Flashcards in E2 Family Spirochetaceae Deck (42)
What is the gram reaction of the family Spirochaetaceae?
What is special about the morphology of bacteria in the family Spirochaetaceae?
Long long helical rods
Where are bacteria in the family Spirochaetaceae commonly found?
= water, soil, vegetation
2. Commensals of many animals
What is important about the metabolism of bacteria in the family Spirochaetaceae?
What is the best diagnostic test for bacteria in the family Spirochaetaceae?
How are bacteria in the family Spirochaetaceae identified?
1. Number of turns
2. Overall length
3. Type of motility
What animals is infected with Brachyspira hyodysenteriae? What is the name of the disease?
Swine Dysentery "bloody scours"
What is the route of transmission of Brachyspira hyodysenteriae?
What tissue does Brachyspira hyodysenteriae colonize?
Why is Brachyspira hyodysenteriae infection so pathogenic?
Bacteria release endotoxin & hemolysin
What age is most affected by infection with Brachyspira hyodysenteriae?
Older weaned piglets
What is the best diagnostic test for Brachyspira hyodysenteriae infection?
What is unique about the pathogenesis of Brachyspira hyodysenteriae infection?
It requires other bacteria to cause disease!
(no disease in pigs sole infected with B hyodysenteriae)
What other animal may spread Brachyspira hyodysenteriae infection?
Birds may spread the disease between farms
What disease is caused by Brachyspira pilosicoli?
Porcine colonic spirochetosis
How severe is the disease in pigs caused by Brachyspira pilosicoli?
Only some diarrhea
What is unique about the culturing of genus Leptospira?
Requires B vitamins
What is special about the growth of Leptospira interrogans?
It has two phases
What are the two growth phases of Leptospira interrogans?
1. Leptospiremia (1 week)
2. Leptospuria (months)
Where is the primary site of replication for Leptospira interrogans?
Can infection with Leptospira interrogans affect pregnancy?
How does Leptospira interrogans enter the body?
Through cuts in the skin
What animals are affected by Leptospira interrogans infection?
All domestic species
How does Leptospira interrogans evade host immunity?
Hides in immune privileged sites
(kidneys, eye, brain)
Is there a vaccine for Leptospira interrogans?
(but short term protection)
Are humans at risk for Leptospira interrogans infection?
(but it is rare)
What is important about the Spirochaetaceae genus Borrelia?
What animals are infected by Borrelia anserina? What disease does it cause?
Chickens, turkeys, geese, etc
What is the most important clinical sign of Borrelia anserina infection?