background preloader

Rickettsia en Afrique

Facebook Twitter

Ticks and Tick-Borne Diseases, 2020, 11 (3), Two novel Rickettsia species of soft ticks in North Africa: ‘Candidatus Rickettsia africaseptentrionalis’ and ‘Candidatus Rickettsia mauretanica’ Interdisciplinary Perspectives on Infectious Diseases 24/08/20 Serological Evidence of Rickettsia Exposure among Patients with Unknown Fever Origin in Angola, 2016-2017. Spotted fever group Rickettsia (SFGR) is one among the aetiologies that cause fever of unknown origin in Angola.

Interdisciplinary Perspectives on Infectious Diseases 24/08/20 Serological Evidence of Rickettsia Exposure among Patients with Unknown Fever Origin in Angola, 2016-2017

Despite their occurrence, there is little information about its magnitude in this country either because it is misdiagnosed or due to the lack of diagnostic resources. For this purpose, eighty-seven selected malaria- and yellow fever-negative serum specimens collected between February 2016 and March 2017 as part of the National Laboratory of Febrile Syndromes, from patients with fever (≥37.5°C) for at least 4 days and of unknown origin, were screened for Rickettsia antibodies through an immunofluorescence assay (IFA). Serological results were interpreted according to the 2017 guidelines for the detection of Rickettsia spp. Three seroreactive patients had detectable IgM antibodies to Rickettsia with an endpoint titre of 32 and IgG antibodies with endpoint titres of 128 and 256. 1. 2.

Am J Trop Med Hyg. 2018 Jul;99(1): Diagnosis of Spotted Fever Group Rickettsioses in U.S. Travelers Returning from Africa, 2007-2016. New Microbes and New Infections Volume 27, January 2019, Seasonal distribution of Rickettsia spp. in ticks in northeast Algeria. MEDICAL AND VETERINARY ENTOMOLOGY 03/11/18 Fleas from domestic dogs and rodents in Rwanda carry Rickettsia asembonensis and Bartonella tribocorum. Introduction Fleas (Siphonaptera) transmit vector‐borne disease pathogens worldwide (Walker et al., 1996; Eisen & Gage, 2012).

MEDICAL AND VETERINARY ENTOMOLOGY 03/11/18 Fleas from domestic dogs and rodents in Rwanda carry Rickettsia asembonensis and Bartonella tribocorum

Among mammalian hosts harbouring fleas, rodents play a dominant role as a result of their close associations with humans, especially in populous rural areas (Gundi et al., 2012). With the exception of Yersinia pestis (Enterobacteriales: Enterobacteriaceae), the cause of plague, flea‐borne pathogens, such as Bartonella spp. and Rickettsia spp., remain neglected in sub‐Saharan Africa (Kumsa et al., 2014; Leulmi et al., 2014). Plague is now absent from several sub‐Saharan countries such as Rwanda; nevertheless, knowledge of the distribution of potential flea vectors of Y. pestis is relevant because of its potential re‐emergence from endemic regions such as the Democratic Republic of Congo (Stenseth et al., 2008; Amatre et al., 2009).

Materials and methods Flea specimens Morphological identification of fleas Extraction of genomic DNA Results Discussion Acknowledgements. PLOS 27/11/17 Seroprevalence of rickettsial infections and Q fever in Bhutan. Abstract Background With few studies conducted to date, very little is known about the epidemiology of rickettsioses in Bhutan.

PLOS 27/11/17 Seroprevalence of rickettsial infections and Q fever in Bhutan

Due to two previous outbreaks and increasing clinical cases, scrub typhus is better recognized than other rickettsial infections and Q fever. Methodology A descriptive cross-sectional serosurvey was conducted from January to March 2015 in eight districts of Bhutan. Results.

Rickettsies au Kenya

PLOS 21/03/16 Diversity of Bartonella and Rickettsia spp. in Bats and Their Blood-Feeding Ectoparasites from South Africa and Swaziland. Abstract In addition to several emerging viruses, bats have been reported to host multiple bacteria but their zoonotic threats remain poorly understood, especially in Africa where the diversity of bats is important.

PLOS 21/03/16 Diversity of Bartonella and Rickettsia spp. in Bats and Their Blood-Feeding Ectoparasites from South Africa and Swaziland

Here, we investigated the presence and diversity of Bartonella and Rickettsia spp. in bats and their ectoparasites (Diptera and Siphonaptera) collected across South Africa and Swaziland. We collected 384 blood samples and 14 ectoparasites across 29 different bat species and found positive samples in four insectivorous and two frugivorous bat species, as well as their Nycteribiidae flies. Phylogenetic analyses revealed diverse Bartonella genotypes and one main group of Rickettsia, distinct from those previously reported in bats and their ectoparasites, and for some closely related to human pathogens.

Our results suggest a differential pattern of host specificity depending on bat species. Parasites & Vectors 31/05/17 Serological and molecular detection of spotted fever group Rickettsia in a group of pet dogs from Luanda, Angola. To the best of our knowledge, this study shows for the first time the presence of SFGR in dogs in Luanda.

Parasites & Vectors 31/05/17 Serological and molecular detection of spotted fever group Rickettsia in a group of pet dogs from Luanda, Angola

A considerably lower prevalence of IgG antibodies against Rickettsia spp. was found in dogs when compared with other studies that assessed serum samples from dogs [11] or people [16]. On the other hand, the molecular prevalence in the present study was also lower than in another study that assessed Rickettsia spp. in dogs from Nigeria [12]. Nevertheless, the low prevalence could be related to the fact that tick species that were infesting this group of dogs had a low prevalence of rickettsial infection.

