title: [Experimental model of Lyme disease in rats].
abstract: BACKGROUND
  An experimental model in rats can contribute to the understanding of the pathogenesis and improvement of treatment of Lyme borreliosis.
  
  
  OBJECTIVE
  To develop a Lyme arthritis experimental model in Sprague-Davies rats.
  
  
  METHODS
  An intraperitoneal inoculation of Borrelia burgdorferi in three groups of Sprague-Davies rats was made. The first group was inoculated with dead B. burgdorferi. The second group was inoculated with low virulence B-31 B. burgdorferi. The third group was inoculated with high virulence B-297 B. burgdorferi.
  
  
  RESULTS
  After six months of follow-up, none of the rats in the first two groups presented arthritis whereas in the third group 18 rats (72%) developed arthritis in one or more joints. Histologic showed synovial hypertrophy and inflammatory infiltration composed of polymorphonuclear leukocytes, plasma and mast cells in the infected joint. B. burgdorferi was isolated in the liver and spleen cultures taken 14 days after inoculation in 40% of the rats inoculated with B-297 strain.
  
  
  CONCLUSIONS
  An easy and inexpensive experimental model of Lyme arthritis in rats has been developed.
authors: Sección de Enfermedades Infecciosas, Hospital Ramón y Cajal, Universidad de Alcalá de Henares, INSALUD, Madrid.
authors: C
authors: C
authors: Valencia
authors: A
authors: A
authors: Serrano
authors: A
authors: A
authors: Guerrero
mesh_terms: D000818:Animals; D000831:Animals, Newborn; D001170:Arthritis, Infectious / Q000382:microbiology* / Q000473:pathology; D015748:Borrelia burgdorferi Group / Q000145:classification / Q000302:isolation & purification / Q000472:pathogenicity*; D007274:Injections, Intraperitoneal; D007668:Kidney / Q000382:microbiology; D008193:Lyme Disease / Q000382:microbiology / Q000473:pathology; D008954:Models, Biological; D051381:Rats; D013154:Spleen / Q000382:microbiology; D014774:Virulence
vernacular_title: Modelo experimental de la enfermedad de Lyme en ratas.