Results 51 to 60 of about 3,906 (174)

Brazilian spotted fever in cart horses in a non-endemic area in Southern Brazil Febre maculosa brasileira em cavalo de carroceiro em área não-endêmica no Sul do Brasil

Revista Brasileira de Parasitologia Veterinária, 2010
Brazilian Spotted Fever (BSF) is an often fatal zoonosis caused by the obligate intracellular bacterium Rickettsia rickettsii. The disease is generally transmitted to humans by Amblyomma spp. ticks. Serological evidence of past infection by R. rickettsii
Marta Cristina Diniz de Oliveira Freitas, Marcelly Grycajuk, Marcelo Beltrão Molento, José Bonacin, Marcelo Bahia Labruna, Richard de Campos Pacheco, Jonas Moraes-Filho, Ivan Deconto, Alexander Welker Biondo   +8 more
doaj   +1 more source

Sufficient reproduction numbers to prevent recurrent epidemics

Methods in Ecology and Evolution, Volume 16, Issue 6, Page 1186-1200, June 2025.
Abstract Current practice in the design and evaluation of control measures in disease ecology and epidemiology, including vaccination, is largely based on reproduction numbers (RNs), which represent prognostic indices of long‐term disease transmission, both in naïve populations (basic RN) and in the presence of prior exposure or infection containment ...
Lorenzo Mari, Cristiano Trevisin, Andrea Rinaldo, Marino Gatto   +3 more
wiley   +1 more source

Study of infection by Rickettsiae of the spotted fever group in humans and ticks in an urban park located in the City of Londrina, State of Paraná, Brazil

Revista da Sociedade Brasileira de Medicina Tropical, 2011
INTRODUCTION: Spotted fevers are emerging zoonoses caused by Rickettsia species in the spotted fever group (SFG). Rickettsia rickettsii is the main etiologic agent of Brazilian spotted fever (BSF) and it is transmitted by Amblyomma spp. ticks.
Roberta Santos Toledo, Katia Tamekuni, Mauro de Freitas Silva Filho, Valeska Bender Haydu, Richard Campos Pacheco, Marcelo Bahia Labruna, John Stephen Dumler, Odilon Vidotto   +7 more
doaj   +1 more source

Imaging Diagnosis—Sonographic Features of Bilateral Renal Lymphangiectasia in an Azotemic Dog

Veterinary Radiology &Ultrasound, Volume 66, Issue 3, May 2025.
ABSTRACT A 9‐year‐old male neutered Labrador Retriever was referred for azotemia and bilateral renomegaly. An abdominal ultrasound revealed severe bilateral renomegaly with septated subcapsular cystic anechoic lesions, consistent with renal lymphangiectasia. Despite conservative management, the patient died.
Yu Wang, Wilfried Mai, Lisa Dourmashkin, Victoria Leopardi, Hayley Amerman   +4 more
wiley   +1 more source

Multiple Introductions of the Asian Longhorned Tick (Haemaphysalis longicornis) to the United States Revealed Using Mitogenomics

Ecology and Evolution, Volume 15, Issue 4, April 2025.
The Asian longhorned tick, Haemaphysalis longicornis, is a significant global vector and threat to both agriculture and public health. Formerly known only in the Eastern Hemisphere, parthenogenetic ALT have been reported from 20 states across the eastern and central US, with a pattern of expansion suggestive of multiple distinct populations.
Zoe E. Narvaez, Andrea M. Egizi, Michael J. Yabsley, Alec T. Thompson, Mohamed Moustafa, Erika Alt, Matthew Bickerton, Kim Bjorgo, Rebecca A. Butler, Alexandra Cumbie, Gillian Eastwood, Richard C. Falco, Dina M. Fonseca, Jun Hang, Vanessa L. Harper, Nicole Lewis, Jan Lovy, Lauren P. Maestas, Thomas N. Mather, Ryo Nakao, James L. Occi, Tadhgh Rainey, Melanie Sal, Craig A. Stoops, Rebecca T. Trout‐Fryxell, Wes Watson, Nicole E. Wagner, Aihua Zheng, Perot Saelao, Dana C. Price   +29 more
wiley   +1 more source

Febre maculosa: isolamento de Rickettsia em amostra de biópsia de pele Spotted fever: Rickettsia isolation in skin biopsy sample

Revista do Instituto de Medicina Tropical de São Paulo, 1992
Presença de Rickettsia na pele de doente de Febre Maculosa foi evidenciada por inoculação intraperitoneal em cobaio. O diagnóstico sorológico por imunoflüorescência indireta revelou diferença de título de anticorpos específicos para Rickettsia rickettsii,
Heloisa Helana B. Melles, Silvia Colombo, Marcos Vinícius da Silva   +2 more
doaj   +1 more source

Convergence Retraction Nystagmus Secondary to Central Nervous System Disseminated Coccidioides Immitis Infection in a Dog

Veterinary Medicine and Science, Volume 11, Issue 2, March 2025.
This report describes a canine patient with central nervous system–disseminated Coccidioides immitis infection that presented with the sole clinical abnormality of convergence‐retraction nystagmus (CRN). Brain MRI was performed with imaging characteristics, positive fungal serology and positive response to therapy confirming diagnosis.
Lydia Lovato, Trevor Moore, Laura Stainback, Scott B. Plummer, Kim E. Knowles, Jaime Sage   +5 more
wiley   +1 more source

Serologic evidence of the exposure of small mammals to spotted-fever Rickettsia and Rickettsia bellii in Minas Gerais, Brazil

Journal of Infection in Developing Countries, 2016
Introduction: Sources of pathogenic Rickettsia in wildlife are largely unknown in Brazil. In this work, potential tick vectors and seroreactivity of small mammals against four spotted-fever group Rickettsia (R. rickettsii, R. parkeri, R.
Marcella Gonçalves Coelho, Vanessa do Nascimento Ramos, Jean Ezequiel Limongi, Elba Regina Sampaio de Lemos, Alexandro Guterres, Sócrates Fraga da Costa Neto, Tatiana Rozental, Cibele Rodrigues Bonvicino, Paulo Sérgio D'Andrea, Jonas Moraes-Filho, Marcelo Bahia Labruna, Matias Pablo Juan Szabó   +11 more
doaj   +1 more source

Variable effects of wildlife and livestock on questing tick abundance across a topographical–climatic gradient

Ecosphere, Volume 16, Issue 2, February 2025.
Abstract Large‐bodied wild ungulates are declining worldwide, while domestic livestock continue to increase in abundance. Such changes in large herbivore communities should have strong effects on the control of ticks and tick‐borne disease as they can indirectly modify habitat and directly serve as final hosts for ticks' lifecycles.
Stephanie Copeland, Samantha Sambado, Devyn Orr, An Bui, Andrea Swei, Hillary S. Young   +5 more
wiley   +1 more source

Primary isolation of spotted fever group rickettsiae from Amblyomma cooperi collected from Hydrochaeris hydrochaeris in Brazil

Memorias do Instituto Oswaldo Cruz, 1996
This paper reports the first isolation of a spotted fever group rickettsia from an Amblyomma cooperi ixodid collected from a capybara (Hydrochaeris hydrochaeris) in an endemic area of spotted fever in the County of Pedreira, State of São Paulo, Brazil ...
Elba Regina Sampaio de Lemos, Heloísa Helena Barbosa Melles, Sílvia Colombo, Raimundo Diogo Machado, José Rodrigues Coura, Maria Angélica Arpon Guimarães, Selênio R Sanseverino, Aline Moura   +7 more
doaj   +1 more source