I just searched under ringworm and found a bacterial infection that sounded like it could be both of your infections, especially the initial person. It is called cellulitis (not to be confused with 'cellulite'). There was information on it on the medline encyclopedia and I think it has to be treated with a specific antibiotic. Although it only produces large red patches with a tight skin, lymph glands can be infected and it can result in sepsis as well as a collapsed lung. Peripheral vascular problems are also indicated. I think the other private messages were incorrect, as I think this may be the thing, it can be caught through the feet if there are cracks in your feet. I think this may be a solution even though one can also have candida and or ringworm fungal infection. Hope this helps you both!!