Students sometimes react with horror and distress when they discoverthat cats and dogs carry parasites to humans. Give an example of adisease for each of these animals that can be spread to humans, andexplain how to avoid these diseases and still enjoy your pet.

Q: Do the symbols A and a have anything to do with dominance and recessiveness?

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Q: Give some of the reasons that there are no really effective humanvaccines so far for parasitic…

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Q: Outline some of the problems which make malaria diffi cult to control.

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Q: Explain the effect of the virulence factor common to all gramnegativebacteria.

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Q: Briefly outline the zoonotic infections in this chapter, and describehow they are spread to humans.

A: Zoonotic infections are infections that are spread from animals to humans.

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Q: What is a flower? Describe the parts of a typical angiosperm flower

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Q: Explain what exotoxins are, including how they are different from endotoxins in structure, function…

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Q: malaria

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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.