The mysterious high-pitched sound associated with so-called "sound attacks" on nearly 40 US and Canadian diplomats living in Cuba may be caused by a neurotoxic agent used to kill mosquitoes, a new study commissioned by Canadians by government statements.
Strange incidents begin at the end of 2016, when US and Canadian Embassy officials seek medical attention for hearing loss and ringing, which is ultimately related to the strange noises or vibrations that initially prompted investigators to suspect that the diplomats are the victims of malicious sound attacks, even though Cuba flatly denied the accusation. Things got so bad that the US and Canada cut their staff at the embassy, referring to the medical mystery, now called "Havana Syndrome."
CANADIAN DIPLOMATES ESSENTIAL GOVERNMENT FOR "CONNECTING SERIOUSNESS" OF SECRET SECURITY IN CANADA
Canada's Global Issues Commissioned a Clinical Study to Get to the Bottom of a Curious Case
"The working hypothesis actually came into being only after we had most results," Alon Friedman, lead author of the study, told CBC News in Canada.
Friedman's research team examines 26 Canadians who include a control group who has never lived in Havana.
Doctors, scientists and researchers have thoroughly evaluated the symptoms of Canadians and performed numerous tests for blood and brain testing. They found different levels of brain damage in an area that causes symptoms reported by diplomats and is susceptible to neurotoxins. They found that a key enzyme that is required for the proper functioning of the brain of the nervous system called cholinesterase is blocked. They then noted that certain classes of pesticides act by inhibiting cholinesterase and that Cuba, like many other tropical islands, regularly sprays pesticides to kill disease-carrying insects.
STATE DEPARTMENT TWO CUBAN DIPLOMATS IN THE MIDDLE OF THE GENERAL ASSEMBLIES, JANUARY 07009  the spread of the Zika virus. "
Records from embassies show that offices, as well as inside and outside diplomatic residences, were sprayed 5 times more often than under normal circumstances. Toxicological reports of Canadian victims confirm the presence of pyrethroid and organophosphate, two agents commonly found in fumigation products.
"There are many specific types of toxins that affect these types of nervous system … and these are insecticides, pesticides and other organophosphates ̵
Researchers have also been able to find a link between test subjects most severely affected by symptoms and the number of fumigations that have taken place at their work and homes.
Friedman adds that it was not clear whether the wider Cuban population was affected by all fumigations and if not why. He said his team, along with Cuban scientists, will look into these topics in the future.
"We (will) continue our research in other ways to try to confirm which of the toxins is more toxic, at what levels – many things are not known yet," Friedman says.
In January, a pair of researchers at the University of California, Berkeley and the University of Lincoln in the United Kingdom blamed the piercing sounds of short-tailed crickets known as Anuroinictus cel. The York Times reported that the high noise was low others claim the diplomats' illnesses are due to wicked viruses. Some also believe that the previous trauma is the real culprit. as a placebo effect in reverse, "he told Vanity Fair." You can often feel better by taking a sugar pill. You can also feel bad if you think you are getting sick. "
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Cindy Kalkin, a psychiatrist and member of the Canadian research team, pushed back to the idea of mass hysteria
"I interviewed all but one or two of the (victims) and found no evidence of a psychiatric disorder," she told CBC News. "It's a very strong group, very enduring, and there is no evidence of mass hysteria. Part of the diagnosis of mass hysteria is that there are no other major medical causes that can be detected. And we (found) basic medical evidence. "