AdenoViridae Flashcards
Antigenic properties of adenoviruses
- strong antigens
- surface projections (fibers)
- cross reaction with genera (serogroup)
sero group in canine AdenoV important for vaccination
Biological properties of adenovirus
- wide distribution
- diverse pathogenicity
- oncogenic effect
Adenovirus genome and replicating enzyme used
doubles stranded DNA
uses own polymerase enzyme
Which famous canine disease does adenovirus cause?
Rubarths disease (1947)
Infectious canine hepatitis pathogen
CAdV-1
Canine Adeno Virus 1
FOx encephalitis pathogen
CAdV-1
Canine Adeno Virus 1
Occurance of CAdV-1
worldwide
CAdV-1 cause which disease?
Canine infectious hepatitis
fox encaphalitis
CAdV-1 pathogenesis
Intake: PO,conjunctiva
P. Rep: Tonsils, peyer’s patches
Viraemia
Liver,kidneys, eyes (bleu eye D)
brain (fox)
Shedding: urine (up to 6months)
What typoe of hypersensitivity can CAdV-1 cause
Type 3
Peracute clinical signs of CAdV-1
death within 1-2 days
clinical signs of acute CAdV-1
fever over 40° (3-5 dys)
(1-2 wks) oedema, convulsions, uveitis
in which case can the “blue eye disease” occur?
chronic case of CAdV-1
can CAdV-1 cause mucosal haemorrhages, coag problems?
yes
CAdV-1 pathology
- haemorrages
- enlarged, yellow liver
- nuclear inclusion bodies (cowdry A)
- gall bladder oedema
diagnostic method for CAdV-1
- lab test (leucopenia, ALT,AST,ALP, bilirubinuria, DIC)
- direct virus detection (PCR)
- serology (can be positive in case of vaccination so not used)
Prevention of CAdV-1
attenuated (because of sero groups) and inactivated CAdV-1
attenuated CAdV-2
every 2 or 3 years
fox encaphalitis CS, diagnostic & DD
- nerval signs
- PCR
- Rabies, distemper
Canine infectious laryngotracheitis causative agent
CAdV-2
what is Canine infectious laryngotracheitis
mild febrile disease of dogs with upper resp tract inflammation
clinical manifestation of Canine infectious laryngotracheitis in which dogs?
young mainly
Canine infectious laryngotracheitis is part of which disease
kennel cough
CS of Canine infectious laryngotracheitis
mild fever
nasal discharge
dry coughing
Canine infectious laryngotracheitis pathogenesis
air born inf
P . Rep: upper resp mucosa
rhinitis, laryngitis tracheobronchitis, bronchiolitis
Canine infectious laryngotracheitis treatment
symptomatic
Ab for co infections
Canine infectious laryngotracheitis prevention
- avoid crowded environment
- polyvalent vaccines, from 2-3 month
AdenoVirus pneumoenteritis can affect
calves and sheeps and lambs raised intensively
what is AdenoVirus pneumoenteritis in calves
mild disease of 1-4 mO calves, with nasal discharges, coughing and diarrhea
AdenoVirus pneumoenteritis in calves causative agent
- Mastadenovirus genus
- Barthadenovirus
Mastadenovirus replicates where?
bovine kidney
Barthadenovirus replicates where?
