Clostridium perfringens causes gas gangrene, a serious infection of the muscle tissues that can lead to amputation. Clostridium are Gram-positive endospore-formers and obligate anaerobes that are killed when exposed to oxygen. Which of the following virulence factors would be most helpful to this organism in establishing an infection?

In order to establish a successful infection, a pathogen must arrive at a susceptible site, adhere, invade, acquire nutrients, and grow.

Clostridium perfringens causes gas gangrene, a serious infection of the muscle tissues that can lead to amputation. Clostridium are Gram-positive endospore-formers and obligate anaerobes that are killed when exposed to oxygen. Which of the following virulence factors would be most helpful to this organism in establishing an infection?

A endotoxin
B nuclease, an enzyme that breaks down nucleic acids
C collagenase, an enzyme that destroys collagen, which is a major protein of connective tissues
D a neurotoxin

Which of the following virulence factors would be most helpful to this organism in establishing an infection? C collagenase, an enzyme that destroys collagen, which is a major protein of connective tissues

Explanation:

Clostridium Perfringens produces the enzyme collagenase, that breaks down collagen, which is a major supportive protein of connective tissues, found in tendons, cartilage and bones. The pathogenesis of this bacteria is assisted by collagenase in destroying extracellular structures. This is a virulence factor which helps in spreading gas gangrene.

d concave shape of wave rock

explanation:

the concave shape of wave rock is a very good evidence that supports the evolution of earth due to chemical weathering. if we talk about structure of   wave rock, studies have estimated that it is around 2.7 billion years old. it also serves as the foundation of evidence that it was the place where australian continent began to form.

how the structure of wave rock was created?

studies suggest that structure of wave rock was created when the surrounded area was started to weather due to which deposition of material started on the part of land which now contains wave rock.

the structure of wave rock is considered to be one of the best-known landforms in australia. at the height of around 15 cm, there can be found flared slopes which formulate the margins of hyden rock. it is now assumed by geologists that wave rock was created by subsurface water-induced weathering and not by glaciers, waves or wind.

due to deposition of material over the period of long time, the wave rock became tougher and tougher due to weathering from surrounding terrain. this makes it a physical evidence that supports   the evolution of earth due to chemical weathering.

hope it !

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pesticide