Prevalence of American trypanosomiasis (Chagas disease) among dogs in Oklahoma

Bradley, Kristy; Bergman, David; Woods, J. Paul; Crutcher, James M.; Kirchhoff, Louis V.

doi:10.2460/javma.2000.217.1853

Cited by 86 publications

(71 citation statements)

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“…Reports that triatomine contact with domestic dogs presents an increased risk of Chagas disease transmission to humans points toward the need for increased collaboration between epidemiologists, entomologists, and veterinarians in future disease risk predictions (Barr et al, 1995;Bradley et al, 2000;Beard et al, 2003;Enger et al, 2004;Crisante et al, 2006). The results presented here might serve as insight for comprehensive fine-scale studies of areas that are in the margins of the defined higher-risk ranges through a GIS model that utilizes weighted variables acquired from landscape, ecological, and environmental data.…”

Section: Discussionmentioning

confidence: 99%

“…Triatomine samples and autochthonous Chagas disease cases and their proximity to populated areas in the United States. Data sources: Usinger, 1944;Woody and Woody, 1955;Anonymous, 1956;Sjogren and Ryckman, 1966;Lent and Wygodzinsky, 1979;Betz et al, 1984;Ryckman, 1984;Schiffler et al, 1984;Navin et al, 1985;Ochs et al, 1996;Bradley et al, 2000;Herwaldt et al, 2000;Yabsley and Noblet, 2002;ESRI, 2005;NOAA-NGDC, 2007. and 16%, respectively. As is evident from Figure 3, the range at higher risk due to a temperatureinduced increase in triatomine activity will expand northward in the Midwest and north along the Atlantic coast, placing a considerably larger population in the higher risk range for disease transmission.…”

Section: Areas Of Increased Risk Of Chagas Disease Transmissionmentioning

confidence: 99%

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The potential for emergence of Chagas disease in the United States

et al. 2008

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Abstract. To determine the risk for Chagas disease (American trypanosomiasis) in the United States, the characteristics that make the triatomine vector effective and the areas most at risk for transmission were delineated. In addition, the status of Chagas disease awareness among physicians in areas with a potential risk for the disease was determined. A geographical information system (GIS) was used to analyze three triatomine species within the United States known to harbor Trypanosoma cruzi and that exhibit qualities of domesticity. An analysis of the minimum temperature threshold for increased triatomine activity delineates the current population at increased risk, and by incorporating temperature predictions for 2030, the population at risk under a future climate scenario was also delineated. Considering both environmental and social factors, a vignette-based physician survey, based on the results of the GIS analysis, was used to gauge the level of awareness of Chagas disease within the delineated higher risk range.

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Section: Discussionmentioning

confidence: 99%

Section: Areas Of Increased Risk Of Chagas Disease Transmissionmentioning

confidence: 99%

The potential for emergence of Chagas disease in the United States

et al. 2008

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“…In certain areas of that state, up to 43% of the raccoons were infected (Pietrzak & Pung 1998). Closer to the human domestic environment, Bradley et al (2000) have shown that 3.6% of rural hunting dogs in Oklahoma were seropositive for T. cruzi. Human infection from the sylvatic environment can occur either from sudden migration of hemiptera to the human environment, forced by the destruction of forests (Maguire et al 1986) or by the ingestion of foods contaminated by hemipteran faeces or crushed insects (Shikanai-Yasuda et al 1991, da Silva Valente et al 1999).…”

Section: The Ecobiology Of T Cruzimentioning

confidence: 99%

Trypanosoma cruzi: ancestral genomes and population structure

Pena

Machado

Macedo

2009

Mem. Inst. Oswaldo Cruz

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“…Several studies have shown the presence of the insect vector as well as infection of domestic dogs and wild animals in the US (Meurs et al 1998, Bradley et al 2000, Beard et al 2003, Yabsley and Noblet 2002. Further, due to signifi cant increases in immigration to the USA and Canada from endemic countries and perinatal transmission, it is estimated that ∼ 100, 000 people residing in USA may be infected with T. cruzi.…”

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confidence: 99%

An overview of chagasic cardiomyopathy: pathogenic importance of oxidative stress

Zacks

Wen

Vyatkina

et al. 2005

An. Acad. Bras. Ciênc.

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There is growing evidence to suggest that chagasic myocardia are exposed to sustained oxidative stressinduced injuries that may contribute to disease progression. Pathogen invasion-and replication-mediated cellular injuries and immune-mediated cytotoxic reactions are the common source of reactive oxygen species (ROS) in infectious etiologies. However, our understanding of the source and role of oxidative stress in chagasic cardiomyopathy (CCM) remains incomplete. In this review, we discuss the evidence for increased oxidative stress in chagasic disease, with emphasis on mitochondrial abnormalities, electron transport chain dysfunction and its role in sustaining oxidative stress in myocardium. We discuss the literature reporting the consequences of sustained oxidative stress in CCM pathogenesis.Key words: chagasic cardiomyopathy, reactive oxygen species, inflammation, mitochondria, oxidant/antioxidant status, oxidative damage. PARASITE, VECTOR AND TRANSMISSIONTrypanosoma cruzi, a parasitic protozoan of the ancient branch of eukaryotes (Kingdom Eukaryota, Order Kinetoplastida), is the etiological agent of Chagas disease in humans (Miles 2003). Currently, the World Health Organization estimates that 11-18 million individuals are infected worldwide (WHO 2002). Transmission of T. cruzi occurs predominantly via insect vectors of the subfamily Triatoma, family Reduviidae, referred to as " kissing bugs". Residing in the peridomestic habitat of mud-thatch Correspondence to: Nisha Garg Ph.D. E-mail: nigarg@utmb.edu houses in rural areas (Mott et al. 1978), Triatoma infestans in South America, Rhodnius prolixus in Venezuela, Colombia and Central America (Schofi eld and Dias 1999), and Triatoma barberi in Mexico (Guzman 2001), are the most common species responsible for transmission. Improvements in housing conditions and vector control measures instituted by the Southern Cone Initiative in 1991 have contributed to a decline in transmission in endemic countries (Schofi eld and Dias 1999). However, concern remains that reinfestation of homes by secondary sylvatic vectors, e.g. Triatoma sordida, will compromise the long-term effi cacy of vector control measures in Brazil and other Southern American countries (Monteiro et al. 2001, WHO 2002. Blood transfusion and organ transplantation represent further routes of T. cruzi transmission. Although many countries in Latin America screen blood donations for T. cruzi, infection rates ranging from 0.1% to 24.4% are estimated to occur through transfusion (WHO 2002).In the U.S., vector-transmitted human infections have been reported in the southern States (Ochs et al. 1996, Herwaldt et al. 2000. Several studies have shown the presence of the insect vector as well as infection of domestic dogs and wild animals in the US (Meurs et al. 1998, Bradley et al. 2000, Beard et al. 2003, Yabsley and Noblet 2002. Further, due to signifi cant increases in immigration to the USA and Canada from endemic countries and perinatal transmission, it is estimated that ∼ 100, 000 people residing...

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Prevalence of American trypanosomiasis (Chagas disease) among dogs in Oklahoma

Cited by 86 publications

References 14 publications

The potential for emergence of Chagas disease in the United States

The potential for emergence of Chagas disease in the United States

Trypanosoma cruzi: ancestral genomes and population structure

An overview of chagasic cardiomyopathy: pathogenic importance of oxidative stress

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