bovine testicules
AdenoVirus pneumoenteritis in calves pathogenesis
Intake: PO, airborne
P rep: Multiplication in tonsils
Viraemia
- respiratory & enteric mucosal epithelia
AdenoVirus pneumoenteritis in calves CS age
6-8 wks
or without colostrum: 3-4 wks
AdenoVirus pneumoenteritis in calves CS
- coughing
- salivation
- mild diarrhea
Co infection: pneumonia
BAdV-10
in New Zealand & Norther Ireland
haemorrhagic gastroenteritis, haemorrages in renal cortex, bladder & trachea
AdenoVirus pneumoenteritis in calves diagnostic
PCR
AdenoVirus pneumoenteritis in calves prevention
improve keeping conditions
check colostrum uptake
Adenovirus pneumoenteritis in lambs pathogenesis
same as in calves
Adenovirus pneumoenteritis in lambs CS
mainly resp signs
also haemorraghic-necrotic enteritis(OAdV-4)
Adenovirus pneumoenteritis in lambs frequent complication in rams
urolithiasis
Biotechnologies of adeno Viruses
used as vector to express inserted foreign genes (because big enough)
- rabies vaccine for foxes
- SARS-CoV-2 vaccine for hu
Which diseases are caused by Aviadenovirus genus
- Inclusion body hepatitis
- Hepatitis hydropericardium syndrome
- Quail Bronchitis
- Avian gizzard erosion
Infection of Aviadenovirus
germinative & horizantal infection
Aviadenovirus diagnosis
virus detection
antibody detection
method used for diagnosis of Aviadenovirus
PCR
Inclusion body hepatitis (IBH) susceptible species
chicken, turkey, pigeon & goose
Inclusion body hepatitis (IBH) can be seen with another syndrome
hydropericardium syndrome
Inclusion body hepatitis (IBH) affects mainly which animals
3-6 weeks old broilers
Inclusion body hepatitis (IBH) clinical signs
- anaemia
- diarrhea
weakness, similar to hepatitis, hydropericardium
Inclusion body hepatitis (IBH) histopath
nuclear inclusion bodies
Inclusion body hepatitis (IBH) pathology
liver: enlarged, pale, necrotic foci
heart & skeletal muscle: petechiae
Hepatitis hydropericardium syndrome affects which animal
chicken
(goose, pigeon, duck, quail, ostrich)
Hepatitis hydropericardium syndrome can be seen in which age group
3-6 weeks broilers
Hepatitis hydropericardium syndrome was described first in
Pakistan then india (lychee disease)
Hepatitis hydropericardium syndrome pathology
- hydropericardium
- lung oedema
- enlarged kidney
- pancreas : necrotic foci
- heart skeletal muscl, haemorrhages
Hepatitis hydropericardium syndrome histopathology
nuclear inclusion bodies
Avian gizzard erosion (AGE) affects which animals & what age
Chicken, 3-6 weeks old
(rarely in layers and broiler parent flocks)
Avian gizzard erosion (AGE) clinical signs
- inappatence
- decreased body weight gain & growth of flock is uneven
- anaemia
- decreased egg prod
Avian gizzard erosion (AGE) patho
degenaration of keratin layer of gizzard
haemorrages and ulcers in the mucosal membrane
Avian gizzard erosion (AGE) histopath
nuclear inclusion bodies
Siadenovirus genus diseases
- haemorrhagic enteritis
- avian adenoviral splenomegaly
- marble spleen disease
Haemorrhagic enteritis (HEV) is seen in which animals
turkeys older than 4 weeks
(usually 6-11 week old growers)
Haemorrhagic enteritis (HEV) clinical signs
immunosuppressive!
varaible (no signs but sudden death can appear)
- bloody diarrhea
Haemorrhagic enteritis (HEV) type of infection
horizantal
Haemorrhagic enteritis (HEV) pathogenesis
- po/ fecal
- intestinal epithelial cells
- viraemia
- bursa of fabricus, spleen, blood vessel damage
- haemorrhages; immunusuppression
Haemorrhagic enteritis (HEV) diagnosis
PCR
Elisa
Haemorrhagic enteritis (HEV) DD
- Avian influenza, Newcastle disease
- turkey coronavirus
Haemorrhagic enteritis (HEV) prevention
attenuated, live vaccine
Marble spleen disease (MSD) is seen in which animals
Phaesants, 3-8 months old
Marble spleen disease (MSD) clinical signs
acute resp signs
Marble spleen disease (MSD) pathology
- enlarged, marbled spleen
- lung oedema
(no intestinal lesion)
Avian adenovirus splenomegaly (AAS) general aspects
found in broilers
similar to phaesant disease (not as severe)
patho: liver & spleen enlarged
Barthadenovirus genus disease
egg drop syndrome
Egg drop Syndrome (EDS) causative agent
duck adenovirus
duck/geese: only resp signs
quails: same CS as chickens
Egg drop Syndrome (EDS) type of infection
- Vertical (in the egg)
- Horizantal (with faeces)
Egg drop Syndrome (EDS) pathogenesis
- PO/germinative infection
- rep: in lymphoid tissues & epithelial cells of oviduct/uterus
- serous-mucous secretion, egg shell deformities
- shedding: secretion + faeces in the cloaca
Egg drop Syndrome (EDS) clinical signs
- diarrhea (10-30% of flock)
- decreased egg prod
- soft/thin/pale shelled egg
peak of signs at laying (3-7 weeks)
Egg drop Syndrome (EDS) pathology
no characteristic signs (lesions in the oviduct)
Egg drop Syndrome (EDS) DD
decresed egg prod: avian influenza, newcastle disease
egg shell deformities: infectious bronchitis, avian metapneumovirus
Egg drop Syndrome (EDS) vaccination
inactivated vaccine before laying periode
(yolk immunity –> lower number of infected bird via verticle route)
EDS in gosling
Acute respiratory disease
rarely clinical signs
Acute respiratory disease in gosling caused by EDS
patho
rhinitis, tracheobronchitis