Sudden death in cattle Flashcards
Signs of death due to anthrax
Reduced rigor mortis, blood is black and doesn’t clot, haemorrhages throughuot, enlarged spleen, enteritis
How do we diagnose anthrax
Methylene blue stained blood smear; from ear prick
What causes black disease
C novyi type B
= infectious necrotic hepatitis
What clostridia causes necrotic enteritis
C perfringens type C
What clostridia causes bacillary haemoglobinuria
C novyi type D
PM signs of bacillary haemoglobulinuria
rapid rigor mortis, subserosal haemorrhage, jaundice, anaemic infarctions in liver, red urine in bladder
What. clostridia species causes blackleg and what type of disease is it
C chauvoei
= gangrenous myositis
What type of disease is malignant oedema/gas gangrene
Clostridial myositis
Which types of C botulinum cause botulism
B, C, D
- via ingestion of pre-formed toxins
What are the PM findings in black disease
Dark brown areas of liver necrosis, dark fluid within cavities, inside of skin is black
What two things predipose to black disease
Liver fluke
Heavy grain feeding
What clostridia causes jejunal haemorrhagic syndrome
C perfringens type A
What clostridium causes necrotic enteritis and who do we see it in
C perfringens type C
Rare; seen in beef calves at pasture
Which fluids are good to look in post mortem for metabolite levels
Ocular fluid
- Vitreous is better than aqueous
PM signs with death from bloat
Lungs compressed, rumen distended with hyperaemic mucosa, bloat line of oesophagus (congested cranially and pallor caudally)
