Get A Functional Biology of Parasitism: Ecological and PDF

By Gerald W. Esch, Jacqueline C. Fernández (auth.)

ISBN-10: 0412399105

ISBN-13: 9780412399107

ISBN-10: 9401123527

ISBN-13: 9789401123525

Series Editor: Peter Calow, division of Zoology, collage of Sheffield, England the most target of this sequence might be to demonstrate and to give an explanation for the way in which organisms 'make a residing' in nature. on the center of this - their useful biology - is the best way organisms gather after which utilize assets in metabolism, circulation, progress, replica, etc. those methods will shape the basic framework of the entire books within the sequence. each one e-book will be aware of a specific taxon (species, kin, classification or maybe phylum) and may assemble info at the shape, body structure, ecology and evolutionary biology of the gang. the purpose might be not just to explain how organisms paintings, but in addition to contemplate why they've got come to paintings in that manner. by way of focus on taxa that are popular, it really is was hoping that the sequence won't simply illustrate the luck of choice, but in addition express the limitations imposed upon it by means of the physiological, morphological and developmental obstacles of the teams. one other very important function of the sequence could be its organismic orientation. each one ebook will emphasize the significance of practical integration within the day­ to-day lives and the evolution of organisms. this can be the most important due to the fact, even though it can be real that organisms could be regarded as collections of gene­ decided qualities, they however have interaction with their surroundings as built-in wholes and it's during this context that specific qualities were subjected to common choice and feature evolved.

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It constantly moves under the skin causing severe pain and inflammation as it migrates. Man is the wrong host for the parasite at this stage in its life cycle; the parasite should have been in a frog. In the Far East, frog meat is often used as a poultice and direct transfer of plerocercoids from infected frogs to man has also been reported to occur when infected frog flesh is used as a poultice for an open wound on the surface of human skin. There are many host-parasite interactions in which behaviour is modified in such a way that the probability of the host being preyed upon is enhanced.

Some detritivores such as mullet (Mugilidae) also have rich trematode faunas that are acquired as the fish feed on the benthos of estuarine and marine coastal areas, accidentally ingesting metacercariae of the parasites present in the detritus (Paperna and Overstreet, 1981; Fernandez, 1987). Only a few of the external environmental factors known to affect the infrapopulation biology of parasites have been discussed here. It is hoped, Factors affecting parasite populations 37 however, that these examples will serve as an introduction; other factors will be considered more fully in subsequent chapters.

Others suggest that the parasite becomes immunologically 'inert' with the loss of capacity by the parasite to express antigens in its tegumental surface that would be perceived as foreign by the definitive host (Butterworth, 1990). The African trypanosomes alluded to earlier, Trypanosoma rhodesiense and T. gambiense, are haemoftagellates that cause an insidious disease in man known as sleeping sickness (not to be confused with American sleeping sickness that is caused by a virus). In African trypanosomiasis, the host mounts what ostensibly should be an effective immune response via the production of antibodies to a specific antigen coat on the surface of the parasite.

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A Functional Biology of Parasitism: Ecological and evolutionary implications by Gerald W. Esch, Jacqueline C. Fernández (auth.)

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