All of the following must happen for a disease to occur EXCEPT ...

[tingc95]

All of the following must happen for a disease to occur EXCEPT
 
  A) the host must be susceptible.
  B) an agent must transmit a disease.
  C) the environment must promote it.
  D) the host must never have had the disease before.

Question 2

Explain why people with diabetes that is poorly managed are at increased risk for amputations, especially of the toes and feet.
 
  What will be an ideal response?

[softEldritch]

Answer to Question 1

Answer: D

Answer to Question 2

Answer: Tissue damage from trauma and infections, especially in the feet, are a frequent threat to people with diabetes. At the same time, nerve damage reduces sensation in the extremities, allowing people with diabetes to be unaware of traumatic or infectious tissue damage until it has progressed. Moreover, high blood glucose damages blood vessels serving the limbs and impairs delivery of nutrients to assist in wound healing; thus, amputations are often necessary.

[tingc95]

TYSM

[lkanara2]

Gracias!