Despite the increasing awareness of the importance of emerging vector-borne diseases, human tick-borne diseases, particularly rickettsial infections, are overlooked, especially in the countries such as Sudan with limited resources to perform molecular-based surveys. This study aimed at detection and genetic characterization of Rickettsia spp. in ticks collected from Sudan. The samples were first screened for the presence of rickettsial agents by gltA real-time PCR and subsequently characterized by gltA and ompA PCR and size-based multispacer typing. The results demonstrated the wide distribution of Rickettsia africae and/or closely related species across Sudan. The results of this report highlight the need for careful consideration of rickettsial infections in patients with nonmalarial febrile illness in this country. Nationwide surveillance on ticks associated with human rickettsial infections in Sudan is warranted.
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http://dx.doi.org/10.1089/vbz.2014.1748 | DOI Listing |
PLoS One
January 2025
Department of Pathology and Parasitology, Chittagong Veterinary and Animal Sciences University (CVASU), Chittagong, Bangladesh.
The three rickettsial parasites- Babesia bovis, Theileria annulata and Anaplasma Marginale are responsible for causing Babesiosis, Theileriosis and Anaplasmosis among cattle. These diseases exist due to spreading of infected ticks. A large number of cattle were found to suffer from mixed infections caused by the three parasites at the same time.
View Article and Find Full Text PDFIDCases
December 2024
Department of General Internal Medicine, Uonuma Kikan Hospital, Minamiuonuma, Niigata 949-7302, Japan.
Scrub typhus (tsutsugamushi disease) is an acute febrile illness caused by , often found in Asia and Oceania. The presence of an eschar, characterized by a crust, is a key diagnostic finding. Many symptoms of this disease are already known, however reactive arthritis following scrub typhus is very rare.
View Article and Find Full Text PDFPLoS Negl Trop Dis
January 2025
Center for Infection and Molecular Medicine, Amsterdam UMC location University of Amsterdam, Amsterdam, the Netherlands.
The global priorities in the field of infectious diseases are constantly changing. While emerging viral infections have regularly dominated public health attention, which has only intensified after the COVID-19 pandemic, numerous bacterial diseases have previously caused, and continue to cause, significant morbidity and mortality-deserving equal attention. Three potentially life-threatening endemic bacterial diseases (leptospirosis, melioidosis, and rickettsioses) are a huge public health concern especially in low- and middle-income countries.
View Article and Find Full Text PDFVaccine
January 2025
Center of Excellence for Vector-Borne Diseases, Department of Diagnostic Medicine/Pathobiology, College of Veterinary Medicine, Kansas State University, Manhattan, KS 66506, United States of America; Department of Veterinary Pathobiology, College of Veterinary Medicine, Bond Life Sciences Center, University of Missouri, Columbia, MO 65211, United States of America. Electronic address:
Ehrlichia chaffeensis, a tick transmitted rickettsial bacterium, causes monocytic ehrlichiosis in humans and dogs. Earlier, we demonstrated that dogs immunized with a mutant strain of E. chaffeensis having a functional disruption in the gene encoding the phage head-to-tail connector protein serves as a modified live vaccine (MLAV) capable of inducing immunity against intravenous and tick-transmitted infection challenges within one month of vaccination.
View Article and Find Full Text PDFPLoS One
January 2025
Department of Pathology, University of Texas Medical Branch, Galveston, Texas, United States of America.
Tick-borne spotted fever rickettsioses (SFRs) continue to cause severe illness and death in otherwise-healthy individuals due to lack of a timely and reliable diagnostic laboratory test. We recently identified a diagnostic biomarker for SFRs, the putative N-acetylmuramoyl-l-alanine amidase RC0497. Here, we developed a prototype laboratory test that targets RC0497 for diagnosis of SFRs.
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