0
Why are encapsulated strains much more likely to cause disease than strains that do not produce a capsule?
Some bacterial cells are surrounded by an extracellular slime layer called a capsule or glycocalyx. This structure can play a protective role for certain pathogenic bacteria such as streptococcus pneunoniae. The capsule prevents phagocytic white blood cells from engulfing and destroying this bacterial pathogen, enabling the organism to invade the lungs and cause pneumonia. The capsule is also a means for many bacteria to attach to solid surfaces in the environment.
What else can I help you with?
Why are encapsulated strains of streptococcus pneumonia much more likely to cause disease than strains that do not produce a capsule?
Capsules are quite difficult to penetrate. The capsule of Streptococcus pneumoniae prevents phagocytic white blood cells from engulfing and destroying this bacterial pathogen. Thus, our immune system has a struggle to eradicate it.
Why are encapsulated of Streptococcus pneumoniae much more likely to cause disease that strains that do not produce a capsule?
Capsules are quite difficult to penetrate. The capsule of Streptococcus pneumoniae prevents phagocytic white blood cells from engulfing and destroying this bacterial pathogen. Thus, our immune system has a struggle to eradicate it.
What is the importance of Capsule forming bacteria?
Certain bacteria that cause pneumonia, notably Klebsiella pneumoniae and Streptococcus pneumoniae, exist as both an encapsulated and unencapsulated form. The encapsulated form of these bacteria are protected by a polysaccharide (short chain carbohydrate) capsule, which shields the bacteria from the host's immunilogical response, and confers virulence, or the ability to cause disease, to the encapsulated strains of these bacteria.
What is the difference between pathogenic staphylococci from non-pathogenic strains?
Pathogenic staphylococci can cause infections in humans, while non-pathogenic strains do not typically cause harm. Pathogenic strains often produce toxins and enzymes that contribute to disease, while non-pathogenic strains lack these virulence factors. Additionally, pathogenic strains are more likely to be antibiotic resistant compared to non-pathogenic strains.
How could a capsule increase the pathogenicity of a bacterium?
A capsule surrounds the outside of the cell. Since the chemicals in many capsules are similar to those normally found in the body, they may prevent bacteria from being recognized or devoured by defensive cells of the host. For example, the capsules of Streptococcus pneumoniae enable these prokaryotes to avoid destruction by defensive cells in the respiratory tract and cause pneumonia....uncapsuled strains of these same bacterial species do NOT cause disease b/c the body's defensive cells destroy them.
44 62 Parasitic strains of E. coli may produce poisonous chemicals that attack living tissue and cause disease in humans These chemicals are called?
Viruses
Why do we have to get a diffrent flu vaccine every year?
The influenza virus is in a continuous state of mutation. Each year different strains become prominent. If the educated guesses of the disease control folks are accurate, they can produce a vaccine that will be aligned with the proteins on all of the most common strains for a given year. Occasionally they get it wrong and the vaccine is only effective against a fraction of the most common strains. Because the strains are different from year to year, the previous year's vaccination is not very likely to provide immunity for the currently most common strains.
Some bacteria strains may acquire resistance to antibiotics and or the ability to cause disease by acquiring what?
Some bacteria strains may acquire resistance to antibiotics and/or cause a new disease by gaining spores from other bacteria.
What does disease h p v stand for?
Human Papilloma Virus. Some strains are genital warts. Some strains can cause cervical cancer or other cervical problems.
Does klebsiella produce red pigment?
Some strains of Klebsiella, such as Klebsiella pneumoniae, can produce a red pigment called prodigiosin. This pigment is most commonly associated with other bacterial species like Serratia marcescens. Klebsiella strains that produce red pigment are not as common.
Tetracycline is used in genetic engineerin experiments as a way to?
Produce stronger strains of bacteria
Why mushroom produce spores?
They produce spores as a means of self propagation in the same manner as plants produce seeds so that they might propagate into the world. The sexual act of different strains interacting results in new stronger strains and on occasion whole new species all together.
