102. Lamb dysentery and struck. Flashcards
1
Q
Lamb dysentery occurence?
A
Lamb dysentery
• Occurrence:
- worldwide,
- sporadic,
- frequency is increasing by the end of the lambing season
2
Q
Ethiology of Lamb dysentery?
A
Etiology:
- C. perfringens B
- Infection: feces, teats
- Toxin effect:
- beta,
- trypsin sensitive,
- necrosis,
- increases the permeability of blood vessels
3
Q
Clinical signs of Lamb dysentery?
A
• Clinical signs:
- 1-2 weeks old lambs,
- anorexia,
- abdominal pain,
- brownish,
- foamy,
- hemorrhagic diarrhea
4
Q
Pathology of Lamb dysentery?
A
Pathology:
- small intestine
- (hemorrhagic,
- necrotic enteritis,
- gas bubbles),
- hemorrhages,
- fluid in the pericardium
5
Q
Diagnosis of Lamb dysentery?
A
Diagnosis:
- epidemiology, clinical signs, pathology
- Bacteriology: microscopy, culture
- Toxin detection: epsilon
6
Q
Treatment and prevention of Lamb dysentery?
A
Treatment:
- treatment is generally not possible,
- hyperimmume serum
• Prevention:
- improving hygiene
- ewes
- penicillin
- vaccine
7
Q
Struck Occurence, ethiology and epidemiology?
A
Struck
- Occurrence: sporadic
- Etiology: C. perfringens C - toxins alpha, beta
- Epidemiology:
- predisposing factors like C. perfringens D
- (overeating, high protein and carbohydrate content,
- change of the diet),
- fast course,
- grower,
- adult sheep
8
Q
Pathogenesis, Clinical signs and pathology of Struck?
A
Pathogenesis:
- C. perfringens C colonize the mucosa (abomasum, small intestine),
- necrosis,
- toxemia
• Clinical signs:
- fast,
- anorexia,
- hunched back,
- grinding of the teeth,
- fast death
• Pathology:
- abdominal cavity (reddish fluid)
- small intestine
- (hemorrhagic enteritis,
- jejunal ulcer,
- fibrin,
- hematoma),
- hemorrhages,
- liver (necrosis - slower cases)
9
Q
Diagnosis, treatment and prevention of Struck?
A
Diagnosis:
- epidemiology, clinical signs, PM lesions
- Detection of toxin
- Isolation of the agent from organs
- Treatment: none
- Prevention: feed with high fiber content, vaccine
