The full report is still pending but here is what we know now. The researchers infected 1,300 soldiers, prostitutes, prisoners and mental patients with syphilis, gonorrhea or chancroid. Only 700 of those infected received some sort of treatment and 83 people died.
One particularly egregious example involved seven women with epilepsy who were housed at the Home for the Insane. They were infected with syphilis into the spinal column as a way to cure epilepsy (?). All of the women got bacterial meningitis, likely from non-sterile injections.
Another female patient with syphilis was infected with gonorrhea in her eyes and elsewhere so researchers could see the impact of additional infections. She died 6 months later.
Needless to say, none of this "research" produced any valuable information. The main researcher, Dr. John Cutler also let experiments in Terre Haute, Indiana in which prison inmates were infected with gonorrhea. The inmates were volunteers, although one has to question how much "freedom" an inmate would have had in 1943 to refuse. The Guatemalan participants gave no informed consent. Dr. Cutler was also involved in the Tuskegee, Alabama research where hundreds of black American men were deliberately left untreated for syphilis. The experiment lasted a shocking 40 years, until 1972.
There is no doubt that these experiments are a crime against humanity. Even though it seems like it was a long time ago and nothing like that could ever happen again, we must recognize that we face ethical issues in medicine all the time. If we don't learn from the past, we are doomed to repeat it. (Consider the genocide that is occurring right now in Darfur and the blind eye the world is turning toward it)
As shocking as these reports are, Dr. John Cutler was described as a research pioneer in his obituary when he died in 2003. He rose to great prominence and accolades, despite behavior that should have led to jail time. Check it out here.