"The cause of death in each case was identical," he said.
Now, investigating further, they found out which diseases are more likely to lead to death in each weight group.
Health officials in Minnesota and Idaho reported that one death in each state had been linked to the outbreak.
The cause of death in each case will be decided by a coroner, but relatives of two of them have indicated that they killed themselves.
Mr Latham said: "A positive cause of death in each case was impossible to establish because of the state of the bodies.
The immediate cause of death in each of the four men was infection, through what is known as the "foreign body" response.
The aim of the study is to investigate the burden of deprivation-associated excess of deaths by 10 leading causes of death in each gender and two age groups.
A small child named Kenny dies a different awful death in each episode of the animated show "South Park," but that mordancy is possible only because the show airs on Comedy Central.
Electronic's gently funky Getting Away With It purrs under a disco ball, while There Is a Light – perhaps the nation's favourite Smiths song – find performer and crowd loudly extolling the virtues of death in each other's company.
The document included questions on the handling and restraint methods (stunning, neck cutting/exsanguination/slaughter techniques and postcut handling performed under religious practices) and for pain and distress of the animal during the restraint, neck cutting and induction to death in each abattoir.
The House, which recessed last week, unable to finish its work on spending bills, now has 222 Republicans, 209 Democrats, one independent who votes with the Democrats, one independent who votes with the Republicans, and two vacancies, from a death in each party.
