Vector Borne Diseases

Question 1

What are the basic elements of the transmission cycle?

Answer 1

1. Disease agent
2. The vector
3. Primary Resivoir or host
4. Permissible environment

Question 2

What are the components of a disease agent?

Answer 2

1. Virus
2. Bacteria
3. Protozoa

Question 3

What are the components of the vector?

Answer 3

1. Insects: Diptera, Hemiptera, Fleas,
2. Non insect: Ticks and mites

Question 4

What are the components of the primary resivoir

Answer 4

1. Vertebrae that is readily infected and can host LONG enough to serve as host to vectors

Question 5

What are the components of a permissible environment?

Answer 5

1. Agent vector and host requirements to propogate or transmit

Question 6

What components make up the transmission cycle for malaria?

Answer 6

1. Disease agent: Single celled parasite: plasmodium
2. The vector: Anopheles mosquito
3. Primary reservior or host: Host: Human
4. Permissible environment: Warm environment human will not get malaria treatment

Question 7

What are the two modes of transmission?

Answer 7

1. Zoonosis
2. Anthroponosis

Question 8

What is zoonosis?

Answer 8

Any disease or infection that is naturally transmissible from vertebrate animals to humans

Question 9

What is anthroponosis?

Answer 9

Diseases that are transmissible from human to human

Question 10

What is R naught?

Answer 10

Basic reproducctive rate that determines whether an epidemic will occur

Question 11

When does an epidemic occur?

Answer 11

If R naught is less than one, and fails if R naught is greater than one

Question 12

Write out what each symbol represents in the formula for R naught

Answer 12

get paper and write it

Question 13

What is persistence?

Answer 13

Disease remaining and spreading after initial invasion

Question 14

What does persistence require?

Answer 14

Susceptible hosts

Question 15

What is critical community size?

Answer 15

The threshold host population size above which disease fade out is unlikely

Question 16

What is herd immunity?

Answer 16

The indirect protection from an infectious disease that happens when a population is immune either through vaccination or immunity developed through previous infection