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Does neisseria meningitidis have exotoxins and endotoxins?
Neisseria meningitidis does not produce exotoxins; instead, it causes disease through its capsule and other cell components. It contains endotoxins, which are components of its cell wall that can trigger an inflammatory response in the body.
Is mycolic acid found in gram positive and gram negative cell wall composition?
Mycolic acid is primarily found in the cell walls of mycobacteria, which are a type of bacteria that include the causative agents of tuberculosis and leprosy. It is not typically found in the cell walls of other bacteria, including those classified as gram-positive or gram-negative.
What microbes are found in bronchitis?
gram positive microbs
Is the bacteria found in the mouth normally gram positive or gram negative?
The two most aggresive forms of bacteria found in the mouth, porphyromonas gingivalis and actinobacellus actinomycetemcomitans, are both gram negative. The two most aggresive forms of bacteria found in the mouth, porphyromonas gingivalis and actinobacellus actinomycetemcomitans, are both gram negative.
Why are gram positive bacteria more heat resistant than gram negative bacteria?
Gram positive bacteria contain more peptidoglycan than gram negative bacteria which is the substance responsible for the increased strength of gram positive bacterias cell walls therefore making them more resistant to heat. Gram negative do contain peptidoglycan but much, much less
Is Staphylococcus saprophyticus gram positive or negative?
Yes. Staphylococci are classified as gram positive bacteria and appear as purple spheres when Gram stained.
Which is not found in a gram negative bacterial cell?
In a Gram-negative bacterial cell, peptidoglycan is present but in a much thinner layer compared to Gram-positive bacteria. However, unlike Gram-positive bacteria, Gram-negative cells do not have a teichoic acid layer. Additionally, they possess an outer membrane containing lipopolysaccharides (LPS), which is absent in Gram-positive bacteria. Therefore, teichoic acids are not found in Gram-negative bacterial cells.
What are the characteristics of exotoxins?
1.Found in both gram + and gram - bacteria 2.Toxic in small amounts 3.secreted by living bacteria 4.composed of proteins (polypeptides) 5.disease is caused by the toxin released, not the bacteria secreting it 6.target specific toxins (four classifications) *Neurotoxin- Attack the nervous system example= Clostridium tetani=tetanus Clostridium botulae=botulism *Enterotoxin-Attack the gastrointestinal system example= Vibrio cholerae =cholera *Hemotoxin= Attacks and destroys RBC's example= Streptococcus pyogenes=strep throat Staphylococcus aureus-MRSA *Cytotoxin= Kills any host cells example=diptheria
Is MRSA gram positive or gram negative?
gram positive
Micrococcus luteus gram positive or gram negative?
Gram Positive.
Are penicillin binding proteins found in gram positive and gram negative bacteria?
Yes, penicillin binding proteins (PBPs) are found in both gram positive and gram negative bacteria. PBPs are enzymes involved in cell wall biosynthesis and are the target of beta-lactam antibiotics like penicillin.
Is tetanus gram positive or gram negative?
Tetanus is caused by the bacterium Clostridium tetani, which is a Gram-positive bacterium.
