Results 71 to 80 of about 20,113 (181)

Kinetics of Antibody Responses in Rickettsia africae and Rickettsia conorii Infections [PDF]

Clinical and Vaccine Immunology, 2002
ABSTRACT African tick-bite fever, caused by Rickettsia africae , is the most common tick-borne rickettsiosis in sub-Saharan Africa. Mediterranean spotted fever due to Rickettsia conorii also occurs in the region but is more prevalent in Mediterranean countries.
Pierre-Edouard, Fournier, Mogens, Jensenius, Herman, Laferl, Sirka, Vene, Didier, Raoult   +4 more
openaire   +2 more sources

`Candidatus Rickettsia asemboensis’ and Wolbachia spp. in Ctenocephalides felis and Pulex irritans fleas removed from dogs in Ecuador

Parasites & Vectors, 2014
Background Flea-borne infections are distributed worldwide. Up to date there are no reports about microorganisms associated to fleas in Ecuador. Methods Seventy-one Pulex irritans and 8 Ctenocephalides felis fleas were removed from dogs in two Ecuadorian
José A Oteo, Aránzazu Portillo, Francisco Portero, Jorge Zavala-Castro, José M Venzal, Marcelo B Labruna   +5 more
doaj   +1 more source

Cellular immune response of Amblyomma sculptum and Amblyomma americanum to entomopathogenic fungi: Implications for biological tick control

Medical and Veterinary Entomology, Volume 40, Issue 3, Page 582-594, September 2026.
Amblyomma sculptum showed a plasmatocyte‐dominant haemocyte profile. Beauveria bassiana increased plasmatocytes and reduced granulocytes, whereas Metarhizium robertsii did not cause significant changes. Amblyomma americanum showed a granulocyte‐dominant haemocyte profile. Beauveria bassiana reduced total haemocytes and granulocytes. B.
Cárita de Souza Ribeiro‐Silva, Valesca Henrique Lima, Salorrane Miranda N. Pinto, Gustavo Felizardo S. Sandes, Victor Hugo Ribeiro Costa, Albert Mulenga, Adela S. Oliva Chavez, Éverton Kort Kamp Fernandes   +7 more
wiley   +1 more source

Decoding the Black Box of Fish Vaccines Efficacy in Basic and Applied Contexts

Reviews in Aquaculture, Volume 18, Issue 4, September 2026.
ABSTRACT Vaccines are the frontline defense in aquaculture, yet predicting their real‐world performance remains a tricky puzzle. Unlike terrestrial veterinary vaccines, fish vaccines largely operate through “Black Box” processes, where we observe the outcomes but rarely understand the underlying immune mechanisms. Laboratory trials, though informative,
Jiří Kyslík, Mikolaj Adamek, Tomáš Korytář   +2 more
wiley   +1 more source

EXPERIMENTAL RICKETTSIA TSUTSUGAMUSHI INFECTIONS IN DOGS

Japanese Journal of Medical Science and Biology, 1979
Dogs were infected intravenously and intradermally with the Gilliam and Karp strains of R. tsutsugamushi. Although the development of clinical signs was related to the dose of the organism, Gilliam-infected dogs developed severer infections than those infected with Karp. Specific antibodies were demonstrated in sera of experimentally infected dogs.
SHIRAI, AKIRA, HUXSOLL, DAVID L., MONTREY, RICHARD D., WERNER, ROBERT M., ARIMBALAM, S.   +4 more
openaire   +3 more sources

Molecular Characteristics of Rickettsia in Ticks Collected along the Southern Border of Mongolia

Pathogens, 2020
Tick-borne infections are a significant threat to public health, particularly in regions where individuals frequently enter tick habitats. Roughly 26% of the population in Mongolia practice nomadic pastoralism and are considered at high risk of exposure ...
Michael E. von Fricken, Matthew A. Voorhees, Jeffrey W. Koehler, Carmen Asbun, Brandon Lam, Barbara Qurollo, Kathryn M. Hogan, Uyanga Baasandagva, Battsetseg Jigjav, Randal J. Schoepp   +9 more
doaj   +1 more source

An Update on Advancement in Genomics Resources for Spiny Lobster Aquaculture Development

Reviews in Aquaculture, Volume 18, Issue 4, September 2026.
ABSTRACT The rapid advancement of high‐throughput sequencing technologies has transformed aquaculture genomics, enabling unprecedented insights into the biology and improvement of non‐model aquatic species. Among crustaceans, lobsters represent one of the most commercially valuable yet genomically underexplored taxa. This review synthesises the current
Courtney Lewis, Ahmad Farhadi, Susan Glendinning, Thomas Banks, Tara Kelly, Andrew G. Jeffs, Sandra Infante Villamil, John Breen, Jennifer M. Cobcroft, Arya Vazirzadeh, Basseer M. Codabaccus, Chris G. Carter, Quinn P. Fitzgibbon, Gregory G. Smith, Tomer Ventura   +14 more
wiley   +1 more source

Host, vector, and parasite dynamics: exploring intrinsic and extrinsic factors shaping tick‐borne filarial nematode transmission

Biological Reviews, Volume 101, Issue 4, Page 1779-1792, August 2026.
ABSTRACT Tick‐borne filarial nematodes are a complex and understudied group of parasites that rely on ticks for transmission in vertebrates. This review examines how intrinsic and extrinsic factors may influence the successful transmission of filarial nematodes in tick vectors, drawing insights from extensively studied haematophagous dipteran vector ...
Oluwaseun D. Ajileye, Gabriel L. Hamer, Sarah A. Hamer, Guilherme G. Verocai, Jessica E. Light   +4 more
wiley   +1 more source

Experimental infection with Rickettsia rickettsii in an Amblyomma dubitatum tick colony, naturally infected by Rickettsia bellii

Ticks and Tick-borne Diseases, 2014
Amblyomma dubitatum engorged females, naturally infected by Rickettsia bellii, were used to establish a laboratory colony. Larvae, nymphs, and adults were exposed to two strains of Rickettsia rickettsii by feeding on needle-inoculated guinea pigs, and thereafter reared on uninfected guinea pigs.
Renata K, Sakai, Francisco B, Costa, Tatiana E H, Ueno, Diego G, Ramirez, João F, Soares, Adivaldo H, Fonseca, Marcelo B, Labruna, Darci M, Barros-Battesti   +7 more
openaire   +2 more sources

Corticosteroids for Haemophagocytic Lymphohistiocytosis Secondary to Typhoid Fever: A Case Report

eJHaem, Volume 7, Issue 4, August 2026.
ABSTRACT Unlike haemophagocytic lymphohistiocytosis (HLH) induced by tuberculosis or rickettsial disease, there is no consensus for the treatment of HLH secondary to typhoid fever (Salmonella Typhi). After a short illustrative example, we searched among the previously described cases of HLH secondary to typhoid fever to determine: (i) Is the specific ...
Sonia Baumard, Aurélie Brunet, Isabelle Quatresous, Claire Pluchart, Yohan N'Guyen   +4 more
wiley   +1 more source