is a gram-negative, rod-shaped bacterium that is found in the intestines of humans and other animals. E. coli is a non-fastidious bacterium, meaning that it can grow in a variety of media, including simple broths and agar plates. E. coli is a common cause of food poisoning, but it can also cause other infections, such as urinary tract infections and pneumonia.

Staphylococcus aureus (S. aureus)

is a gram-positive, coccus-shaped bacterium that is commonly found on the skin and in the nose of humans. S. aureus is a non-fastidious bacterium, meaning that it can grow in a variety of media, including simple broths and agar plates. S. aureus is a common cause of skin infections, such as boils and pimples, but it can also cause more serious infections, such as pneumonia and sepsis.

Pseudomonas aeruginosa

P. aeruginosa is a gram-negative, rod-shaped bacterium that is found in the environment. It is a non-fastidious bacterium, meaning that it can grow in a variety of media, including simple broths and agar plates. P. aeruginosa is a common cause of infections in people with weakened immune systems, such as those with cystic fibrosis or cancer. This bacteria can also cause infections in healthy people, such as pneumonia and skin infections.

Streptococcus pneumoniae

S. pneumoniae is a gram-positive, coccus-shaped bacterium that is found in the respiratory tract of humans. S. pneumoniae is a non-fastidious bacterium, meaning that it can grow in a variety of media, including simple broths and agar plates. S. pneumoniae is a common cause of pneumonia, meningitis, and ear infections.

Enterobacter aerogenes

Enterobacter aerogenes is a non-fastidious bacterium. It can grow on various culture media such as nutrient agar, tryptic soy agar, or MacConkey agar. These media provide the necessary nutrients, including carbohydrates, amino acids, vitamins, and minerals, for the bacterium’s growth. It has a wide temperature range (from 4°C to 42°C) and can grow with or without oxygen. It is resistant to many antibiotics and is a common cause of infections in humans and animals.

Bacillus anthracis

Bacillus anthracis is gram-positive, rod-shaped, non-fastidious bacterium. This bacterium is responsible for causing the deadly disease anthrax. This bacterium can grow well on basic laboratory media such as nutrient agar, tryptic soy agar, or blood agar. Bacillus anthracis has the ability to grow under both aerobic and anaerobic conditions. The preferred temperature range for its growth is 35–37 °C. The anthrax disease primarily affects animals, especially herbivores, but it can also infect humans.

Listeria monocytogenes

Listeria monocytogenes is a Gram-positive, facultatively anaerobic bacterium that does not form spores. It causes a serious infection called listeriosis which is foodborne infection. Listeria monocytogenes is classified as a non-fastidious organism, meaning it can grow in a wide range of conditions that may not be suitable for other bacteria. It can tolerate temperatures ranging from 1°C to 45°C, with an optimum growth temperature of 30°C to 37°C. It can also survive and multiply across a wide pH range, from 4.4 to 9.4, with the best growth occurring at pH 7.0 to 7.5. Additionally, Listeria monocytogenes can grow in the presence of oxygen or in anaerobic conditions, making it highly adaptable and difficult to control.

Acinetobacter spp

Acinetobacter species, including Acinetobacter baumannii, are non-fastidious bacteria. These are gram negative, aerobic cocco-baccillus. These bacteria grow easily on regular laboratory media such as nutrient agar, tryptic soy agar, or blood agar, However, it’s important to note that Acinetobacter baumannii, in particular, is known for its antibiotic resistance and ability to cause healthcare-associated infections, making it a significant public health concern.

Klebsiella pneumoniae

Klebsiella pneumoniae is a non-fastidious, encapsulated gram-negative bacillus.  It is the causative agent of urinary tract infections, pneumonia, liver abscess, surgical site infections and bloodstream infections especially in immunocompromised patients. This bacterium can grow on a variety of media and under a variety of conditions. Here are some of the non-fastidious properties of Klebsiella pneumoniae:

  • Can grow on a variety of media, including blood agar, MacConkey agar, and Sabouraud dextrose agar.
  • Can grow at a wide range of temperatures, from 4°C to 42°C.
  • Can grow in the presence of a variety of nutrients, including glucose, lactose, and sucrose.
  • Can survive for long periods of time in the environment, even in dry conditions.

Serratia marcescens

The bacteria in the Serratia genus are Gram-negative and facultative anaerobic. Serratia marcescens is a non-fastidious bacterium. This bacteria can grow in a wide range of temperatures and substrates, including plants, soil, water, and various food products like fruit juices, coconut, and fish. In the laboratory, it can be easily isolated and grown on common media such as such as Nutrient Agar, Tryptic Soya Agar, MacConkey Agar, Eosin Methylene Blue Agar, Blood Agar, and Cetrimide Agar.

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