running wild said...
Because of my kidneys, I have been very limited in what I can take. I’ve taken weaker drugs for Bartonella, such as Doxy, Amoxocillin and even gave Bicillin a try, but mixing antibiotics has been a problem because of kidneys.
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for what its worth RW - penicillin's like amoxillin and bicillin should in theory have activity against bartonella - indeed studies done in vitro in the lab often show that it is
the problem is that these drugs when used in animal or human trails rarely prove successful
this is a known issue with correlation between bartonella in vitro activity and real world en-vivo trials that applies to most antibiotics
most older papers seem to leave it there - without going further into why this is the case - the explanation seem to be linked to the findings by Zhang et all in the last few years that found radically different activity against growing phase bartonella cultures and "stationary phase" bartonella cultures - where stationary phase refers to the population of bacteria no longer growing exponentially - but maintaining constant numbers - and is associated in many species with biofilm and persister cell formation.
we now also know that Bartonella does indeed form biofilms - again raising the likelihood that it also forms persister cells.
this is significant as cell wall protein inhibiting drugs such as penicillins will only be active when the bacteria are trying to grow new cell walls - and since persister cells are not growing - cell wall drugs can have only limited effectiveness against them
this is not quite the same thing as saying that penicillin's are entirely ineffective against bart.
they still could be just enough to swing the battle in favour of the host immune system in some cases.
its more the case that, in real world infections, the organism has ways of evading their action such that they are not one of the recommended antibiotics for bart.
its actually quite a similar story for several of the common bart drugs - doxy, azithro, etc - and we know start to understand why persister drugs are so important in bartonella treatment