0
Can you provide examples of both gram positive and gram negative bacteria in the context of bacterial classification?
Gram-positive bacteria have a thick layer of peptidoglycan in their cell walls, retaining the crystal violet stain in the Gram staining process. Examples include Staphylococcus aureus and Streptococcus pneumoniae. Gram-negative bacteria have a thinner layer of peptidoglycan and an outer membrane, causing them to lose the crystal violet stain. Examples include Escherichia coli and Pseudomonas aeruginosa.
Add your answer:
Earn +20 pts
Why do bacterial cell walls carry a negative charge?
The Gram positive bacterial cell wall is made up of thick peptidoglycan layer which is rich in Teichoic acids. These teichoic acids are negatively charged because of presence of phosphate in their structure. The Gram negative bacteria have an outer membrane composed of phospholipids and Lipopolysaccharides. The lipopolysaccharides impart a strongly negative charge to surface of Gram negative bacterial cells.
Is amoeba gram positive or gram negative?
Amoebas are not bacteria and therefore do not have a gram classification. They are eukaryotic organisms belonging to the phylum Rhizopoda.
Is gram positive bigger than gram negative?
Not necessarily. Gram positive and gram negative bacteria can vary in size depending on the species. Both gram positive and gram negative bacteria can range in size from small cocci to long rod-shaped cells.
What is negative lactose fermentative organisms?
Negative lactose fermentative organisms are bacterial species that do not ferment lactose, a type of sugar. This means they are unable to utilize lactose as a carbon source for energy production. Examples include Salmonella and Shigella species.
Gram negative cocci?
Gram positive cocci are bacteria that are spherical in shape and have a thick cell wall made of peptidoglycan. They can be connected in chains, clusters or various other arrangements. They are common on the skin and in the respiratory tract of humans, Some are normal flora, while others are pathogens.
What is culture negative bacterial endocarditis?
Endocarditis is an inflammation of the endocardium (part of the heart), and if it is bacterial, the cause for it is bacteria. The part of the term culture negative, means that they tried to grow the bacteria in the lab after taking a blood sample, and were unable to get it to grow.
Why is important to distinguish between Gram-positive and Gram-negative bacteria in diagnosing a bacterial infection?
gram- negative and gram- positive bacteria differ in their response to different antibiotics
What are the examples of Bile-tolerant Gram-negative bacteria?
psedomonas
Can antibiotics lead to septic shock if used to treat gram-positive bacterial infections?
No, but it can if it is gram negative bacteria..
Does streptomycin kill gram negative bacteria?
Yes, streptomycin is effective against both gram positive and gram negative bacteria. It works by inhibiting protein synthesis in bacterial cells, leading to their death.
Why do bacterial cell walls carry a negative charge?
The Gram positive bacterial cell wall is made up of thick peptidoglycan layer which is rich in Teichoic acids. These teichoic acids are negatively charged because of presence of phosphate in their structure. The Gram negative bacteria have an outer membrane composed of phospholipids and Lipopolysaccharides. The lipopolysaccharides impart a strongly negative charge to surface of Gram negative bacterial cells.
What type of bacteria is Chlamydia trachomatis?
Chlamydia is a sexually transmitted bacterial infection. It is caused by Chlamydia trachomatis, a gram-negative bacteria with a coccoid shape that is an obligate intracellular parasite. It is curable.
Is amoeba gram positive or gram negative?
Amoebas are not bacteria and therefore do not have a gram classification. They are eukaryotic organisms belonging to the phylum Rhizopoda.
Is gram positive bigger than gram negative?
Not necessarily. Gram positive and gram negative bacteria can vary in size depending on the species. Both gram positive and gram negative bacteria can range in size from small cocci to long rod-shaped cells.
What is negative lactose fermentative organisms?
Negative lactose fermentative organisms are bacterial species that do not ferment lactose, a type of sugar. This means they are unable to utilize lactose as a carbon source for energy production. Examples include Salmonella and Shigella species.
What are some examples of pyrogens?
Some examples of pyrogens are bacterial endotoxins, such as lipopolysaccharides (LPS) found in the outer membrane of gram-negative bacteria, and certain viral and fungal components. These substances can induce fever by activating immune cells to release cytokines such as interleukin-1 (IL-1) and tumor necrosis factor-alpha (TNF-α), which then act on the hypothalamus to raise body temperature.
What bacterial species are gram negative coccobacilli capable of living intracellular within a host?
Examples of gram-negative coccobacilli that are capable of living intracellularly within a host include Francisella tularensis, Brucella spp., and Bartonella spp. These bacteria have evolved mechanisms to evade host immune responses and survive within host cells.
