(AP) — Chances are you’ve heard of mapping genes to diagnose rare diseases, predict your risk of cancer and tell your ancestry.

But to uncover food poisonings?

The Centers for Disease Control and Prevention is beginning a program to outsmart food outbreaks by routinely decoding the bugs’ DNA.

First up is listeria, bacteria especially dangerous to pregnant women.

Federal and state officials are sequencing the genomes of all the listeria infections diagnosed in the U.S. this year, along with samples found in tainted foods or factories.

It’s the first time the technology has been used for routine disease surveillance — looking for people with matching strains who may have gotten sick from the same source.

CDC Director Dr. Tom Frieden calls it a new, more precise way to find and fight infections.

(AP) — Investigators say they may never determine what caused Spc. Ivan (ee-VAHN’) Lopez to go on a deadly shooting rampage at Fort Hood, despite evidence that suggests an argument ignited the incident.

That rampage left three other soldiers dead and 16 wounded before the gunman took his own life.

Chris Grey, a spokesman for the Army’s Criminal Investigation Command based in Quantico, Va., said the military has not established a “concrete motive” for Spc. Ivan (ee-VAHN’) Lopez’s rampage.

And because Lopez is dead, Grey says it may never know.

Lt. Gen. Mark Milley, Fort Hood’s commander, said an “escalating argument” precipitated the assault, even though investigators believe Lopez made no effort to target specific soldiers.

(AP) — State officials fighting well-publicized battles against heroin and prescription drugs are revolting against a powerful new painkiller that some fear could make the battle even harder.

On Thursday, Vermont Gov. Peter Shumlin announced an emergency order that would make it harder for physicians to prescribe a new class of drugs that includes Zohydro.

Last week, Massachusetts Gov. Deval Patrick banned Zohydro, the first time the state has ever banned a drug.

Late last year, 28 attorneys general urged the Food and Drug Administration to revoke the drug’s approval or require the manufacturer to reformulate the drug to make it more difficult to abuse.

San Diego-based Zogenix, which makes Zohydro, says its drug no more potent than other hydrocodone medications and is taking steps to ensure doctors and patients understand its risks.

(AP) — A 10-year-old girl who died of brain cancer is leaving a legacy for other sick children in a new law signed by President Barack Obama.

Obama on Thursday signed the bipartisan Gabriella Miller Kids First Research Act. It directs $126 million in federal money to be spent over the next decade to research pediatric cancer and other childhood disorders. Her parents and brother watched Obama sign the bill.

Gabriella pushed Congress to pass the law in an emotional video posted to YouTube before she died last October. The Leesburg, Va., girl told political leaders: “Stop talking and start doing.”

The legislation calls for eliminating taxpayer funding for political conventions and redirecting it to pediatric research at the National Institutes of Health.

Congress must fund the research in future spending bills.

(AP) — The Army’s top civilian official says the soldier accused in the Fort Hood shooting this week was deployed for the final months of the Iraq war but did not see combat.

Three people died and 16 were wounded before the shooter committed suicide.

Army Secretary John McHugh testified Thursday that the soldier appeared to have no connections to extremist groups.

The soldier is identified by others as Ivan Lopez. He enlisted in the Army in June 2008 as an infantryman and later switched his specialty to truck driver, the job he had in Iraq.

McHugh says the soldier was examined by a psychiatrist last month and was found to show no violent or suicidal tendencies. He says the soldier had been prescribed Ambien to deal with a sleeping problem.

(AP) — A Cincinnati man has pleaded guilty in the accidental shooting death of his 11-year-old daughter and has been sentenced to six years in prison.

Prosecutors say 34-year-old Deandre Kelley was drunk on Jan. 12 when he fought with his longtime girlfriend and fired two gunshots into the air. One bullet hit their daughter Shanti Lanza, who had been hiding in an upstairs bedroom.

Kelley pleaded guilty to one count of reckless homicide in an emotional hearing Wednesday in Hamilton County court. In exchange, prosecutors dropped charges of involuntary manslaughter and endangering children, and a weapons count.

Kelley’s attorney, Hugh McCloskey Jr., says that after talking the case over with the judge, his client realized that a six-year sentence was the best deal he was going to get.

(AP) — Nationwide marijuana legalization seems inevitable to three-fourths of Americans, whether they support it or not.

That’s according to a new poll out Wednesday by the Pew Research Center on the nation’s shifting attitudes about drug policy.

The survey also suggested that the public supports a national move away from mandatory sentences for non-violent drug offenders by a nearly 2-1 margin.

The Pew poll showed growing public acceptance of pot use. Just 15 percent said they would be bothered if people in their neighborhood used marijuana in their own homes, though 63 percent said they would be bothered by use in public.

The telephone survey of 1,821 adults was conducted Feb. 14-23. The survey had a margin of error of plus or minus 2.6 percentage points.

(AP) — Police say razor blades were found duct-taped to playground equipment at a park outside Philadelphia.

Police in the Delaware County town of Brookhaven say the blades affixed to equipment in Eaton Park could have injured children playing in the area.

They said other parks in the town had been checked and were clear, but they will be checked by both patrol and plainclothes officers on every shift.

On their Facebook page, police asked parents to check equipment before letting children play, and said older, unescorted children should be warned as well.

Police credited maintenance personnel for discovering the vandalism. No injuries were reported.

A week ago, authorities in western Illinois found a dozen razor blades glued to playground equipment in a city park in East Moline.

(AP) — General Motors is recalling 1.5 million vehicles in the U.S. because the electronic power-steering assist can suddenly stop working.

Included in the recall are the Chevrolet Malibu, Malibu Maxx, Chevrolet HHR, Saturn Aura, Saturn Ion and Pontiac G6. Model years vary, but all of the vehicles are from the 2010 model year or earlier.

The new recall brings to 6.3 million the number of vehicles GM has recalled since February. The initial recall — now at 2.6 million small cars for an ignition switch defect — prompted the automaker to name a new safety chief and speed up pending recalls.

The company expects recall-related costs to total $750 million in the first quarter.

In the latest recall, dealers will replace the power steering motor and other parts for free.

(AP) — New research is boosting hopes that weight-loss surgery can put some patients’ diabetes into remission for years and perhaps in some cases, for good.

Longer follow-up from a major study shows that stomach-reducing operations are better than medications for treating “diabesity,” the deadly duo of obesity and Type 2 diabetes. Millions of Americans have this and can’t make enough insulin or use what they do make to process food.

After three years, blood-sugar levels were normal in 38 percent and 25 percent of two groups given surgery, but in only 5 percent of those treated with medications.

Doctors won’t call it a cure because they can’t guarantee diabetes will never return, but they hope for long-term remission.

The study was discussed Monday at a cardiology conference in Washington.