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Virology > Quiz 2 Ruminants Resp and Gastro > Flashcards

Quiz 2 Ruminants Resp and Gastro Flashcards

1
Q

Genus and Family for Parainfluenza 3 infection?

A

Respirovirus

Paramyxoviridae

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2
Q

How does Parainfluenza 3 look like under the microscope?

A

Syncytiums and Intracytoplasmatic inclusion bodies

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3
Q

What are some causes of Shipping Fever?

A

Parainfluenza 3 Infection

Bovine Respiratory Syncytial Disease

IBR

Adenovirus

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4
Q

C/S of Parainfluenza 3?

A 
Fever
Lacrimation
Serous nasal discharge
Depression
Dyspnea
Coughing

Shipping fever

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5
Q

Dx of Parainfluenza?

A

its difficult bc its asymptomatic or very mild symptoms

IF
ELISA
of nasal discharges

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6
Q

How is Parainfluenza transmitted?

A

Aerosals and fomites contaminated with nasal discharges

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7
Q

Vacc for Parainfluenza?

A

Several attenuated vacc for intranasal

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8
Q

Whend should you give the vacc for Parainfluenza?

A

If you planning for transport, give a few days before so they have enough time to produce an immune response

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9
Q

Pneumovirus

Paramyxoviridae

A

Bovine Respiratory Syncytial Dz

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10
Q

What is the morb and mort for Syncytial dz?

A

High morbidity

Low mortality

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11
Q

What dz can seroconversion is short lived, and reinfection can occur?

A

Bovine Resp Syncytial Dz

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12
Q

Dx of Syncytial Dz

A

Difficult

IF from lung lavage or necropsy, serology on paired samples are difficult to interpret.

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13
Q

How can you control Syncytial Dz?

A

new mucosal vacc

More common in winter, spreads rapidly by aerosals, probably existence of carriers.

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14
Q

Bovine Herpesvirus 1

Herpesviridae

A

IBR

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15
Q

IBR C/S

A 
Rhinotracheitis
Pustular Vaginitis
Balanopothitis
Conjunctivitis
Abortion
Enteritis
Generalized dz in calves and possilby Encephalitis.
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16
Q

What its important to remember about that long list of C/S for IBR

A

These c/s rarely present in the same herd at the same time

17
Q

If a cow is presenting with Fetid breath, dypsnea, mouth breaking, salivation, and a deep bronchial cough?

A

IBR

18
Q

When does abortion occur in IBR

A

can occur at 4-7 mo gestation

RARE though

19
Q

Lesions on aborted fetuses look like?

A

No gross lesions

Microscopically necrotic foci mainly on the liver

20
Q

Dx of IBR?

A

EM

IF

PCR

21
Q

Control of IBR?

A

Major importance in feedlots.

Think about shipping fever–stressful situations

try to keep everyone stress free

22
Q

IBR, does it have vacc?

A

Yes! Do not prevent infection, but reduce incidence and severity of dz

DIVA

23
Q

Grp A _____ from the Reoviridae

A

Rotavirus

24
Q

Genome of Rotavirus

A

RNA, Segmented,
Naked

Reassortment occurs

25
Q

White scours/Milk Scours?

A

Rotavirus gastroenteritis

26
Q

Transmission ofRotavirus?

A

Fecal Oral

27
Q

When can calves become infected with rotavirus?

A

First couple of weeks post birth

28
Q

CS of rotavirus

A

Moderately depressed but will continue to eat

Feces are voluminous, soft to liquid and often contain large amounts of mucus

29
Q

Whats important to remember about young if they get rotavirus?

A

They can die from dehydration but most will recover in 3-4 days

30
Q

What part of the villi does rotavirus effect?

A

Top of the villi-they become shortened with cuboidal cells which will secrete less lactase and are less able to carry out glucose couple sodium transport

The undigestd lactose in milk cause bacterial overgrowth and has osmotic effect both contributing to further diarrhea

31
Q

Dx of Rotavirus?

A

Clinical Presentation

Definite with EM, ELISA, RT-PCR

32
Q

Controlling Rotavirus

A

Excreted in feces a high numbers and resistant in the environment

You want local immunity in the SI

33
Q

Vacc for rotavirus?

A

Vacc mother with inactivated virus vacc promotes higher levels of maternal Ab in colostrum and milk

34
Q

Winter dysentery?

A

Coronavirus

35
Q

Coronavirus or Rotavirus can cause diarrhea in humans?

A

Corona

36
Q

When can dz of calves been seen with Corona?

A

1 wk old when the maternal Ab begin to wane off

37
Q

When do you vacc for corona?

A

Vacc dam to provide high levels of maternal Ab in colostrum or use colostrum from donors that are hyperimmunized

Virology (4 decks)

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