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9.4 Search for better health: 2. Infectious and non-infectious diseases

Syllabus reference (October 2002 version)
2. Over 3000 years ago the Chinese and Hebrews were advocating cleanliness in food, water and personal hygiene

Students learn to:


Extract from Biology Stage 6 Syllabus (Amended October 2002). © Board of Studies, NSW

Background: Even though they did not know about microscopic disease-causing organisms, many social groups established rules and practices that protected people against infectious diseases. These practices resulted from observing cause and effect relationships. For example, the Chinese could have deduced the connection between water contaminated by faeces and gastro-intestinal diseases, and the Hebrews may well have made a connection between the symptoms of infection by tapeworms and eating undercooked pork.

distinguish between infectious and non-infectious disease

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identify data sources, plan and choose equipment or resources to perform a first hand investigation to identify microbes in food or in water

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explain why cleanliness in food, water and personal hygiene practices assist in the control of disease

A website that has some information on water quality is Water Quality (external website) Sydney Catchment Authority, 2008

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identify the conditions under which an organism is described as a pathogen

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gather, process and analyse information from secondary sources to describe ways in which drinking water can be treated and use available evidence to explain how these methods reduce the risk of infection from pathogens

Contamination of drinking water is a common way for pathogens to enter the body.

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