HT Clostridium Flashcards
1
Q
5 types of histotoxic clostridium
A
- C. Chauvoei
- C. Septicum
- C. Novyi
- C. Perfringens
- C. Dificile
2
Q
Disease assc. W/ C. chauvoei
A
Black leg
3
Q
Diseases assc w/ C. Septicum
A
Malignant edema
Braxy
4
Q
Diseases assc w/ C. Novyi
A
Black disease
Myonecrosis
5
Q
Diseases assc w/ C. Prefringens
A
- gas gangrene
- mastitis
6
Q
Diseases assc w/ C. Dificile
A
- clostridial diarrhea (esp. in newborn foals & pigs)
7
Q
General features of Histotoxic clostridia (4 total)
A
- from soil
- enters via trauma
- multiply locally, prod. Toxins, causes extensive tissue damage, rapid death
- hemolysis may happen after hemolyticum and prefringens infections
8
Q
Characteristics of C. Septicum
A
- obligate, short rod/fil anaerobe, gram +ve, motile
- LEADING CAUSE OF WOUND INFECTIONS IN FARM ANIMALS
9
Q
Diseases assc w/ C. Septicum
A
- malignant edema: myonecrosis; direct wound contanmination
- malignant edema/gas gangrene: starts painful, lesions pit on pressure, becomes creptiant and cold
- Braxy/bradsot: a necrotic abomasitis caused by consuming cold feed; die in 36 hrs; in sheep/calves
10
Q
Characteristics of C. Chauvoei
A
Obligate, rod, gram +ve, motile, subterminal, central sp
11
Q
Natural habitat of C. Chauvoei
A
- intestines of cattle, sheep, goats
- in soil
12
Q
C. Chauvoei is the causative agent of
A
Blackleg; emphysematous necrotizing myositis
( in young, well-fed cattle)
13
Q
Diseases assc w/ C. Chauvoei
A
- muscle-residing spores activated by: local anoxia
- toxin prod. Causes: lesions & signs such as sudden death and lameness
- wound infections resemble gas gangrene or malignant edema
