E2 Gram Positive Bacilli Flashcards Preview

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Flashcards in E2 Gram Positive Bacilli Deck (33)
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1

What is unique about gram positive bacilli?

Form spores!

2

What environmental conditions favor Bacillus anthracis?

High nitrogen areas
Periodic flooding

3

What is unique about visualizing the cultures of Bacillus anthracis?

Basically non-hemolytic
Colonies have irregular edges

4

Does Bacillus anthracis for spores in the presence of oxygen? What does this mean for veterinarians?

Yes.
Do NOT open carcasses

5

How long can Bacillus anthracis spores survive?

More than 100 years!

6

What types of animals are most susceptible to anthrax and which are most resistant?

Herbivores are most susceptible
Carnivores are resistant
Humans are moderately susceptible

7

What is the most common route of Bacillus anthracis infection in ruminants?

Ingestion or inhalation

8

Why is anthrax so deadly?

Produces several toxins
1. Protective antigen
2. Edema factor
3. Lethal toxin

9

What is the disease name for cutaneous Bacillus anthracis infection?

Wool sorter's disease

10

What is the cause of death in animals with Bacillus anthracis infections?

Toxins induce vascular collapse

11

What is positive about Bacillus anthracis infections?

It is easy to treat with antibiotics

12

What is unique about carcasses infected with Bacillus anthracis?

No rigor mortis
Blood does not clot

13

Is there a vaccine for Bacillus anthracis?

Yes
(but only 6 months protection)

14

Can you get a Bacillus anthracis infection from eating meat from an infected animal?

Yes!

15

What is the usual disease caused by Bacillus cereus?

Food poisoning
Esp sugar beet pulp in pigs

16

Can healthy animals carry Listeria monocytogenes bacteria?

Yes

17

What is unique about Listeria monocytogenes bacteria?

Do NOT form spores

18

What type of disease does Listeria monocytogenes cause?

Food poisoning

19

What cells does Listeria monocytogenes infect?

Macrophages
Hepatocytes

20

What are some severe outcomes of Listeria monocytogenes infection?

CNS infection
Abortions

21

What is the major source for Human exposure to Listeria monocytogenes?

Turkeys
(liver necrosis)

22

What are the two types of Listeria monocytogenes infection?

1. Visceral form = injection or inhalation
2. Neural form = conjunctive or trigeminal nerve

23

What disease does the neural form of Listeria monocytogenes cause?

"Circling disease"
Cattle & sheep

24

What is Erysipelothrix rhusiopathiae?

Affects turkeys & pigs
Present in 50% of normal pigs

25

What disease does Erysipelothrix rhusiopathiae cause?

"Diamond skin disease" in pigs
"Blue comb" in Turkeys
Can be ZOONOTIC but localized

26

Is there a vaccine for Erysipelothrix rhusiopathiae?

Yes for pigs

27

What is Rhodococcus equi?

Commensal of tonsils of grazing animals
Cause of fatal suppurative bronchopneumonia in foals
Very antibiotic resistant

28

How is Rhodococcus equi diagnosed?

See bacteria in tracheal wash

29

What is Corynebacterium?

Common skin commensal
Sheep & goats

30

What is Corynebacterium pseudotuberculosis?

Causes caseous lymphadenitis = sheep & goats
Ulcerative lymphangitis = cattle & horses
"Contagious acne"