Some Allen County officials say the plan would save taxpayer money and reduce the likelihood of inmates ending up back in jail after release.
The public showed overwhelming support for the syringe exchange proposal at a public meeting, prompting the commissioners to take an unplanned vote.
Ft. Wayne's mayor was proposing an annexation plan, but schools and government offices argued the cost of the mayor's plan would have been crippling.
Allen County is the only other county in the state that has a permanent mental-health court.
State health officials are warning of a potentially-fatal virus contracted by an Allen County resident.
Experts say four cases of Creutzfeldt-Jakob Disease, a fatal neurological disorder, in the same area is most likely the result of coincidence.