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Microbiology > Mycoplasmas of Swine > Flashcards

Mycoplasmas of Swine Flashcards

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Biology 101 flashcards
1
Q

What are the common Mycoplasmas of swine?

A

Mycoplasma hyopneumoniae, Mycoplasma hyorhinis, Mycoplasma synoviae, Mycoplasma suis, and Mycoplasma flocculare

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2
Q

What does Mycoplamsa hyopneumoniae cause?

A

mycoplasmal pneumonia of swine (enzootic pneumonia)

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3
Q

What complex is enzootic pneumonia a part of?

A

Porcine Respiratory Disease Complex (PRDC)

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4
Q

How is Mycoplasma hyopneumoniae transmitted?

A

contact and aerosol

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5
Q

What swine population is Mycoplasma hypneumoniae especially prevalent in?

A

confinement-reared swine

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6
Q

What are the characteristic lesions associated with Mycoplasma hyopneumoniae?

A

peribronchiolar and perivascular infiltration by lymphocytes

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7
Q

How is Mycoplasma hyopneumoniae immunosuppresive?

A

it damages ciliated tracheal epithelium

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8
Q

What is the specific morphology of virulent strains of Mycoplasma hyopneumoniae?

A

they have a thicker surface composed of a polysaccharide

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9
Q

What are the co-infections associated with Mycoplasma hyopneumoniae?

A

Pasteurella multocida, Actinobacillus pleuropneumoniae, Actinobacillus suis, Streptococcus suis, and Salmonella choleraesuis

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10
Q

How is Mycoplasma hyopneumoniae prevented?

A

with vaccines and improvement of management

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11
Q

How is Mycoplasma hyopneumoniae eradicated?

A

a combination of immunization, herd closire, antibiotic treatment, and biosecurity measures

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12
Q

Are antibiotics helpful in treating Mycoplasma hyopneumoniae?

A

yes but if the damage is already done they do not

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13
Q

What does Mycoplasma hyorhinis cause?

A

sporadic polyserositis in young pigs and eustachitis and otitis media in young pigs in Japan

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14
Q

In normal swine, where is Mycoplasma hyorhinis found?

A

in the upper respiratory tract

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15
Q

What can make swine susceptible to Mycoplasma hyorhinis?

A

stress such as anemia, respiratory or enteric disease, and PRRS

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16
Q

Is there a vaccine for Mycoplasma hyorhinis?

A

yes, it is called MycoMAX

17
Q

What does Mycoplasma hyosynoviae cause?

A

polyarthritis in growing and finishing swine

18
Q

Mycoplasma hyosynoviae is carried in the _____ of a high percentage of adults and convalescent swine for a long time?

A

tonsils

19
Q

How is Mycoplasma hyosynoviae transmitted?

A

from the sow to the piglets and then among penmates

20
Q

What is thought to be predisposing to overt disease associated with Mycoplasma hyosynoviae?

A

stress such as osteochondrosis

21
Q

Is there a vaccine for Mycoplasma hyosynoviae?

A

no

22
Q

What is Mycoplasma suis the cause of?

A

eperythrozoonosis

23
Q

What is eperythrozoonosis associated with?

A

stress

24
Q

How is Mycoplasma suis transmitted?

A

by hog louse, mosquitos, and flies as well as in-utero and oral transmission

25
Q

What is the pathogenesis of Mycoplasma suis?

A

the organism attacks red cells and the damaged cells are cleared eventually resulting in anemia

26
Q

What clinical signs do pigs under 5 days of Age that are infected with Mycoplasma suis exhibit?

A

skin pallor and icterus - some recover but show signs of anemia and general unthriftiness

27
Q

What are acute clinical signs of a Mycoplasma suis infection?

A

anorexia and fever for a few days at farrowingor at weaning

28
Q

What are chronic clinical signs of Mycoplasma suis infection?

A

infected animals may be anemic and exhibit decreased reproductive function

29
Q

What is a common result of secondary infection of Mycoplasma suis?

A

DEATHHHHHH

30
Q

How is Mycoplasma suis diagnosed in acute cases?

A

blood smears of febrile pigs

31
Q

How are subclinical cases of Mycoplasma suis diagnosed?

A

with an indirect hemagglutination test that has been developed to detect serum antibody

32
Q

Is there approved treatment for Mycoplasma suis infections?

A

no

33
Q

How can the spread of Mycoplasma suis be controlled?

A

by controlling lice and mange and by using individual needles and instruments or by disinfecting instruments between animals

34
Q

What can be used to prevent some anemia caused by Mycoplasma Suis?

A

Iron-dextran injections

35
Q

Is Mycoplasma flocculare pathogenic?

A

no

36
Q

Why is Mycoplasma flocculare a problem?

A

because it is very similar to hyopneumoniae and is very common so it is hard to differentiate between the two

Microbiology (50 decks)

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