LEC 19 - Rabies + VSV Flashcards
What is seen upon PE in a ferret with rabies?
Torticollis
Dehydration
pale MM
Normal Temp
Weak pulse
What are the non-infectious differientials for rabies?
Dehydration
Abdominal FB
Toxin
HBC
What is the infectious differiential for rabies?
CDV
What is submitted for rabies testing?
Head, chilled NOT FROZEN
What is done to test for rabies?
FA
Impression of:
- Midbrain
- Cerebellum
- Hippocampus
What is the pre-exposure protocal for rabies prophylaxis?
3 vaccine series
What is the post-exposure prophylaxis protocol?
Peripheral immunoglobulin injections
5 day booster vaccinations
At what day are the rabies booster vaccinations given for post-exposure?
0
3
7
14
28
What is the genomic charactersitics of Rabies?
Linear
(-) ssRNA
How do rhabdoviruses enter the host cell?
G protein attaches to host receptors
Endocytosis
Vesicle fusion
Release into cytoplasm
mRNA transcription + replication
Virion formation
Budding
What are the four groups in the rhabdovirus family?
Lyssa
Vesiculo
Ephemero
Novirrhabdo
What are the two types of rabies?
Urban
Sylvatic
What rabies type is most commonly seen today?
Sylvatic
What are teh peripheral targets of rabies?
Salivary glands
Eye
Skin
How does rabies pass through the body?
Peripheral exposure
Infection of nerve endings
Retrograde axonal transport to dorsal ganglion
Dissemination throughout CNS
What are the four factors affected incubation period?
Host species
Virus strain
Dose exposure
Exposure site
What is the general incubation peroid of rabies?
3 to 12 weeks
What is the rate limiting step of rabies transmission?
Axonal transport
Longer the axon the longer it takes for rabies to spread
What are the non-infectious differentials for a hypersalivating, anorexic cow?
Ketosis
FB
Toxicity
Trace mineral deficency
What are the infectious causes of hypersalivation, anorexia in cows? (6)
Listeria
BVDV
BSE
Histophilus
Rabies
Pseudorabies
What are the progressive neurological signs with rabies in a cow?
Stargzing
Ataxia
Difficulty rising
What is seen upon histological examination of a rabies + cow?
Intraneuronal inclusion bodies
What are the four types of clincal signs seen in rabies infections?
Predormal
Prodromal
Furious
Dumb
Describe Dumb clinical signs of rabies
Weakness
Salivation
Difficult swallowing
Describe furious clnical signs of rabies virus infection
Aggression
Hyperexcitability
Roaming
Cats > Dogs
How is a diagnosis made for rabies virus?
Euthanasia
or 10d isolation after early signs (ie bite)
What pathology is seen histologically with rabies?
Non-suppurative encephalitis
Perivascular lymphoid cuffing
Intracytoplasmic IB
What prevention is avalible for rabies?
Killed vaccine
Given at 8 weeks - 1 yr
What is the milwaukee protocol?
Induced coma = ketamine + midazolam
Antivirals = Amantadine
Rabies transmitted to humans most commonly via….
Dogs
What is the post exposure protocol in vaccinated animals exposed to rabies?
Booster
Outpatient monitoring for 45 days
What is the rabies post-exposure protocol for an un-vaccinated animals?
EUTHANIZE
or
Long-term inpatient monitoring (6 months)
Vaccination
What are the non-infectious differientials for oral blisters in a horse?
Toxin
Oral trauma
What are the infectious differientials for oral blisters in a horse?
Vesticular stomatitis
What is the diagnostic plan for oral blisters in a horse?
REPORTABLE
Serology
rtPCR
What are the vectors for VSV?
Block flies
Sand flies
Culicoides
What are the mechanical vectors of VSV?
Vets
Feed/H2O
What are the two major serogroups of VSV?
Indinana
New Jersey
What are the animals affected by VSV?
HORSES
Cattle
Pigs
Camelids
Ruminants
Humans
What are the infected tissues of VSV?
Oral mucosa
Mammary glands
Coronary bands
Interdigital spaces
What is the incubation peroid of VSV?
3 to 5 days
What is the recovery period of VSV?
2 weeks
What are the common clinical signs of VSV?
Vesicular lesions on tongue + oral cavity
Hypersalivation + secondary infections
Fever
Coronary band lesion = lameness
Teat lesions = mastitis
What diagnostics can be done with VSV?
Serology
Virus isolation
rtPCR
What must happen during the collection of possible VSV samples?
Must be collected/submitted by state or federal vet
What is the quarantine period for animals with VSV?
30 days since last suspected case
What is the treatment for VSV?
Palliative
Focus on secondary infections
Insect management
How has VSV been used as a medical tool?
Vaccine development
Cancer therapy
Gene therapy - PD