Salmonella enterica bacteria become more virulent and therefore better at causing disease in the micrograity environment of space.
Courtesy of CDC.
Salmonella enterica bacteria become more virulent and therefore better at causing disease in the micrograity environment of space.
Now playing
01:09
Salmonella 101: What you need to know
News 12 Long Island
Now playing
02:45
1 dead and 2 wounded in shooting at Long Island Stop & Shop
Now playing
00:00
WATCH LIVE: Jury has reached verdict in Derek Chauvin's trial, will be announced shortly
CNN
Now playing
01:33
Gupta on Covid-19: It doesn't seem to transmit well on surfaces
NBC/Today Show
Now playing
02:27
'To a certain extent, nativist': Bush criticizes current GOP
Scene video following a crash involving a Tesla Saturday night in Spring, TX
Scott Engle
Scene video following a crash involving a Tesla Saturday night in Spring, TX
Now playing
01:09
Fatal Tesla crash had no one in the driver's seat, police say
alexey navalny russia health vladimir putin Kiley pkg intl ldn vpx_00012003.png
alexey navalny russia health vladimir putin Kiley pkg intl ldn vpx_00012003.png
Now playing
03:06
Navalny ally warns he is in dire health. Here's how he got here
DOGE COIN
Getty Images
DOGE COIN
Now playing
03:24
Dogecoin's value has skyrocketed this year
Fox News/CNN
Now playing
04:07
Keilar rolls the tape on Trump's first in-person interview as former President
Reuters
Now playing
02:14
Military spokesman announces transitional president in Chad
WCCO
Now playing
01:27
Shots fired at Minnesota National Guard and police team
CNN
Now playing
02:10
Fauci: We'll get Johnson and Johnson vaccine back 'in some manner'
WTMJ
Now playing
01:45
3 killed in Kenosha, Wisconsin, tavern shooting
Indianapolis shooting victims family 04172021
CNN
Indianapolis shooting victims family 04172021
Now playing
03:22
'Completely devastating': Family of Indianapolis shooting victims speak out
WINDSOR, ENGLAND - APRIL 17: The Duke of Edinburgh's coffin, covered with His Royal Highness's Personal Standard is carried to the purpose built Land Rover during the funeral of Prince Philip, Duke of Edinburgh at Windsor Castle on April 17, 2021 in Windsor, England. Prince Philip of Greece and Denmark was born 10 June 1921, in Greece. He served in the British Royal Navy and fought in WWII. He married the then Princess Elizabeth on 20 November 1947 and was created Duke of Edinburgh, Earl of Merioneth, and Baron Greenwich by King VI. He served as Prince Consort to Queen Elizabeth II until his death on April 9 2021, months short of his 100th birthday. His funeral takes place today at Windsor Castle with only 30 guests invited due to Coronavirus pandemic restrictions. (Photo by Adrian Dennis/WPA Pool/Getty Images)
Adrian Dennis/WPA Pool/Getty Images
WINDSOR, ENGLAND - APRIL 17: The Duke of Edinburgh's coffin, covered with His Royal Highness's Personal Standard is carried to the purpose built Land Rover during the funeral of Prince Philip, Duke of Edinburgh at Windsor Castle on April 17, 2021 in Windsor, England. Prince Philip of Greece and Denmark was born 10 June 1921, in Greece. He served in the British Royal Navy and fought in WWII. He married the then Princess Elizabeth on 20 November 1947 and was created Duke of Edinburgh, Earl of Merioneth, and Baron Greenwich by King VI. He served as Prince Consort to Queen Elizabeth II until his death on April 9 2021, months short of his 100th birthday. His funeral takes place today at Windsor Castle with only 30 guests invited due to Coronavirus pandemic restrictions. (Photo by Adrian Dennis/WPA Pool/Getty Images)
Now playing
02:29
See memorable moments from Prince Philip's funeral
Russian opposition leader Alexei Navalny delivers a speech during a demonstration in Moscow on September 29, 2019. - Thousands gathered in Moscow for a demonstration demanding the release of the opposition protesters prosecuted in recent months. Police estimated a turnout of 20,000 people at the Sakharov Avenue in central Moscow about half an hour after the start of the protest, which was authorised. The demonstrators chanted "let them go" and brandished placards demanding a halt to "repressions" of opposition protesters. (Photo by Yuri KADOBNOV / AFP) (Photo by YURI KADOBNOV/AFP via Getty Images)
YURI KADOBNOV/AFP/Getty Images
Russian opposition leader Alexei Navalny delivers a speech during a demonstration in Moscow on September 29, 2019. - Thousands gathered in Moscow for a demonstration demanding the release of the opposition protesters prosecuted in recent months. Police estimated a turnout of 20,000 people at the Sakharov Avenue in central Moscow about half an hour after the start of the protest, which was authorised. The demonstrators chanted "let them go" and brandished placards demanding a halt to "repressions" of opposition protesters. (Photo by Yuri KADOBNOV / AFP) (Photo by YURI KADOBNOV/AFP via Getty Images)
Now playing
02:09
Alexey Navalny 'close to death,' press secretary says
Rep. Marjorie Taylor Greene (R-GA) speaks during a press conference outside the U.S. Capitol on February 5, 2021 in Washington, DC. The House voted 230 to 199 on Friday evening to remove Rep. Marjorie Taylor Greene (R-GA) from committee assignments over her remarks about QAnon and other conspiracy theories.
Drew Angerer/Getty Images
Rep. Marjorie Taylor Greene (R-GA) speaks during a press conference outside the U.S. Capitol on February 5, 2021 in Washington, DC. The House voted 230 to 199 on Friday evening to remove Rep. Marjorie Taylor Greene (R-GA) from committee assignments over her remarks about QAnon and other conspiracy theories.
Now playing
03:20
Marjorie Taylor Greene lashes out at media after backlash over controversial caucus
(CNN) —  

