MCB Lecture 43 Infectious Disease and Causative Agents Flashcards Preview

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Flashcards in MCB Lecture 43 Infectious Disease and Causative Agents Deck (11)
0

What are the most common causes of death and disease worldwide?

1. Infectious diseases
2. Heart disease
3. Cancer

1

Which geographical regions are most affected by infectious disease?

Africa

Middle eastern and Asian countries

2

What are the most common types of infectious disease worldwide?

Respiratory
Diarrhoeal
HIV/AIDS
TB
Malaria

3

Discuss some of the features of infectious disease

Caused by a single agent
Transmissible
Potential for a global impact
Potential for long lasting immunity
Potential for prevention
Potential for eradication
Simple curative treatments
Treatment can have multiplying effects

4

Who was Antoni van Leeuwenhoek?

He was a 17th century glass maker, that made the first microscope

With it, he observed and describe bacteria. However, he did not know what they were, and he didn't know that they caused disease

5

Which feature did Woese use in his classification of all living things?

The relatedness of rRNA across all living things

6

Differentiate between the different infectious agents in humans

Prions: "infectious protein"
Viruses: have either DNA or RNA, and a protein coat
Bacteria: prokaryotic cells
Fungi: eukaryotic, plat like cells; moulds, yeasts
Parasites: eukaryotic, animal like

7

What are 'new bacteria'?

These are the new strains of bacteria that are discovered on a regular basis

8

What are Superbugs?

These are bacteria that have evolved resistance to antibiotics

Eg. Penicillin-resistant Staphylococcus aureus
Extensively-resistant Mycobacterium tuberculosis

9

What affect does AIDS have on life expectancy?

In many African countries, it dramatically reduces life expectancy
In Zimbabwe, life expectancy is almost halved

10

What are some factors that affect disease emergence?

1. Human behaviour: sexual, IV drug use, air travel
2. Public health measures
3. Ecological effects
4. High mutation rate
5. Population growth
6. Organ transplant

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