Not necessarily. There is no way I know of to determine the length of time one has been infected if one does not remember a bull's eye rash or other obvious/strong possibility point of exposure (i.e., known tick bite, etc.).
Bands of IgM and IgG are types of antibodies, they are not specific strains of bacteria. Many strains of Lyme may lead to the generation of the same bands of IgM and/or IgG antibodies. It is not known if Lyme can ever really fully be eliminated once the infection has been present more than a few months. Antibody tests are too inaccurate to use to determine when one is "cured" in the context of chronic Lyme infections. Symptoms are usually the best guide as to whether or not the Lyme is under control.
I hope this helps answer your questions...take care,
Chronic Lyme Disease, Chronic Bartonella (clinical dx only), Gluten & Sulfite Sensitivity, Many Food/Inhalant/Medication/Chemical Allergies & Intolerances, Asthma, Gut issues (dysmotility, non-specific inflammation), UCTD ("Secondary Lupus-Like Syndrome"), Osteoporosis, chronic Lymphopenia, etc.; G-Tube; Currently weaning off TPN.
Meds: Pulmicort, IV Doxycycline, Heparin (to flush PICC line), Claritin, Singulair, Domperidone, Colloidal Silver (topically & nasally), probiotics, Liver support herbs, Ailanthus, digestive enzymes, homeopathy.