0
Why are encapsulated strains much more likely to cause disease than strains that do not produce a capsule?
Wiki User
∙ 13y ago
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.
Wiki User
∙ 13y ago
Wiki User
∙ 11y agoCapsules 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.
Add your answer:
Earn +20 pts
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.
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.
Do humans have amoebas?
There are several varieties found in humans that are not considered to be disease producers. However, such virulent strains as Entamoeba coli and Entamoeba hartmanni, can produce mild diarrhea and dysentery. Most amoeba infestations, however, do not produce clinical symptoms.
Is E.Coli a virus disease or a bacterial disease?
E. coli is not a disease at all, it is a species of bacteria. E. coli can be found as part of the normal microflora in the human gastrointestinal tract, as most strains are harmless. There are some strains (eg: E. coli 01H57) that are pathogenic and can cause enteritis.
Why do mushrooms 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.
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.
