togaviridae · baltimore classification •group iv: (+) sense single-stranded rna viruses. ictv...
TRANSCRIPT
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Togaviridae
VMC 321: Systematic Veterinary VirologyDr Manoj Kumar
Assistant Professor
Department of Veterinary Microbiology
Bihar Animal Sciences University, Patna.
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TogaviridaeVMC 321: Systematic Veterinary Virology
Dr. Manoj KumarMay 03, 2020
Department of Veterinary Microbiology
Bihar Animal Sciences University, Patna.
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Baltimore Classification
• Group IV: (+) sense single-stranded RNA viruses
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ICTV classification
• Family: Togaviridae
• Genus: Alphavirus
• Complex: New World
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Morphology
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Alphaviruses: Protein Function
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Genome organisation
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Viral Genome
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Biological properties
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Replication Cycle
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Disinfectants
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The Viruses
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Equine Encephalitides: Classification and Distribution
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Togaviridae: Replication
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Transmission
(Photo credit: CDC)
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Transmission
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Transmission
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Summary of Equine Encephalitides
Distribution, Magnitude, and Outcomes
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Eastern Equine Encephalitis
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Wild-bird reservoir hosts and incidental hosts
• Wild-bird reservoir hosts and exposure of wild-bird
reservoir hosts causes EEEV
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EEE in Horses
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Clinical signs ofEEE in a horse
Sleepy facial expression,
the lax muzzle, and the
abrasions between the eye
and the base of the ear
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EEE in Birds
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Diagnosis
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Diagnosis
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Western Equine Encephalitis
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Venezuelan Equine Encephalitis
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VEE Viral Strains
• Epizootic/Epidemic
• I-A, I-B, and I-C
• Disease in humans and horses
• Transmission by many mosquito
species
• Natural reservoir unknown
• Horses and donkeys act as
amplifiers
• Enzootic/Endemic
• Disease in humans
• Transmission mainly by Culex
(Melanoconion) species
• Natural reservoir is rodents
living in swamps and forests
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Prevention and Control
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Management ofMosquito-Borne Diseases
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Biological Control
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Chemical Control
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Chemical Control
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ACKNOWLEDGEMENT
The images and part of the content has been taken from www.google.com .The
contributors are duly acknowledged
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Thanks