Results 51 to 60 of about 2,976 (171)

Reactivity of monoclonal antibodies to Rickettsia rickettsii with spotted fever and typhus group rickettsiae [PDF]

Journal of Clinical Microbiology, 1987
Analysis of 15 spotted fever group (SFG) and 2 typhus group strains of rickettsiae with a panel of monoclonal antibodies revealed a number of shared and unique epitopes of the 120- and 155-kilodalton surface proteins. All of the SFG strains but neither of the typhus group strains reacted with antibody to the lipopolysaccharidelike antigen of Rickettsia
R L, Anacker, R E, Mann, C, Gonzales
openaire   +2 more sources

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

Medical and Veterinary Entomology, EarlyView.
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

Spotted Fever Group Rickettsia sp. Closely Related to Rickettsia japonica, Thailand [PDF]

Emerging Infectious Diseases, 2009
Suggested citation for this article: Takada N, Fujita H, Kawabata H, Ando S, Sakata A, Takano A, et al. Spotted fever group Rickettsia sp. closely related to R. japonica, Thailand [letter]. Emerg Infect Dis [serial on the Internet]. 2009 Apr [date cited].
Nobuhiro, Takada, Hiromi, Fujita, Hiroki, Kawabata, Shuji, Ando, Akiko, Sakata, Ai, Takano, Udom, Chaithong   +6 more
openaire   +2 more sources

Mechanisms of immunity to Rickettsia and implications for vaccine development

Revista Colombiana de Ciencias Pecuarias, 2017
Immunity to spotted fever group Rickettsiae following primary infection prevents reinfection as judged by the absence of documented second infections after recovery.
David H. Walker
doaj  

Spotted Fever and Typhus Group Rickettsiae in Dogs and Humans, Mexico, 2022

Emerging Infectious Diseases, 2023
We found serologic evidence of spotted fever group Rickettsia in humans and dogs and typhus group Rickettsia in dogs in Reynosa, Mexico. Our investigation revealed serologic samples reactive to spotted fever group Rickettsia in 5 community members ...
Ricardo Palacios-Santana, Lihua Wei, Nadia A. Fernandez-Santos, Mario A. Rodriguez-Perez, Sergio Uriegas-Camargo, Nicole L. Mendell, Donald H. Bouyer, Jose Guillermo Estrada-Franco   +7 more
doaj   +1 more source

Korat‐Scrub Typhus Score: A Clinical Tool for Predicting Scrub Typhus in Patients With Acute Undifferentiated Febrile Illness

Tropical Medicine &International Health, EarlyView.
ABSTRACT Objective Scrub typhus is a major cause of acute undifferentiated febrile illness (AUFI) in the Asia–Pacific region. Nonspecific presentation, limited diagnostic accuracy and delayed treatment increase morbidity and mortality. This study aimed to develop a simple clinical score for early diagnosis in adults with AUFI. Methods A cross‐sectional
Wilawan Thipmontree, Ekkarat Wongsawat, Saowaluk Silpasakorn, Yupin Suputtamongkol   +3 more
wiley   +1 more source

Spotted Fever Group rickettsiae are the Dominant Pathogens in Parasitic Rhipicephalus microplus in Yunpan and Menghun, Xishuangbanna, Yunnan Province, China

Zoonoses
Distribution of the bacterium flora in ticks has an essential role in mapping and preventing local tick-borne diseases. The purpose of the current study was to map the bacterium flora and identify the main pathogens in ticks in grazing areas of Yunnan ...
Lin Zhang, Guangqing Miao, Xuexia Hou, Peng Wang, Ying Guo, Cunjuan Duan, Xiaona Yang, Qin Hao   +7 more
doaj   +1 more source

Age‐Related and Seasonal Variation in Malaria and Other Causes of Fever and Their Association With Clinical Outcomes in Southern Angola: A Hospital‐Based Study

Tropical Medicine &International Health, EarlyView.
ABSTRACT Background Acute febrile illnesses in sub‐Saharan Africa are often attributed to malaria, yet many patients test negative for malaria parasites. The aetiology of nonmalarial fevers remains understudied. Here, we examine likely causes of febrile illnesses and their association with poor clinical outcomes in Angola.
Helga E. M. Gonçalves, Maria Lina Antunes, Jorge Seixas, Marcelo U. Ferreira   +3 more
wiley   +1 more source

First report of spotted fever group Rickettsia in Cuba

Ticks and Tick-borne Diseases, 2016
Rickettsia amblyommii has been commonly detected in ticks worldwide and several reports suggest that this bacterium could be a human pathogen. In this study, 356 Amblyomma mixtum adults and 66 Amblyomma sp. nymphs were collected from a Cuban rural community and screened with Rickettsia -specific PCR primers followed by amplicon sequencing ...
Noda, Angel A., Rodríguez, Islay, Miranda, Jorge, Mattar, Salim, Cabezas-Cruz, Alejandro   +4 more
openaire   +3 more sources

Rickettsiales in South America: A Systematic Review of Their Molecular Detection and Distribution in Arthropods and Vertebrates

Public Health Challenges, Volume 5, Issue 2, June 2026.
ABSTRACT Bacteria of the order Rickettsiales comprise a diverse group of obligate intracellular microorganisms that are globally distributed and highly prevalent in tropical and subtropical regions. In South America, these bacteria have been associated with arthropod vectors, such as ticks, fleas, mites, lice, and certain dipterans, as well as with a ...
Cristian J. Zamorano‐Gómez, Paula A. Ossa‐López, Estefani T. Martínez‐Sánchez, Fredy A. Rivera‐Paéz   +3 more
wiley   +1 more source