Pathogens And Disease Transmission
Visão Geral
An outbreak of cholera in a city with poor sanitation, an athlete picking up a fungal infection in a shared changing room, and malaria spreading through a region with stagnant water all look like unrelated problems, but each follows directly from the biology of the organism responsible and the route it uses to reach a new host.
This lesson covers how infectious disease develops in a person, the structure and biology of viruses and bacteria, and the specific transmission, treatment and prevention of seven named diseases: Ebola, HIV, cholera, gonorrhoea, athlete's foot, malaria and typhoid, including the roles of the mosquito and housefly as disease vectors.
Objetivos
- Understand the general course of a disease as: infection, incubation and symptoms
- Know that diseases are caused by pathogenic microorganisms
- Describe the structure and reproduction of viruses
- Describe methods of transmission, treatment and prevention of the spread of Ebola and HIV (human immuno-deficiency virus), the virus that causes AIDS
- Describe the structure, nutrition and reproduction of bacteria including the interpretation of bacterial growth curves
- Investigate the effects of antibacterial agents and antibiotics on the growth of bacterial culture
- Know the methods of transmission, treatment and prevention of the spread of cholera and gonorrhoea
- Explain the importance of oral rehydration therapy
- Know the methods of transmission, treatment and prevention of the spread of athlete's foot
- Explain the role of the mosquito (malaria) and housefly (typhoid) in transmitting causative agents of disease
- Describe the treatment and prevention of the spread of malaria and typhoid
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- Which stage of a disease occurs when a pathogen is multiplying in the body but no symptoms are yet visible? A) Infection B) Incubation period C) Symptomatic stage D) Recovery Answer: B
- Which organism acts as the vector for malaria? A) Housefly B) Anopheles mosquito C) Bacterium D) Fungus Answer: B
- What type of pathogen causes athlete's foot? A) Virus B) Bacterium C) Fungus D) Parasite Answer: C
- Which phase of bacterial growth shows a constant rate of cell division and a steep rise in numbers? A) Lag phase B) Exponential (log) phase C) Stationary phase D) Death phase Answer: B
- Oral rehydration therapy is used mainly to treat the effects of which disease? A) Malaria B) Athlete's foot C) Cholera D) HIV Answer: C
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