Chapter 14- Structure And Classification Of Animal Viruses

Front 1

Taxonomic Criteria Based On:

Back 1

1. Genomic, Virus Particle, Presence or Absence of Envelope

Front 2

Enteric Viruses

Back 2

Transmitted via fecal-oral route
cause gastroenteritis

Front 3

Respiratory Viruses

Back 3

-usually inhaled via infected respiratory droplets
-generally remain localized in respiratory tract

Front 4

Zoonotic Viruses

Back 4

Transmitted from animal ot human via animal vector

Front 5

Sexually Transmitted virus

Back 5

can cause lesions on genitallia or cause systemic infections

Front 6

Properties of Acute Infections (4)

Back 6

-Short in Duration
-Host may develop long lasting immunity
-Result in Productive infections
-Disease symptoms result from tissue damage and infection of new cells

Front 7

Three Categories of Persistent Virus Infections

Back 7

-Latent Infections
-Chronic Infections
-Slow Infections

Front 8

Latent Infections

Back 8

-Infection followed by symptom less period followed by reactivation
-Herpes simplex viruses 1 and 2, chicken pox

Front 9

Chronic Infections

Back 9

-Infectious virus can be detected at all times
-Disease symptoms may be present or absent during extended times or may develop late
-Well known example: Hepatitis B

Front 10

Slow Infections

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-Infectious agent gradually increases in amount over long period of time
-No significant symptoms appear during this time
-Retroviruses (HIV) and Prions

Front 11

Viral Genome

Back 11

Contains genes essential to viral survival
-encode enzymes and structural protiens
-must be replicated to form new virions

Front 12

Provirus

Back 12

DNA tumor viruses interact with host DNA

Front 13

Ocogene-

Back 13

gene malfuntion that leads to loss of cell cycole control

Front 14

2 DNA viruses known to cause cancer

Back 14

-human papillomavirses (HPV)
-herpes viruses

Front 15

RNA viruses

Back 15

- Human T-cell lymphotrophic virus (HTlv)- leukemia
-HIV