UPDATE 1-CDC says 14,000 people at risk of meningitis amid call for criminal probe

* CDC says 14,000 people at risk of infection

* Death toll rises to 14; total sickened jumps to 170

* Influential U.S. senator calls for federal probe

(Adds CDC reports of deaths, sickened, calls for aninvestigation)

NASHVILLE, Tennessee, Oct 11 (Reuters) - U.S. healthauthorities said on Thursday that more people than earlierthought received possibly tainted steroid injections and some14,000 patients could be at risk of contracting meningitis in anunprecedented outbreak of the disease.

The U.S. Centers for Disease Control said the number ofpeople at risk, which is 1,000 higher than earlier estimated,was revised after consulting with health authorities.

Fourteen patients have died from meningitis and 170 peoplehave been infected, the CDC said in its latest update onThursday. The number of infections ballooned by 33 sinceWednesday, CDC said.

Florida reported a second death from meningitis and Indianareported its first death from the outbreak. Meningitis caseshave been confirmed in 11 states.

(Additional reporting by David Morgan; Writing by James B.Kelleher and David Bailey; Editing By Greg McCune and VickiAllen)