Background: While Koch's postulates have been fulfilled for Lyme disease; causing transient fever, anorexia and arthritis in young dogs; treatment of sero-positive dogs, especially asymptomatic animals, remains a topic of debate. To complicate this matter the currently recommended antibiotic treatments of Lyme Disease in dogs caused by Borrelia burgdorferi require daily oral administrations for 31 days or longer, which makes non-compliance a concern. Additionally, there is no approved veterinary antimicrobial for the treatment of Lyme Disease in dogs in the USA and few recommended treatments have been robustly tested. In vitro testing of cefovecin, a novel extended-spectrum cephalosporin, demonstrated inhibition of spirochete growth. A small pilot study in dogs indicated that two cefovecin injections two weeks apart would be as efficacious against B. burgdorferi sensu stricto as the recommended treatments using doxycycline or amoxicillin daily for 31 days. This hypothesis was tested in 17-18 week old Beagle dogs, experimentally infected with B. burgdorferi sensu stricto, using wild caught ticks, 75 days prior to antimicrobial administration.
Results: Clinical observations for lameness were performed daily but were inconclusive as this characteristic sign of Lyme Disease rarely develops in the standard laboratory models of experimentally induced infection. However, each antibiotic tested was efficacious against B. burgdorferi as measured by a rapid elimination of spirochetes from the skin and reduced levels of circulating antibodies to B. burgdorferi. In addition, significantly less cefovecin treated animals had Lyme Disease associated histopathological changes compared to untreated dogs.
Conclusions: Convenia was efficacious against B. burgdorferi sensu stricto infection in dogs as determined by serological testing, PCR and histopathology results. Convenia provides an additional and effective treatment option for Lyme Disease in dogs.
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http://dx.doi.org/10.1186/s12917-015-0475-9 | DOI Listing |
BMJ Case Rep
January 2025
Orthopedic Surgery, Mayo Clinic Health System in Eau Claire, Eau Claire, Wisconsin, USA
Periprosthetic joint infection (PJI) is a devastating complication of total joint surgery. Surgical management of PJI has increased surgical risks and is costly to the healthcare system. This case study presents a unique clinical scenario involving a patient who was diagnosed with Lyme PJI at the total knee arthroplasty site after undergoing surgical management.
View Article and Find Full Text PDFInt J Med Microbiol
January 2025
Global Vaccines, and Anti-infectives Medical Affairs, Pfizer Inc., 1 Portland Street, Cambridge, MA 02139, USA. Electronic address:
Introduction: Lyme borreliosis (LB), an infection caused by Borrelia burgdorferi sensu lato (Bbsl), is the most common tick-borne disease in Europe. To further characterize the LB burden in the Czech Republic, we conducted a seroprevalence study and estimated the incidence of symptomatic Bbsl infections.
Methods: Anti-Bbsl IgM and IgG antibodies were detected in sera collected from the adult population in 2011 -2012 by enzyme-linked immunosorbent assay and immunoblot tests at the National Reference Laboratory.
J Infect Dis
January 2025
Section of Infectious Diseases, Department of Internal Medicine, School of Medicine, Yale University, New Haven, CT 06510, USA.
Lyme disease, caused by Borrelia burgdorferi, is transmitted to humans by Ixodes ticks. CCL17 is a potent chemokine that plays important roles in diverse illnesses, including autoimmune and infectious diseases. CCL17 knockout (KO) mice, infected with B.
View Article and Find Full Text PDFPLoS Pathog
January 2025
Microbial Sciences Institute, Yale University, West Haven, Connecticut, United States of America.
Spirochetes are a widely existing group of bacteria with a distinct morphology. Some spirochetes are important human pathogens that utilize periplasmic flagella to achieve motility and host infection. The motors that drive the rotation of periplasmic flagella have a unique spirochete-specific feature, termed the collar, crucial for the flat-wave morphology and motility of the Lyme disease spirochete Borrelia burgdorferi.
View Article and Find Full Text PDFPLoS Pathog
December 2024
Department of Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, Indiana, United States of America.
Borrelia (or Borreliella) burgdorferi, the causative agent of Lyme disease, is a motile and invasive zoonotic pathogen adept at navigating between its arthropod vector and mammalian host. While motility and chemotaxis are well known to be essential for its enzootic cycle, the role of each methyl-accepting chemotaxis proteins (MCPs) in the infectious cycle of B. burgdorferi remains unclear.
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