Yes, it can be purely from these infections - they don't leave anything 'untouched' for some of us. I've had blood sugar issues, was only one point away from having to start medications due to my A1c being too high - but I refused. I knew that it was these infections, and I wasn't "quite" to the point where I needed to be concerned about
damage from my blood sugar remaining too high.
Usually it's only insulin resistance that we deal with, but diabetes is a possibility as well. There is evidence that infections that cause wide spread inflammation can lead to insulin resistance:
In this instance, Staph bacteria was used:
"Schlievert and his colleagues recently wanted to learn more about
what happens when staph bacteria colonies grow to extraordinary numbers. Prior studies had shown a “superantigen” effect. When the bacteria reach a certain threshold, they initiate a defense mechanism against the body’s immune system, targeting key cells involved with immune-related functions, called T-cells.
In their latest study, the investigators exposed a group of rabbits to the staph superantigen. Once in the body, the bacteria created a domino effect of physiologic responses — first targeting fat cells and the immune system, which then triggered an inflammation response and, finally, insulin resistance. When the team took swab samples from four diabetes patients, they found superantigen levels were proportional to those causing diabetes-like symptoms in the rabbits."
www.medicaldaily.com/type-2-diabetes-begins-bacterial-infection-suggesting-room-vaccine-336402