NATS 1670 Lecture Notes - Cell Surface Receptor, Rna Virus, Dna Replication

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Viruses are highly diverse in overall morphology & in the nature of their genetic material. Do not cross eukaryote / prokaryote boundary. Cell surface receptor ex- polio can only affect human beings most important part of specific relationship viruses to host (who/what is receptive to virus) Availability of replication machinery - herpes - can replicate because is coming with own enzyme has the ability to cross certain boundaries, use cell to replicate virus (ability of virus to replicate) When u feel sick after being infected with a virus; flue, it means your interference system is working. Zoonotic viruses pursue their biological cycles chiefly in animals. Humans are secondary or accidental hosts - if affect human just happen to be at the wrong environment which normally we are not in. These viruses are limited to areas and environments" able to support their nonhuman natural cycles of infection. Limited to certain parts of the environment : vertebrates or arthropods or both.

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