What genus of bacteria is gram-negative?

As gram negative bacteria particularly genus Pseudomonas are comparatively more sensitive towards irradiation, studies on irradiated raw poultry meat, vegetables and fruits products showed the change in microbial load by irradiation (International Atomic Energy Agency, 1994).

What is the structure of gram-negative bacteria?

Gram-negative bacteria are surrounded by a thin peptidoglycan cell wall, which itself is surrounded by an outer membrane containing lipopolysaccharide. Gram-positive bacteria lack an outer membrane but are surrounded by layers of peptidoglycan many times thicker than is found in the Gram-negatives.

What is the genus of Gram-positive bacteria?

Actinobacteria is the taxonomic name of the class of high G+C gram-positive bacteria. This class includes the genera Actinomyces, Arthrobacter, Corynebacterium, Frankia, Gardnerella, Micrococcus, Mycobacterium, Nocardia, Propionibacterium, Rhodococcus, and Streptomyces.

What are the characteristics found in gram-negative bacteria?

Characteristics of Gram-negative Bacteria Gram-negative bacteria have a cytoplasmic membrane, a thin peptidoglycan layer, and an outer membrane containing lipopolysaccharide. There is a space between the cytoplasmic membrane and the outer membrane called the periplasmic space or periplasm.

How do you determine the genus and species of bacteria?

Identification practices are simplified by having the most phenotypically similar species in the same genus. The primary consideration for a genus is that it contain biochemically similar species that are convenient or important to consider as a group separate from other groups of organisms.

How do you write genus and species of bacteria?

Naming rules The current nomenclature for bacterial species requires a capital letter for the genus name and an epithet beginning by a lowercase letter for the species name [7]. Genera and epithet should be Latin or Latinized; the specific epithet is an adjective that must agree with the gender of the generic name [7].

What is bacterial genus?

Bacterial names are based on the binomial system: the first name is the genus, the second name is the species. When written, the genus name is capitalized and the species name is not. Both genus and species names are italicized (e.g., Escherichia coli). A genus is a group of related species.

Why are bacteria called Gram-negative bacteria?

In 1884, a bacteriologist named Christian Gram created a test that could determine if a bacterium had a thick, mesh-like membrane called peptidoglycan. Bacteria with thick peptidoglycan are called gram positive. If the peptidoglycan layer is thin, it’s classified as gram negative.

How many layers does Gram-negative have?

The Gram-negative cell wall consists of 2-3 interconnected layers of peptidoglycan surrounded by an outer membrane.

Which group of bacteria is Gram negative?

Gram-Negative Bacteria: Group # 3. The Methylotrophic Bacteria: All methylotrophic bacteria are aerobic, Gram-negative, morphologically and phylogenetically diverse organisms.

What are the characteristics of Gram-negative bacteria?

Gram-negative bacteria are characterized by their cell envelopes. The cell envelope of the gram negative bacteria cell is made up of a thin peptidoglycan cell wall incorporated between an inner cytoplasmic cell membrane and an outer membrane. These organisms can be found in virtually all environments on Earth that support life.

What is the role of Gram negative bacteria in the environment?

Gram-Negative Bacteria: Group # 4. The Nitrifying Bacteria: These bacteria perform an important ecological function by converting ammonia into nitrate, a process known as nitrification. Ammonia released from hydrolytic degradation of proteins of plant, animal or microbial remain is oxidized in two steps to nitric acid.

What is the color of Gram negative bacteria under microscope?

Hence, the gram-negative bacteria color appears pink to red when viewed under a microscope. The Gram staining procedure is a differential staining technique used to differentiate bacterial cells into gram-positive or gram-negative bacteria based on the differences in their cell wall components.