Nursery 2 : DZ Flashcards
PRRS is caused by what virus
arterivirus
lung characteristic for PRRS
diffused intersittial pneumonia
slight rubbery not consolidated
what stages of PRRS: end of shedding, cleared
extinction
what stages of PRRS: sublicnical, decreased shedding
persistence
what stages of PRRS: viremia,
acute
how many DPI Chronic persistent PRRS infection: persistent infection wherein the virus is eventually cleared
100-145
where do PRRS replicate
Macrophage, lymphoid tissue
PRRS Characteristic lesion
interstitial pneumonia + lymph node enlargement
prevention and control for PRRS
herd closure for 26 wks
partial depopulation
Lesions are concentrated on the apical
portions of the lung
mycoplasma pneumoniae
CA of swine mycoplasma
Mycoplasma hyopneumoniae
Mycoplasma infect and reproduce in/around
resp villi
Porcine Pleuropneumonia/ APP infection CA
Actinobacillus/haemophilus pleuropneumoniae,
Causes fatal fibrino-hemorrhagic and necrotizing pleuropneumonia; lung hemorrhaging, fibrinous exudation
Porcine Pleuropneumonia/ APP infection
causes locally extensive dorsal diaphragmatic pneumonia
APP
virulence toxin factors of APP
RTX and Apx toxins
drugs for APP infections
enrofloxacin, tiamulin, lincomycin, tilmicosin
swine influenza is zoonotic
t
Influenza viruses have a wide range of hosts
t
IAV subtypes are defined by their ___) and __
Hemagglutinin (H1-18)
Neuraminidase (N1-10) glycoproteins
affects upper and lower respiratory tract of human and swine
human-type receptor
found in the lungs of both species
avian‐type receptor
where do swine influenza replicates
epithelial cells of the upper and lower respiratory tract of pigs
swine influenza has high morb and mort
false. morb only
Swine influenza virus excretion and transmission occur exclusively via the
respiratory route
rotavirus species reported in swine
a,b,c
how many species of rotavirus are there?
10
rotavirus can be involved in enteritis during the first ___ of life
5 wks
The sow can be the source of rotavirus; upon depletion of protective IgM in milk clinical infection
IgA
where do rotavirus replicates
small intestinal proximal villi, resulting in villous blunting and atrophy
what do RV targets
epithelial cells of the small intestinal jejunal and ileal tissues;
IP of RV
24-48 hr incubation period
rotavirus can be shed in feces
true
established enteric pathogens of sucklings
Clostridium perfringens type C
C. difficile
cause of enteritis in other mammals
C. perfringens type A:
divided into 7 toxino- types (A to G) based on the production of 6 major toxins
c. perfringens
main virulence factor of C. perfringens type C
CPB toxin
Piglets develop hemorrhagic diarrhea 8–22hours after exposure to this
Clostridium perfringens/difficile
drugs for Clostridium perfringens/difficile
toxoid antibiotics (e.g. penicillin, ceftiofur)
enteric infection syndromes
neonatal hemorrhagic and necrotic enteritis
necrotizing enteritis
necrotizing necrotic enterityphlocolitis
histotoxic infection syndrome
gas gangrene
neurotoxic infection syndrome
blackleg
tetanus
botulism
