U.S. health officials say the death toll in a rare fungal meningitis outbreak across several states has risen to seven as the outbreak has spread to more than 60 people.

In updated figures posted to its website Saturday, the Centers for Disease Control and Prevention says the outbreak has is now in nine states. The latest cases have been confirmed in Minnesota and Ohio. And, the number deaths has gone up from five to seven.

Health officials have been busy identifying the medical clinics across the country that received steroid shots for back pain now linked to the illnesses.

Authorities took the step to help identify everyone who may have gotten sick — or may still get sick — in the outbreak.

The Minneapolis-St. Paul area Medical Advanced Pain Specialists (MAPS) pain clinics and the Minnesota Surgery Center used a steroid linked to a fungal meningitis outbreak. (Jim Mone/Associated Press)

"All patients who may have received these medications need to be tracked down immediately," said Dr. Benjamin Park of the Centers for Disease Control and Prevention.

"It is possible that if patients with infection are identified soon and put on appropriate antifungal therapy, lives may be saved," he said in a statement.

The CDC said the number of cases of the rare fungal meningitis reached 64 cases as of Saturday afternoon. According to the CDC's website, the number of infections and deaths according to state is as follows:

• Florida: 4 cases
• Indiana: 5 cases
• Maryland: 3 cases, including 1 death
• Michigan: 8 cases, including 2 deaths
• Minnesota: 1 case
• North Carolina: 2 cases
• Ohio: 1 case
• Tennessee: 29 cases, including 3 deaths
• Virginia: 11 cases, including 1 death

Investigators have focused on a steroid medication made by a specialty pharmacy in Massachusetts. All the outbreak patients had gotten shots of the steroid for back pain, a common treatment, and inspectors found at least one sealed vial contaminated with fungus.

On Friday, officials said they have found fungal infections in nine sick patients. They weren't able to identify what types of fungus in every one of those patients, but did distinguish at least two types — Aspergillus and Exserohilum.

The first known case in the meningitis outbreak was diagnosed about two weeks ago in Tennessee, and the steroid was recalled last week by the pharmacy, New England Compounding Center in Framingham, Mass.

Steriod used in 75 facilities in 23 states

About 17,700 single-dose vials of the steroid were covered in the recall. On Friday, the government released the names of about 75 facilities in 23 states that got recalled doses between July and September.

It's not clear how many were sent to clinics, how many were used, or even whether everyone who got one will get sick. Once infected, it can take as long as a month for symptoms to appear.

At the prompting of government officials, clinics are notifying all the patients who got shots from the recalled lots.

"There's a massive effort to contact all the patients," said Marsha Thiel, the chief executive officer of MAPS, a company that owns surgery center clinics in Minnesota.

She added, "If there's any question at all, they're being directed to go to their physician."

As a precaution, the Food and Drug Administration urged doctors not to use any of the company's products, and released a list Friday that included other steroids, anesthetics and a blood pressure medicine. The company, which is now closed, said in a statement Thursday that despite the FDA warning, "there is no indication of any potential issues with other products."

The steroid is known as preservative-free methylprednisolone acetate, which the compounding pharmacy creates by combining a powder with a liquid.

There are FDA-approved versions of the drug, sold by the brand name Depo-Medrol, in good supply. So patients who need the medicine should not encounter a shortage, the FDA said Friday.

Most of the anxiety now involves patients who got steroid shots for back pain and are worried about becoming seriously ill.

"Our phone is ringing off the hook this morning. Patients are calling. Of course, they're concerned," said Paulette Fry, practice manager at Wellspring Pain Solutions in Columbus, Ind., about 40 miles south of Indianapolis. She said the clinic was sending out letters to about 300 patients who received spinal injections with the drug.

Meningitis is an inflammation of the lining of the brain and spinal cord. Symptoms include severe headache, nausea, dizziness and fever.

Fungal meningitis is not contagious like the more common forms. The types of fungus linked to the outbreak are all around, but very rarely causes illness. Fungal meningitis is treated with high-dose antifungal medications, usually given intravenously in a hospital.