1. How do parasitic organisms overcome the difficulties they face in transmitting the next generation to a suitable host? They do so by producing resistant eggs or cysts. Parasitic organisms have a greater reproductive potential than do most free-living species thus increasing the chances of transfer to a suitable host Some parasitic organisms increase their numbers by reproducing asexually in the intermediate host making it more likely that they will make their way to a suitable host. Most parasitic organisms produce toxins that discourage unsuitable hosts. Some parasitic organisms increase their numbers by reproducing sexually in the intermediate host making it more likely that they will make their way to suitable host 2. The parasite’s effect upon human by Nutrition robbing Mechanical injury Poisoning lesion Allergy reactions Immune-suppression

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Parasitic infections

A parasite is an organism that lives in the body of another organism and obtains food at the expense of the host. There are two kinds of parasites they are internal and external. An internal parasite lives inside another organism and is known as endoparasite. An external parasite lives on the body surface of the host and is known as an ectoparasite.