International Medical Case Reports Journal (Feb 2020)
Detection of Rickettsia Endosymbiont Bemisia Tabaci in the Amputated Limbs of Three Buerger’s Disease Patients
Abstract
Bahare Fazeli, 1, 2 Ali Mirhosseini, 1 Zahra Hashemi, 1 Hossein Taheri 3 1Immunology Research Center, Inflammation and Inflammatory Diseases Division, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran; 2Vascular Independent Research and Education, European Foundation, Milan, Italy; 3Surgery Department, Farabi Hospital, Mashhad, IranCorrespondence: Bahare FazeliImmunology Research Center, Inflammation and Inflammatory Diseases Division, School of Medicine, Mashhad University of Medical Sciences, Mashhad, IranTel +98 51 38002379Fax +985138414499Email [email protected]: Until recently, the aetiology of Buerger’s disease (BD) has been unknown. Although there is a close relationship between BD and smoking, it cannot explain the low prevalence of BD among smokers or the disease’s geographical distribution. Infectious pathogens, such as Rickettsial infection, have also been suggested as the trigger of BD development, but this theory has neither been proven nor ruled out. The aim of this study was to evaluate the footprint of Rickettsial infection in tissue specimens obtained from amputees with Buerger’s disease. Forty-nine tissue biopsies were obtained from three below-the-knee amputees who also had a diagnosis of BD according to Olin’s criteria (between 14– 21 biopsies for each patient). After extraction of DNA from the tissue samples, the existence of 16srRNA was evaluated using a PCR test. The sequence of PCR products was evaluated using Geneious 11.1.2 software and NCBI blast. The 16srRNA was found in 3 to 7 samples from each patient. The sequence of the PCR products had a 98% homology with Rickettsia Tabaci. The sequences of the three patients were aligned, and no difference was found in the sequence of 16srRNA amongst the patients. Rickettsia Tabaci is a pathogen that infects tobacco leaves. Thus, BD might be an infectious disease for which smoking could be the route of pathogen entry into the bloodstreams of the sufferers. However, further studies are highly recommended to confirm this hypothesis.Keywords: thromboangiitis obliterans, Buerger’s disease, rickettsia, tobacco, smoking
