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Lecture 8

EESA10 Lecture 8

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Environmental Science
Jovan Stefanovic

Lecture 8Foodborne Hazards and Human HealthWhen we eat something and we get stomach pain and cramps we usually say It must be something I ateFoodborne illnessesThere are two major forms of foodborne illnesses First one is transmissible diseases caused by bacteria viruses and parasites like worms etc The other group are called nontransmissible diseases something that cannot be transmitted from person to person Some of these diseases that will be discussed in this lecture are Shellfishassociated toxins something that can cause poisoning Colour additives Bioengineered foods Obesity Diabetes These are some of the major ones but not all are listed here Cardiovascular diseases can also be associated with foodTransmissible Foodborne illnessesTypes of foodWe are all aware that in Canada we have one of the safest food supplies in the world However every year significant number of people get sick as a result of the contaminated food Some examples of food that could turn out to be the reason of poisoning include Meat number one cause milk dairy products cheese in summer ice cream can be very risky from some sources unpasteurised fruit and vegetable juices pasteurised fruits and food material is not that bad for hour health as most the bacteria and contaminants are killed during pasteurization But unpasteurized material can be very toxic if they are contaminatedraw or undercooked eggs chicken tuna potato and macaroni salads cream filled pastries fresh produce like some vegetables spinach can cause food poisoning or salmonellosis spices chocolate has milk in it seafood It is not only up to the type of the food it is also up to how we handle and process the food For example food standing too long in the room temperature maybe it needs to be in the refrigerator right away improper cooking contaminated cutting boards and kitchen tools Symptoms of Foodborne illnessAll of these symptoms are related with your stomach These include diarrhoea abdominal cramping fever vomiting headache sometimes blood in the stool It could also be that you could have all of these symptoms together Usually these symptoms occur after one or two hours of consuming the contaminated food However sometimes when viruses or parasites are the cause of the contamination then it can happen after a couple of days or couple of weeks but not right away If bacteria are the cause these symptoms will start very quickly after you eat the contaminated food Your symptoms will not last for very long usually no longer then a week In more severe cases the duration can be longer for 710 days In summary the symptoms usually last only a day or two sometimes 7 10 days For most people these diseases are not life threatening if the person does not face the complications They can be very severe for young children as they can dehydrate very quickly they cannot drink as they vomit all the time and they need to see a doctor and get hydrated a different way They also can be dangerous for old people as they already have weak immunity Also they can be dangerous for people with certain diseases and
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