gram positive and gram negative bacteria ppt

1. What is the different between Gram positive and Gram negative bacteria?
2. Is Gram positive or negative worse?
3. What is the structure of Gram positive bacteria?
4. Which drugs are effective against both gram positive and gram negative bacteria?
5. Is E coli gram positive?
6. Why is it important to know whether bacteria are gram negative or gram positive?
7. What kills gram negative?
8. What color is gram negative bacteria?
9. What does Gram positive bacteria cause?

What is the different between Gram positive and Gram negative bacteria?

Gram positive bacteria have a thick peptidoglycan layer and no outer lipid membrane whilst Gram negative bacteria have a thin peptidoglycan layer and have an outer lipid membrane. ... The Gram staining technique was developed in 1884 by Danish bacteriologist Hans Christian Gram¹.

Is Gram positive or negative worse?

Gram-positive bacteria cause tremendous problems and are the focus of many eradication efforts, but meanwhile, Gram-negative bacteria have been developing dangerous resistance and are therefore classified by the CDC as a more serious threat.

What is the structure of Gram positive bacteria?

Gram-positive bacteria are surrounded by many layers of peptidoglycan (PG), which form a protective shell that is 30–100 nm thick (Silhavy et al. 2010). The PG layers are covalently modified with carbohydrate polymers including wall teichoic acids (WTAs) or functionally related anionic glycopolymers as well as CPS.

Which drugs are effective against both gram positive and gram negative bacteria?

Tetracyclines are broad-spectrum antibiotics, active against both Gram-positive and Gram-negative bacteria.

Is E coli gram positive?

Escherichia Coli is a Common Intestinal Bacteria. E. coli is a Gram negative anaerobic, rod-shaped, coliform bacteria of the genus Escherichia, commonly found in the lower intestine of humans and animals. Most varieties are harmless.

Why is it important to know whether bacteria are gram negative or gram positive?

If bacteria are present, this test can also help your doctor learn if the bacteria are gram negative or gram positive. The difference between gram-negative and gram-positive bacteria can affect their recommended treatment plan. Gram stains can be performed on various types of specimens, including: blood.

What kills gram negative?

Fourth-generation cephalosporins such as cefepime, extended-spectrum β-lactamase inhibitor penicillins (piperacillin/tazobactam, ticarcillin/clavulanate) and most importantly the carbapenems (imipenem/cilastatin, meropenem, ertapenem) provide important tools in killing Gram-negative infections.

What color is gram negative bacteria?

Gram negative organisms are Red. Hint; Keep your P's together; Purple is Positive. Gram stains are never pink they are red or purple so you don't destroy the rule; keep your P's together. In microbiology bacteria have been grouped based on their shape and Gram stain reaction.

What does Gram positive bacteria cause?

Gram-positive cocci cause certain infections, including the following: Pneumococcal infections. Staphylococcal aureus infections. Streptococcal infections.