The United States government reported the presence of NDM-1 in three people last year. All had been to India earlier for medical treatment.

Experts say people with the NDM-1 form of bacteria in their body can remain healthy. The danger is created if you get bacteria that cause disease. The gene can produce the disease bacteria and make enzymes to fight even the most powerful antibiotics. Antibiotics are the main treatment for bacterial infections.

Officials in India say its water supply is safe. Vishwa Mohan Katoch is the Director General of Health Services. He says the bacteria do not usually cause a problem.

However, officials in New Delhi are investigating. Timothy Walsh says he offered his team to help in the investigation, but Indian officials rejected the invitation. He worries about the science of the study.

TIMOTHY WALSH: “My fear is that this investigation that they are going to undertake will almost certainly not employ the right methods and the study designed will be quite poor and therefore I’m not convinced that the outcome will be scientifically credible.”

Professor Walsh also says its time for the international community to force countries to follow World Health Organization guidelines for antibiotic use.

And that’s the VOA Special English Health Report written by Caty Weaver and Vidushi Sinha. For more news about health, and to download our reports, go to voaspecialenglish.com. You can also follow us on Facebook, Twitter, and YouTube and VOA Learning English. I’m Steve Ember.