An outbreak of drug-resistant salmonella across the US in 2018-19 may have been caused by a 41% spike in the use of antibiotics in cows the previous year . Before the outbreak, azithromycin-resistance in this germ was exceedingly rare. The strain, which affected two people and killed two , was found by CDC ( CDC ) to be resistant to numerous antibiotics, including azithromycin, which is often prescribed to treat the infection. But a 23 2018-19 CDC report noted that the disease, which was traced back to US beef and Mexican cheese, followed an increased use of macrolide antibiotics, which include azithromycin, by cattle farmers in August 2019 .
An outbreak of drug-resistant salmonella across the US in 2018-19 may have been caused by a 41% spike in the use of antibiotics in cows the previous year . The strain, which affected two people and killed two , was found by CDC ( CDC ) to be resistant to numerous antibiotics, including azithromycin, which is often prescribed to treat the infection. But a 23 2018-19 CDC report noted that the disease, which was traced back to US beef and Mexican cheese, followed an increased use of macrolide antibiotics, which include azithromycin, by cattle farmers in August 2019 .