40. Infectious central nervous diseases Flashcards
Viral CNS diseases
Canine Distemper
Rabies
Pseudorabies
Feline Borna Disease
Tick encephalitis
FIP
FIV
Canine Herpes
Feline Parvo
WNV
Canine Distemper virus name
Morbilivirus - paramyxoviridae
Clinical signs of Canine Distemper
(polysystemic signs)
Apathy
Mucopurulent discharge
Hyperkeratosis
DIarrhoea
Cough
Fever
Clinical signs of Canine Distemper
(neurological signs )
Brainstem signs
Cerebellar signs
Seizures
Circling
Myoclonus
Hyperkinesia
Ataxia
Menace deficit
VIsual impairement
Head depressing
Diagnosis of Canine Distemper
PCR urine
Conjunctival / bronchial smear- – inclusion bodies
IF test
Rabies virus name
Lyssavirus - rhabdoviridae
ZOOTNOTIC
Infection of Rabies
Transdermal Inoculation via wounds
Infectious material in contact with mucosa/ skin lesions
Virus cannot penetrate intact skin
Incubation of Rabies
2-3months
Pathophy of Rabies
Virus —> cns via retrograde axoplasmic transport
replication –> pathological effect on nerve cells
peripheral nerves –> adjacent non nervous tissue
dissemination throughout body
Clinical signs of Rabies
initially
Not eating or drinking
vomitus
anorexia
lethargy
fever
Clinical signs of Rabies
later
Cranial nerve dysfunction
weakenss
dyspnoea
abnormal behaviour
excessive salivation
ataxia
paralysis
seizures
dysphagia
aggression
Forms of Rabies
Furious and paralytic
Death in case of Rabies
Within 6 days of clinical signs
Diagnosis of Rabies
PM only
Brain histology is NB - inclusion bodies, inflammation
Differential of Rabies
Pseudorabies
another name for Pseudorabies
Aujeszky’s disease
Pseudorabies virus name
Varicellovirus - herpesviridae
Incubation of Pseudorabies
3-6days
Clinical signs of Pseudorabies
Ptyalism
restlessness
anorexia
vomiting
fever
incoordination
furious scratching
muscle spasms
rubbing
vocalisation
self mutilation
diagnosis of Pseudorabies
history
clinical signs
course
Prognosis of Pseudorabies
Bad
usually leads to death
Feline Borna Disease virus name
Orthobornavirus - - -bornaviridae
another name for Feline Borna Disease
staggering disease
non suppurative meningoencephalomyelitis
Transmission of Feline Borna Disease
Not readily transmitted
ticks are vectors
shrew act as reservoir host
Clinical signs of Feline Borna Disease
gait disturbance
ataxia
pain in lower back
behavioural changes
Diagnosis of Feline Borna Disease
RT - PCR
Tick encephalitis virus name
flavirus - - flaviviridae
Clinical signs of Tick encephalitis
Convulsions
Strbismus
Excitement
facial paralysis
Proprioceptive disorders
aggression
sensation disorder
anisocoria
fever
apathy
ataxia
paraplegia
tremor
nystagmus
mydriasis
Lab d of Tick encephalitis
Leukopenia
Lymphopenia
monocytosis
Treatment of Tick encephalitis
symptomatic
FIP virus name
alphacoronavirus —- coronaviridae
What is FIP associated with
dry granulomatous FIP
immune complex vasculitis
What structures does FIP affect
primary intracranial and spinal cord
Clinical signs of FIP
- Motoric disorder
- Tremor
- Cerebellar ataxia
- Stupor
- HL paralysis
- Dementia
- Aggressiveness
- Mydriasis
- Nystagmus
- Anisocoria
- Anterior uveitis
- Chorioretinitis
How is the CNS protected from bacteria
BBB
Aetiology of Bacterial CNS diseases
direct invasion
local source invasion
haematogenous invasion
General clinical signs of Bacterial CNS diseases
Cervical hyperaesthesia
altered mental state
imbalance
paralysis
fever
ataxia
paresis
Diagnosis of Bacterial CNS diseases
CSF examination
Treatment of Bacterial CNS diseases
AB - ampicillin, enrofloxacin, metronidazole
GCC
Listeria monocytogenesis invasion via
oral mucosa lesions
Clinical signs of listeria
laryngeal paralysis
vestibular signs
circling
ataxia
Treatment of listeria
doxycyclin
Protozoal CNS diseases
Toxoplasma gondii
neospora caninum
Toxoplasma gondii
host
cat
Clinical signs of Toxoplasma gondii
Lethargy
penumonia
hyperextended HL
anorexia
lethargy
CNS signs
Toxoplasma gondii inflammation
encephalitis
myelitis
peripheral neuropathies
myositis
neospora caninum host
dog
Transmission of neospora caninum
can be vertial in uterus
neospora caninum inflammation
encephalitis
myelitis
peripheral neuropathies
choriomeningitis
myositis
Treatment of neospora caninum
Clindamycin
potentiated sulphonamides
Fungal CNS diseases
Cryptococcus
coccidioides
blastomyces
histoplasma
aspregillus
Diagnosis of Fungal CNS diseases
CSF
treatment of Fungal CNS diseases
Fluconazole
Flucytosine
must cross BBB