Veterinary Parasitology Fourth Edition

 In this post you can download pdf of Textbook of Veterinary Parasitology Fourth Edition from here

Based on previous editions of Veterinary Parasitology, this fourth edition has been further developed into a two-part reference text with enhanced and updated parasite taxonomic classification systems. 
Part 1 contains expanded individual parasite descriptions and taxonomic status within three new chapters on Veterinary helminthology (Chapter 1), Veterinary protozoology (Chapter 2) and
Veterinary entomology (Chapter 3). As with previous editions of Veterinary Parasitology, further updated chapters include Laboratory diagnosis of parasitism (Chapter 4), Antiparasitics (Chapter 5),
The epidemiology of parasitic diseases (Chapter 6) and Host resistance to parasitic diseases (Chapter 7). Host species chapters have been retained and updated and are now in Part 2 of the edition.  Additional information on non-obligate ectoparasites that may be found on several hosts are grouped in a separate chapter, Facultative parasites and arthropod vectors (Chapter 17). In agreement with the third edition of Veterinary Parasitology, complete indexing cross-references are included in this edition.
There are several slightly different definitions of parasitism and parasites. For the purposes of this book, parasites are considered: organisms that spend a large part of their life in (endoparasites) or on (ectoparasites) another type organism, the host. Ectoparasites are also often vectors of pathogens that can cause disease. Parasites depend on it host and benefit from the association, at the expense of the host. She Get nutrition from the host and there may be other benefits As a protected habitat where it grows and reproduces. Parasites They are usually harmful to their host, although this is not always the case It is easily detectable because a single parasite cannot produce a detectable parasite صدمه. The disease is often a demographic phenomenon, With a small number of parasites that have no detectable effect, but Many causes of subclinical injury effects on The debilitating damage of the fatal disease to the host can also be caused by: Host defense mechanisms respond to the presence of parasites.
Many parasites are completely dependent on a particular host or host To complete their life cycle and survive and these creatures They are known as the obligate parasites of that particular host. or
Creatures cannot survive independently or complete their lifecycles. There may be a host, or parasitic, then it is called option helminth. for several reasons Parasites settle on a host other than the final host And they cannot complete their normal life cycle. these are A host is called an accidental host, and in case of a common infection Parasites important to veterinarians. Humans are an example. Each parasite must have at least one host in its lifecycle. Many species have multiple hosts. host with parasites optimal and develop into adulthood or sexually The stages of maturation and regeneration are known as critical primary stages or end host. If there is only a single host in the life cycle, then transmission is said to be direct and the parasite to have a direct life cycle. Many parasites have more complex life cycles with additional hosts in which essential development to a new parasite stage occurs. These stages either do not reproduce or if they do then it is
by asexual multiplication. These hosts are known as intermediate or transitional hosts. Some of these hosts can also be vectors (such as ticks, mosquitoes), which carry and spread disease-causing parasites from one host to another. These life cycles Hosts are known as indirect or complex life cycles. There is Some parasites that use additional hosts to overcome adverse environments It increases the condition or likelihood of parasites It will be forwarded to the last host. No further development Parasites on this host. They are known as partners Or transport host.

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