hello and welcome
sorry to hear you have been suffering with this very challenging illness
but you are in good company here as there are many fellow sufferers and lots of helpful and knowledgeable people
ref testing - it looks like you had the following 5 tests done
and the the results acc to the website published criteria are as follows ( in brackets)
1,Lyme western blot IgM ( negative - although not far from the positive criteria)
2,Lyme Western Blot IgG (positive)
3, LymeScreen IgM ( positive)
4, LymeScreen IgG (negative)
5, Bartonella IgG multispecies immunoblot ( positive)
testing for lyme disease and co-infections is difficult - as test are less than perfect and there are many grey areas
that said - it was a good move to get tested for lyme via different test methods - as this is able to give you a better more rounded view compared to a single test ( a good strategy when testing is less than perfect)
so even though you did not test positive on every test for Lyme, unfortunately testing is often grey like this in Lyme disease, and this is pretty common in people who have been ill for over 6 months
since either IgM or IgG antibodies for Lyme were present on each test type - overall it seems very likely that lyme disease is indeed present.
the bartonella test was also positive for IgG antibodies - demonstrating past exposure for bartonella.
if you have symptoms corresponding to bartonella - then its likely that this is still present also
and in fact when lyme is in the picture its much more likely bartonella is active and causing problems as lyme weakens the immune system and allows other infections to be active.
they were able to detect the species in this case - B. Elizabethae is a species associated with rodents and to some extent also cats and dogs ( which may get it from teh rodents and pass it on to their human owners - through bites, scratches or flea bites)
some info on that species here
paper said...
B. elizabethae has been reported to cause human illness, and strains of this bacterium have been isolated from small mammals in Asia (48). It was originally isolated by Daly et al. (18) from a patient with endocarditis, and human serologic evidence of B. elizabethae infection has been reported in Thailand (49). Clinical characteristics may include headache, lethargy, muscle pain, conjunctival suffusion, and anemia. Almost 70% of patients with evidence of B. elizabethae infection also recorded exposure to rats, while the rest had cat exposure
source:
https://journals.asm.org/doi/full/10.1128/cmr.00013-17