What are the prevention and treatment methods for Clostridium perfringens diarrhea in rabbits?
The disease is an acute intestinal infectious disease of rabbits caused by Clostridium perfringens type A, characterized by severe diarrhea, foul-smelling excreta and rapid death.
Etiology
The pathogen is Clostridium perfringens type A.
Epidemiology
Except for suckling young rabbits, domestic rabbits of different ages, breeds and sexes are all susceptible to this pathogen. The incidence is highest in young rabbits aged 1 month to 3 months. Infection occurs mainly through the digestive tract or damaged mucosa. Predisposing factors include improper feeding and management, shortage of green feed, low crude fiber content, feeding high-protein feed or long-distance transport, sudden climate changes, etc. The disease can occur throughout the year, and is more common in winter and spring.
Clinical symptoms
The incubation period is 2 days to 3 days, and can be as long as 10 days. The clinical feature is acute diarrhea, with watery diarrhea before death. Before the watery diarrhea appears, there are no obvious changes in spirit and appetite; after the watery diarrhea appears, the rabbit becomes depressed and stops eating. The feces are watery, with a special foul odor, contaminating the buttocks and hind legs.
Pathological changes
The carcass does not show obvious emaciation. The stomach is filled with chyme, the mucosa at the fundus of the stomach has sloughed off, and there are ulcers of varying sizes. The small intestine is filled with gas, and the intestinal wall becomes thin and transparent. The cecum and colon are filled with gas and dark green thin contents, and a putrid smell can be detected; the liver becomes brittle in texture, and the spleen is dark brown.
Diagnosis
A preliminary diagnosis can be made based on clinical symptoms and pathological changes, and confirmation requires further laboratory diagnosis.
Laboratory diagnosis
Pathogen examination: smear microscopy (take jejunal contents for smear examination to check the bacterial bodies), isolation and culture (anaerobic meat liver broth and small sheep blood agar plates), toxin isolation and identification (animal tests and neutralization tests using standard Clostridium perfringens typing sera).
Serological examination: agglutination test, neutralization test and SPA-enzyme-linked immunosorbent assay.
Differential diagnosis
This disease should be differentiated from coccidiosis, rabbit pasteurellosis and salmonellosis.
Prevention and treatment
Strengthen feeding and management, reduce the feeding of concentrated feed, and increase crude fiber. In areas where the disease commonly occurs, vaccines should be used for prevention.