Dictionary > Indirect life cycle

Indirect life cycle

Definition
noun
A type of parasitic life cycle wherein the parasite is transmitted indirectly from one host to the next, i.e. by requiring a vector or an intermediate host of another species
Supplement
A life cycle refers to the whole life history of an organism, usually depicted through a series of developmental stages in which an organism goes through. It entails the course of development of an organism, i.e. from the time of inception to growth to finally maturity when an organism can viably produce another of its kind. As for the parasites, they have two types of life cycle: (1) direct life cycle and (2) indirect life cycle.
An indirect life cycle is a type of a life cycle wherein a parasite is transmitted from one host to another by using a vector or by an intermediate host of another species. A parasite with an indirect life cycle would therefore require more than one type of host species to complete their life cycle. This is in contrast to a direct life cycle wherein the parasite is transmitted to a new host without requiring a vector or an intermediate species. This parasite would be able to complete its life cycle with only one host species.
In an indirect life cycle, the parasite does not reproduce sexually in an intermediate host although it develops further to another stage (infective stage) of its life cycle.
An example of a parasite with an indirect life cycle is Schistosoma japonicum and Capillaria philippinensis.
Compare:

See also:

  • parasite


  • You will also like...

    Cell Biology
    Cell Biology

    The cell is defined as the fundamental, functional unit of life. Some organisms are comprised of only one cell whereas o..

    The Human Physiology
    The Human Physiology

    Physiology is the study of how living organisms function. Thus, human physiology deals specifically with the physiologic..

    An artistic depiction of a human embryo
    Growth and Development of a Human Baby

    Upon fertilization, a zygote forms and develops into an embryo. This tutorial elaborates on the growth and development f..

    Genetics and Evolution
    Genetics and Evolution

    Humans are diploid creatures. This means that for every chromosome in the body, there is another one to match it. Howeve..

    A chart depicting Mendel's Law of Dominance
    Mendel’s Law & Mendelian Genetics

    One of Mendel’s law of inheritance is the “law of dominance”. Read this tutorial to know more about this form of i..

    Buttress roots
    Roots

    This study guide tackles plant roots in greater detail. It delves into the development of plant roots, the root structur..

    Related Articles...

    No related articles found

    See all Related Topics