D.C. Mun. Regs. tit. 22, r. 22-B203
A veterinarian or other person who has reason to suspect any of the following shall report that fact immediately by telephone to the Director, and shall immediately follow the telephone report with a written report to the Director:
A report of an event described in § 203.1 made to a member of the Metropolitan Police Department, the D.C. Department of Health Animal Services Animal Care and Control Field Services Division, or a privately owned veterinary hospital or clinic, shall be communicated immediately by telephone to the Director and shall immediately be followed with a written report to the Director.
The report required by § 203.1 shall contain the following information in addition to any information required by § 202.9:
When the Director has reason to believe that a dog or other animal is rabid, or has been bitten by a suspected rabid animal, or has bitten a person or exposed a person to rabies, the Director shall notify the owner or possessor of the exposed dog or other animal.
After receiving notification from the Director as required by § 203.4, the owner or possessor of the animal that was bitten by another animal shall quarantine it on his or her premises, or, if the Director deems necessary, at a place the Director designates at the expense of the owner or possessor. The length of quarantine for the animal that was bitten ("bitten animal") shall be determined based on information available about the animal that initiated the bite ("biting animal") , according to the following criteria:
A person who has been bitten by a dog or other domestic animal shall initiate rabies post-exposure prophylaxis based on the vaccination history and disease state of the biting animal and the recommendation of the Director. After receiving notification from the Director under § 203.4, the owner or possessor of the biting animal shall quarantine the animal for ten (10) days, regardless of the rabies vaccination status, on his or her premises, or, if the Director deems necessary, at a place the Director designates at the owner or possessor's expense. During this period, the biting animal shall not be vaccinated for rabies.
A health care provider with a patient who presents for a bite or exposure to a potentially rabid animal shall immediately initiate rabies post-exposure prophylaxis. The provider may discontinue treatment only when a rabies test on the biting animal is negative, or the animal is proven adequately vaccinated.
A person who captures wildlife that has bitten a person or animal, or caused a potential rabies exposure to a person or animal, shall bring the captured animal to the Animal Care and Control Agency for immediate euthanasia. The Animal Care and Control Agency shall submit tissue samples of the animal to the Department of Forensic Sciences for rabies testing.
A person holding an animal for quarantine under this section shall make the animal available for observation and examination by a licensed veterinarian or an official appointed by the Director, to determine the presence of symptoms of rabies on the first and last days of a quarantine period, at the person's expense. An animal under quarantine that exhibits clinical signs of rabies during the quarantine period shall be transported to the Animal Care and Control Agency for humane euthanasia. The Animal Care and Control Agency shall submit tissue samples of the animal to the Department of Forensic Sciences for rabies testing.
A person holding a quarantined animal shall not release, remove from the District, or otherwise dispose of the animal during the quarantine period. If the animal dies during the quarantine period, the person holding the animal shall notify and make the entire animal available to the Animal Care and Control Agency for examination, testing, and ultimate disposal.
D.C. Mun. Regs. tit. 22, r. 22-B203