that he acquired in India. The infection was identified as a carbapenem-resistant Klebsiella pneumoniae strain bearing the novel gene blaNDM-1. The authors concluded that the new resistance mechanism "clearly arose in India, but there are few data arising from India to suggest how widespread it is". Its exact geographical origin, however, has not been conclusively verified. In March 2010, a study in a hospital in Mumbai found that most carbapenem-resistant bacteria isolated from patients carried the blaNDM-1 gene. Later, the journal editor apologized for allowing the name. NDM-1 β-lactamase was also found in an K. pneumoniae isolate from Croatia, and the patient arrived from Bosnia and Herzegovina. The second geographical origin is considered to be eastern Balkans. In May 2010, a case of infection with E. coli expressing NDM-1 was reported in Coventry in the United Kingdom. The patient was a man of Indian origin who had visited India 18 months previously, where he had undergone dialysis. In initial assays the bacterium was fully resistant to all antibiotics tested, while later tests found that it was susceptible to tigecycline and colistin. The authors warned that international travel and patients' use of multiple countries' healthcare systems could lead to the "rapid spread of NDM-1 with potentially serious consequences". , there were three reported cases of Enterobacteriaceae isolates bearing this newly described resistance mechanism in the US, the Centers for Disease Control and Prevention (CDC) stated that "All three U.S. isolates were from patients having received recent medical care in India." However, US experts stated that it is unclear as to whether this strain is any more dangerous than existing antibiotic-resistant bacteria such as methicillin-resistant Staphylococcus aureus, which are already common in the USA. In July 2010, a team in New Delhi reported a cluster of three cases of Acinetobacter baumannii bearing blaNDM-1 that were found in the intensive care unit of a hospital in Chennai, India, in April 2010. As previously, the bacteria were fully resistant to all the aminoglycoside, β-lactam, and quinolone antibiotics, but were susceptible to tigecycline and colistin. This particularly broad spectrum of antibiotic resistance was heightened by the strain's expressing several different resistance genes in addition to blaNDM-1. A study by a multi-national team was published in the August 2010 issue of the journal The Lancet Infectious Diseases. This examined the emergence and spread of bacteria carrying the blaNDM-1 gene. This reported on 37 cases in the