Write about the collection, methods of preservation and dispatch of samples from the carcass of suspected rabid dog for laboratory diagnosis.
For laboratory diagnosis of rabies in a suspected dog carcass, strict sample handling is vital. The brain is the preferred specimen. Ideally, the whole head is removed carefully by trained personnel, or key sections (cerebrum, cerebellum, brain stem/medulla) are collected with sterile tools. Freezing the carcass should be avoided as it damages tissue integrity. For preservation, the brain or head must be placed in a strong, leak-proof container filled with 50% glycerine in physiological saline, which prevents putrefaction and maintains viral antigenicity for several days. Refrigeration at 4°C is acceptable for short-term holding, but glycerine saline is preferred for transport. For dispatch, the primary container is sealed, labeled with animal details, date, and suspected disease, then placed inside a secondary leak-proof bag and packed in a sturdy outer box with cushioning and ice packs (not dry ice in contact). Samples must be rapidly sent to a certified diagnostic lab under biohazard regulations.
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