African tick bite fever, resulting from Rickettsia africae inoculation, is endemic in sub-Saharan Africa. We present a United States traveler with African tick bite fever 5 days after she returned from a mission trip to Zimbabwe. The patient exhibited symptomatic hypotension in addition to more typical findings, including fever, fatigue, and a necrotic eschar. The diagnosis was supported by histopathological findings and the patient's symptoms rapidly resolved with oral doxycycline therapy. We believe this case represents the first African tick bite fever diagnosis associated with symptomatic hypotension. This case additionally serves as a reminder of the importance of evaluating patient travel history.
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http://dx.doi.org/10.5070/D329662991 | DOI Listing |
Front Vet Sci
December 2024
Centre for Tropical Livestock Genetics and Health (CTLGH), Roslin Institute, University of Edinburgh, Edinburgh, United Kingdom.
One of the principal limitations on livestock productivity in sub-Saharan Africa is the constraining effect of infectious diseases, including tick-borne blood pathogens. Currently, diagnostic markers for these pathogens are species or genus specific, making it challenging to implement high-throughput screening methods. The aim of this study was to develop and validate a novel high-throughput diagnostic tool capable of detecting a range of important haemopathogens in livestock.
View Article and Find Full Text PDFTrop Med Int Health
January 2025
Programme in Emerging Infectious Diseases, Duke-National University of Singapore Medical School, Singapore, Singapore.
Background: Crimean-Congo hemorrhagic fever is a tick-borne zoonotic disease that may be severe and is present in many African countries. We aimed to understand the seroprevalence and risk for Crimean-Congo hemorrhagic fever virus in Tanzania by testing archived serum samples from patients enrolled in a prospective cohort study.
Methods: We prospectively enrolled febrile inpatients and outpatients from 2012 through 2014 at two referral hospitals in northern Tanzania.
J Med Entomol
December 2024
Department of Microbiology and Immunology, Institute for Human Infections and Immunity, University of Texas Medical Branch, Galveston, TX, USA.
Geographic ranges of ticks and tick-borne pathogens within North America are shifting due to environmental changes and human-driven activities, with species of public health concern presenting a multifaceted risk to human health. Innovative strategies and continued collaboration to control tick populations are needed to combat this growing threat. We conducted a scoping review of the literature to describe the nature of applied tick control research conducted in North America (Canada, Mexico, and the United States) to date, with the goal of describing key concepts and identifying gaps in this research area.
View Article and Find Full Text PDFAfrican swine fever (ASF) has become a major focus of research after spreading to four continents besides Africa. In its natural African ecosystem, the causative ASF virus (ASFV) is maintained by indigenous Suidae as natural reservoirs and hard tick vectors. However, in Sus scrofa domesticated breeds and wild boar, ASFV causes devastating disease, with mortalities reaching over 90%.
View Article and Find Full Text PDFArch Virol
December 2024
Department of Medical Entomology, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo, 162-8640, Japan.
Most members of the genus Orthonairovirus, represented by Crimean-Congo hemorrhagic fever virus and Nairobi sheep disease virus, are tick-borne, and some have become a public health concern in recent years. Here, we report the isolation and genetic and biological characterization of a new orthonairovirus, designated as "Iwanai Valley virus" (IWVV), from Ixodes ovatus ticks in Hokkaido, Japan. The amino acid sequence of the viral nucleoprotein (NP) was found to be 34-45% identical to those of known orthonairoviruses.
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