[Lyme nephritis in humans: Physio-pathological bases and spectrum of kidney lesions].

Gueye S, et al. Nephrol Ther. 2019.


Known in less than half a century, borreliosis, or Lyme disease, is a zoonosis caused by the tick bite. It is the most common vector disease in Europe and the United States. Borrelia burgdorferi sensu lato, the bacterium in question, is fitted with a “cunning device” that allows it to trick the immune system and implant the infection chronically. It causes multi-system tissue damage mediated by the inflammatory response of the host.

Renal involvement is rarely reported and is better known in dogs as Lyme nephritis. The first case of kidney impairment in the human being was described in 1999, and since then eight other cases have been reported. The involvement is preferentially glomerular; the histological forms vary between immune complex nephropathy and podocytopathy. The pathophysiological mechanisms appear to be triple: immune complex deposits, podocytic hyper-expression of the B7-1 membrane protein, and renal infiltration of inflammatory cells. On the basis of the accumulated knowledge of the disease in just over 40 years, this review aims at establishing the physio-pathological hypotheses of renal involvement in order to better define the histological lesions.



Very thankful these French authors mention the important aspects of chronic infection and multi-system involvement. This type of honesty is rare in Lyme/MSIDS research. Also thankful they state that renal involvement is rarely reported and don’t make the mistake so many other researchers do by stating that the manifestation itself is rare, because again, nobody’s keeping score and just because it didn’t make it into the literature doesn’t mean it isn’t out here.  I’m also thankful they mention animal studies, because researchers typically ignore animal studies regarding Lyme/MSIDS.


  • Bb found in ALL targeted tissue samples
  • Molecular beacon shows round bodies & spirocheteal forms
  • Immunostating also shows Bb in different forms
  • standard treatment did not eliminate Bb
%d bloggers like this: