Grower part 1

Question 1

ASF causatuve agent

first described in this country in 1921 from diseased ___ pig breeds

clinical signs:

Answer 1

Asfivirus

Kenya, European

high fever, hemorrhaging, and mortality

Question 2

wild boars affected with ASF exhibit severe clinical signs t/f

Answer 2

F - apparently immune to clinical dz

Question 3

acute
subacute
chronic
mortality rate &

recovered animals become ___ and shed the virus

Answer 3

100,70, less than 70, carrier

Question 4

diseases imported to europe in 1957 (__ and ___) eventually rampaged its way to europe and asia

Answer 4

spain and portugal

Question 5

ASF 3 cycles

ASF transmission

Answer 5

● Sylvatic cycle- involves tick vectors
● Domestic cycle- involves
transmission between
domesticated swine
● Wild Boar cycle- involves wild boar
and bush pigs as reservoir

tick vectors, fomites,
humans, flies; viral shedding through all
bodily fluids and direct contac

Question 6

Viral replication leads
to (ASF)

Answer 6

o immunosuppression, excessive
cellular destruction

Hemorhhaging on skin
Smell of death
Smell of blood clot, epistaxis,
Fresh blood on walls
Urine, blood tinged

Question 7

in ASF in the phils, killing of infected pigs are preferred vs in culling of infected herds in other countries. t/f

country that created a vaccine for ASF

Answer 7

f - phils = cull
other country = clinically infected

Vietnam

Question 8

what dz
1998-1999: outbreak of lethal
_____in Malaysian swine
husbandry personnel: __%
mortality

Answer 8

encephalitis
40%
NIPA

Question 9

NIPAH signs in swine

Answer 9

respiratory signs, epistaxis,
dyspnea, neurological signs

Question 10

where did the nipah vius came from

NIpah other term

Answer 10

infected bats

Barking Pig syndrome/hendra

Question 11

nipah virus can also infect cats t/f

Answer 11

t

Question 12

in swine, ___ and ___ penumoina with hyperplasia of aiat epithelium (NIPAH)

in humans ___ with endothelial cell damage, necrosis and ___ cells in blood vessels; abdundant viral antigen present in capillary epithelium

Answer 12

tracheitis, broncho-interstitial

vasculitis, syncytial giant

Question 13

unique test for NIPAH

Answer 13

IF test

Question 14

RESTv infexn
1989-1990s
2009:
2014: reported in

RESTv (_____) not known to
infect humans;

______
viruses might jump to swine

Answer 14

❏ 1989-1990s: Philippine monkeys
(Reston, Virginia; Italy)
❏ 2009: Philippine swine; PRRS and
PCV2-positive; tested positive for
RESTv; farm personnel seropositive
❏ 2014: reported in China
❏ RESTv (filovirus) not known to
infect humans; African Ebola
viruses might jump to swine

Question 15

genus

Answer 15

Genus Ebolavirus: Reston
ebolavirus, Bundibugyo ebolavirus,
Sudan ebolavirus, Zaire ebolavirus,
Taϊ forest ebolavirus

Question 16

❏ 2013-2016: oubreak

Answer 16

Zaire Ebolavirus (EBOv)
outbreak in West Africa

*EBOv in swine: occurs under
experimental conditions
(respiratory

Question 17

Highest viral levels in the lung and lymphoid tissues; also detectable in
muscle

Answer 17

Reston Ebola Virus (RESTv) Infection

Question 18

RESTv: ______ in the submandibular, retropharyngeal, and bronchial lymph
nodes; lung consolidation can occur

Answer 18

❏ Lesions confined to the lymphoid and respiratory systems; Lymphadenomegaly

Question 19

❏ Mild acute ______ may occur and focal necrosis of ______ epithelium
may occur (associated with neutrophil infiltration)

Answer 19

❏ Mild acute rhinitis may occur and focal necrosis of tonsillar epithelium
may occur (associated with neutrophil infiltration)

Question 20

REstV: no gross or histologic abnormalities detectable

Answer 20

28 DPI

Question 21

Caused by:
* poor ventilation
* poor hygiene
* poor environmental management
❏ Ammonia is a corrosive and irritant
gas
❏ Prolonged exposure can damage the
respiratory tract (≥ 15 PPM)
❏ Can predispose the animal to
pathogenic infections

Answer 21

ammonia build up

Question 22

Prevention and control
❏ Ensure optimal air movement
❏ The facility should allow for
optimal ventilation
❏ Improve the overall environmental
condition

Answer 22

coventional house

Question 23

Sensors continuously monitor the
environmental conditions
❏ The computer adjusts
accordingly, mainly the fan speed
❏ The computer handles everything

Answer 23

Tunnel Ventilation, CCS
(Automatic

Question 24

Virus has an affinity to the brain system = neurologic signs
severe dysfunction of brain stem neurons (tropism to the ephrin-B3 receptor)

Answer 24

nipah

Question 25

what does it mean
-Minimum volume of air
that must be exchanged in order to maintain
optimal temperature and gas levels
CFM
RFC
Variable speed fan =

Answer 25

❏ Minimum Ventilation -Minimum volume of air
that must be exchanged in order to maintain
optimal temperature and gas levels
❏ CFM - Cubic feet per minute -Unit of measure
for air volume moved w/n 1 min
❏ RFC - Rated fan capacity, the maximum CFM a
fan can handle (e.g. 3,600 CFM)
❏ Variable speed fans - the output can be set (e.g.
10%, 25%, 50%, 75%, 100% etc)

Question 26

❏ Bites on the tail stump and other
areas
❏ Wounds may be deep enough to
cause bleeding

❏ Usually caused by salt deficiency
❏ May also be due to large individuals
picking on the small ones/runts

Answer 26

Cannibalism, fighting