CDC - OCT 2013 - Rickettsia africae in Amblyomma variegatum Ticks, Uganda and Nigeria. Highlight and copy the desired format.

CDC - OCT 2013 - Rickettsia africae in Amblyomma variegatum Ticks, Uganda and Nigeria

Centre national de référence des Rickettsia, Coxiella et Bartonella - IHU Méditerranée Infection.

AP-HM/AMU. Des scientifiques marseillais ont découvert que le moustique vecteur du paludisme pouvait transmettre la bactérie Rickettsia felis, responsable en Afrique de fièvres d’origine inconnue. – guatemalt

Ticks Tick Borne Dis. 2016 Feb 8. Molecular Diagnosis of Rickettsia Infection in Patients from Tunisia. Q Fever, Scrub Typhus, and Rickettsial Diseases in Children, Kenya, 2011–2012 - Volume 22, Number 5—May 2016. Author affiliations: Naval Medical Research Center, Silver Spring, Maryland, USA (A.N.

Q Fever, Scrub Typhus, and Rickettsial Diseases in Children, Kenya, 2011–2012 - Volume 22, Number 5—May 2016

Maina, C.M. CDC EID - Volume 21, Number 4—April 2015 High Seroprevalence of Antibodies against Spotted Fever and Scrub Typhus Bacteria in Patients with Febrile Illness, Kenya. Author affiliations: Walter Reed Project/Kenya Medical Research Institute, Kisumu, Kenya (J.W.

CDC EID - Volume 21, Number 4—April 2015 High Seroprevalence of Antibodies against Spotted Fever and Scrub Typhus Bacteria in Patients with Febrile Illness, Kenya

Thiga, B.K. Mutai, W.K. PARASITES AND VECTORS 31/12/13 Multispacer typing of Rickettsia isolates from humans and ticks in Tunisia revealing new genotypes. CDC EID - NOV 2013 - Common Epidemiology of Rickettsia felis Infection and Malaria, Africa. PARASITES & VECTORS 22/09/14 First molecular detection of Rickettsia africae in ticks from the Union of the Comoros. CDC EID - Volume 20, Number 10—October 2014. Au sommaire notamment: Borrelia garinii and Rickettsia monacensis in Ixodes ricinus Ticks, Algeria. Suggested citation for this article To the Editor: Lyme disease (Lyme borreliosis) is caused by a group of related spirochetes (Borrelia burgdorferi sensu lato) that include ≥11 species (1).

CDC EID - Volume 20, Number 10—October 2014. Au sommaire notamment: Borrelia garinii and Rickettsia monacensis in Ixodes ricinus Ticks, Algeria

In northern Africa, the main vector of Lyme disease in Europe (Ixodes ricinus ticks) is also present, and this disease has been suspected to be present in this region of Africa (2). Twenty-one cases of Lyme disease were reported in Algiers, Algeria, during 1996–1999 (3). However, these cases were diagnosed by detection of only serum antibodies against B. burgdorferi by ELISA without confirmation by Western blotting. CDC EID - Volume 21, Number 2—February 2015 Novel Candidatus Rickettsia Species Detected in Nostril Tick from Human, Gabon, 2014. Author affiliations: University Hospital Ramón y Cajal, Madrid, Spain (R.

CDC EID - Volume 21, Number 2—February 2015 Novel Candidatus Rickettsia Species Detected in Nostril Tick from Human, Gabon, 2014

Lopez-Velez, F.F. Norman, J.A. Pérez-Molina); Hospital San Pedro–Center of Biomedical Research of La Rioja, Logroño, Spain (A.M. Palomar, J.A. Oteo, A. Suggested citation for this article Abstract. CDC EID - MARS 2010 – Rickettsia africae, Westen Africa. CDC EID - JANV 2011 - Emergence of Rickettsia africae, Oceania. Author affiliations: Author affiliations: Université de la Méditerranée, Marseille, France (C. Eldin, O. Mediannikov, B. Davoust, D. Raoult, P. Parola); French Army Health Service, Marseille (B. Suggested citation for this article Abstract. CDC EID JUILLET 2008 Spotted Fever Group Rickettsiae in Ticks, Morocco.

CDC EID - OCT 2012 - Rickettsia felis in Aedes albopictus Mosquitoes, Libreville, Gabon. Skip directly to local search Skip directly to A to Z list Skip directly to navigation Skip directly to site content Skip directly to page options CDC Home CDC 24/7: Saving Lives. Protecting People.™ <div class="noscript"> Note: Javascript is disabled or is not supported by your browser. Emerging Infectious Disease ISSN: 1080-6059 Volume 18, Number 10—October 2012 Letter. CDC EID - FEV 2013 - Au sommaire: High Seroprevalence for Typhus Group Rickettsiae, Southwestern Tanzania. Skip directly to local search Skip directly to A to Z list Skip directly to navigation Skip directly to site content Skip directly to page options CDC Home CDC 24/7: Saving Lives. Protecting People. PLOS 21/03/16 Diversity of Bartonella and Rickettsia spp. in Bats and Their Blood-Feeding Ectoparasites from South Africa and Swaziland.