Why are certain gram negative bacteria more resistant than gram positive bacteria to antibiotics that attack cytoplasm?

Gram negative bacteria have thick wall, made up of lipids and polysaccharides molecules so bacteria has harder time penetrating the wall. This is why gram negative are more resistance to antibiotics such as penicillin. ...

Gram negative bacterial cells have an outer membrane that interferes with antibiotics and drug entry into the cell. The bacteria that are resistant to antibiotics are E. coli, salmonella, shigella, and Yersina. The first three affect the GI tract and the second causes the Black Death. These are resistant to penicillin. So ampicillin and streptomycin are used. ...

Antibiotics treat bacterial infections (provided the bacteria isn't resistant to the antibiotic). Different antibiotics are required to treat Gram positive and Gram negative bacteria due to their differing structures. They have no effect on viruses. ...

Polymixin antibiotics interact with the lipopolysaccharide molecule of Gram negative bacteria. This component forms the outer leaflet of the outer membrane. Gram-positive bacteria do not have an outer membrane or lipopolysaccharide and thus polymixin antibiotics are unable to bind to the cell. ...

In short, it's because they have a membrane around their cell wall that both increases their toxicity, and makes them more resistant to antibiotics. It makes them more resistant because many antibiotics, such as penicillin, work by destroying the cell walls of bacteria. Because they have an extra membrane around their cell walls, gram negative bacteria have extra protection against the antibiotics. ...

Gram negative and gram positive bacteria.

S. griseus produces antibiotic, streptomycin, and it is useful against gram negative bacteria. Streptomycin and its relatives are considered reserve antibiotics for resistant bacterial strands because they can be neurotoxic and nephrotoxic. ...

Most likely because Gram positive bacteria have a thicker peptidoglycan cell wall in comparison to Gram negative bacterias two thinner cell walls. ...

Antibiotics are not effective against viruses because viruses are different from bacteria in every way -- in structure, behavior and in the characteristics they have. Viruses aren't technically living, they're fragments of DNA or RNA. Your question is like asking why water isn't effective in cleaning up oil (virus) when it works on dirt (bacteria). As for the second part of your question: There is variety among bacteria. They are not all the same. There are aerobic, anaerobic, gram-positive, gram-negative, autotrophic, heterotrophic. There...

Gram negative cells have a impermeable outer membrane

Answer You can use a "selective" medium that will inhibit the growth of Gram positive bacteria and only allow Gram negative bacteria to multiply. A medium which is commonly used for this is the McConkey agar which contains a crystal violet strain and allows only Gram negative cultures to grow. You can also eliminate Gram positive bacteria with antibiotics (e.g. ampicillin) provided that they are sensitive and not resistant. ...

Gram (-) bacteria have a wider spectrum of antibiotic resistance than Gram (+) bacteria because the Gram (-) bacteria are able to share genes that confer resistance between themselves. Therefore, even though a particular bacterium has never encountered most antibiotics, it carries genes that can be activated to protect it from the antibiotics. ...

Gram positive bacteria responds to the Gram stain; gram negative bacteria does not. The two bacteria do not respond to the same antibiotics. Right now the most dangerous bacteria is a gram negative bacteria. That could change. ...

Gram - and + bacteria differ in the structure of their cell walls. Some antibioitics are better able to cross cell walls of gram - or +, so their resistance to these antibiotics differ.(This is one reason). Of course some antibiotics affect both equally or neither. ...

Peptidoglycan in Gram-negative bacteria is inaccessible to penicillins because penicillin cannot penetrate the Gram-negative outer membrane. ...

008 888888888 8

I believe it is because Gram positive bacteria have a cell wall and some antibiotics, such as penicillin effect the cell wall. Gram negative bacteria do not have cell walls, so penicillin has no effect on these organisms. ...

Yes - Vancomycin works on gram positive bacteria. E. coli is a gram negative bacteria. ...

Because of their cell wall which contains more peptidoglycan.

If antibiotics are overused or used incorrectly there is a chance that the bacteria will become resistant - the antibiotic becomes less effective against that type of bacterium. In most countries outside the U.S. antibiotics are rarely given they are seen as having life long side affects. ...

Antibiotics fight bacterial infections, antibiotics do not fight all bacterial infections however, they generally fight one of two types of bacteria (gram negative and gram positive). Antibiotics have no effect on viral infections or parasites, but they are sometimes prescribed with a viral infection to prevent a bacterial superinfection - when you get a bacterial infection because your immune system was weakened by the viral infection first. Antibiotics have saved more lives than those lost in any war but overusing them or not...

gram- negative and gram- positive bacteria differ in their response to different antibiotics ...

No, but it can if it is gram negative bacteria..

In plants its between the Cell Wall and the cytoplasm. In Gram Positive Bacteria its also between the Cell Wall and the cytoplasm. In Gram Negative Bacteria its between the two membranes. Hope this helps!! ...

The only thing that Gram- and Gram+ have to do with antibiotics is that each stain can give a clue as to which antibiotic might work against the microbe being stained. The outer membrane of Gram-negative microbes prevents antibiotics from entering. Gram-negative bacteria include: E. coli, Salmonella, Shigella, Yersinia. These resistant to penicillin, streptomycin and ampicillin. Most infections due to Gram-positive organisms can be treated with quite a small number of antibiotics. Penicillin, cloxacillin, and erythromycin should be enough to cover 90 per cent...