Researchers Probe Mystery of Illnesses in U.S. Cuba Embassy Personnel

From Drugs.com - February 15, 2018

Researchers Probe Mystery of Illnesses in U.S. Cuba Embassy Personnel

THURSDAY, Feb. 15, 2018 -- They described hearing loud, unusual noises in either their homes or hotel rooms. Afterwards, they experienced concussion-like symptoms such as memory and thinking problems, headaches, dizziness and balance issues.

But the exact nature of what harmed more than 20 U.S. government personnel stationed in Havana, Cuba, last year remains mysterious, reports a team led by Dr. Douglas Smith of the University of Pennsylvania.

All that can be said for sure is that "we have identified a new syndrome that may have important public health implications," Smith said.

"None of these patients have suffered any type of blunt head trauma, yet the symptoms they describe and evaluations demonstrate are remarkably similar to those found in persistent concussion syndrome," noted Smith, who directs UPenn's Center for Brain Injury and Repair in Philadelphia.

Reports of the strange illnesses among U.S. diplomats stationed in Havana began to surface in late 2016 and continued through August of 2017, Smith's team reports in the Feb. 15 issue of the Journal of the American Medical Association.

Of the 80 embassy staff evaluated in the spring of 2017, "16 individuals were identified with similar exposure history and a constellation of neurological signs and symptoms" most often tied to concussion -- though none had suffered head injury, the researchers noted. Another eight cases developed over time.

The U.S. government convened an expert panel to look into the issue and that panel "came to consensus that the triage findings were most likely related to neurotrauma from a non-natural source," and requested further investigation, led by the UPenn team.

Initial testing done at the University of Miami also showed that the symptoms resembled those of concussion. Patients were then tested in a more detailed manner at UPenn facilities, beginning in the summer of 2017.

"In the new study, the Penn research team reports that patients experienced a wide variety of neurocognitive symptoms, including memory problems, trouble concentrating and processing information, and word-finding difficulties," a UPenn news release noted. "Visual focusing, dizziness and balance problems were also commonly reported during and after the sound incidents, and many patients subsequently suffered from headaches and sleep problems."

Overall, more than 20 people from the U.S. diplomatic staff in Havana have displayed such symptoms, Smith's group concluded.


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