By Bill Redlin
The first two cases of swine flu resistant to Tamiflu are being reported by health officials in Maryland.
Johns Hopkins Hospital in Baltimore says the two patients were treated there and have been discharged.
The hospital says the federal Centers for Disease Control and Prevention, as well as health officials in Maryland confirmed the patients had a drug-resistant form of the virus.
Last month, health officials in North Carolina announced that four patients at one hospital had tested positive for Tamiflu-resistant swine flu. That is the biggest cluster that has been seen in the U.S.
Tamiflu is one of two common swine flu treatments and health officials have been on the watch for signs of resistance to the drugs. More than fifty resistant cases have been reported since April. Twenty-one of those were in the United States.