A deadly strain of salmonella that has sickened more than 250 people may not respond to the antibiotics commonly prescribed to treat the foodborne infection, according to the US Centers for Disease Control and Prevention.

In its Morbidity and Mortality Weekly Report published on Thursday, the CDC said that from June 2018 to March 2019, 255 people in 32 states were infected with the strain, with 60 being hospitalized and two dying from the infection.

“We are continuing to see cases occurring among patients,” Dr. Ian Plumb, an epidemiologist in the CDC’s Enteric Diseases Epidemiology Branch and the lead author of the report, said in an email to CNN.

“The antibiotic resistance pattern of this strain is alarming because the primary oral antibiotics used to treat patients with this type of Salmonella infection may not work,” he said.

The salmonella infections were linked to beef obtained in the United States and soft cheese obtained in Mexico, suggesting that this strain could be present in cattle in both countries, the CDC found. Eighty-nine of the people who contracted the infection had recently traveled to Mexico.

“To prevent infection, consumers should avoid eating soft cheese that could be made with unpasteurized milk, and when preparing beef they should use a thermometer to ensure appropriate cooking temperatures are reached: 145 degrees Fahrenheit (62.8 Celsius) for steaks and roasts followed by a 3-minute rest time, and 160 degrees Fahrenheit (71.1 Celsius) for ground beef or hamburgers,” according to the new CDC report.

CDC

The CDC called the strain “emerging” and said it hadn’t been detected before 2016. The strain didn’t respond to ciprofloxacin and had “decreased susceptibility” to azithromycin – two antibiotic drugs often prescribed to treat Salmonella infections.

Most patients with salmonella infections recover without antibiotics, but those with severe infections need antibiotics. Resistant infections can be harder to treat, and patients may be at increased risk for developing serious complications.

Get CNN Health's weekly newsletter

Sign up here to get The Results Are In with Dr. Sanjay Gupta every Tuesday from the CNN Health team.

An estimated 1.2 million cases of salmonella occur annually in the United States, with approximately 450 people dying each year because of the infection. People become infected by eating foods such as beef, poultry, milk or eggs, contaminated with animal feces.

Typical symptoms include diarrhea, abdominal pain, nausea, vomiting and fever. Most people experience symptoms within eight to 72 hours after contaminated food is ingested.

The CDC said that avoiding the unnecessary use of antibiotics in cattle, especially those that are important for the treatment of human infections, could help prevent the spread of this drug-resistant salmonella strain.