Molecular detection of Coccidioides spp. from environmental samples in Baja California: linking Valley Fever to soil and climate conditions

Baptista‐Rosas, Raúl C.; Catalán-Dibene, Jovani; Romero‐Olivares, Adriana L.; Hinojosa‐Corona, Alejandro; Cavazos, Tereza; Riquelme, Meritxell

doi:10.1016/j.funeco.2011.08.004

Cited by 41 publications

(38 citation statements)

References 40 publications

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“…More broadly, international collaboration on valley fever surveillance would improve disease management, especially in countries with cases or where Coccidioides spp. has been detected; this includes countries in North, Central, and South America (Baptista‐Rosas et al, ; Campins, ; de Macêdo et al, ; Eulálio et al, ). For example, Coccidioides spp.…”

Section: Discussionmentioning

confidence: 99%

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Coccidioidomycosis Dynamics in Relation to Climate in the Southwestern United States

et al. 2018

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Valley fever is endemic to the southwestern United States. Humans contract this fungal disease by inhaling spores of Coccidioides spp. Changes in the environment can influence the abundance and dispersal of Coccidioides spp., causing fluctuations in valley fever incidence. We combined county‐level case records from state health agencies to create a regional valley fever database for the southwestern United States, including Arizona, California, Nevada, New Mexico, and Utah. We used this data set to explore how environmental factors influenced the spatial pattern and temporal dynamics of valley fever incidence during 2000–2015. We compiled climate and environmental geospatial data sets from multiple sources to compare with valley fever incidence. These variables included air temperature, precipitation, soil moisture, surface dust concentration, normalized difference vegetation index, and cropland area. We found that valley fever incidence was greater in areas with warmer air temperatures and drier soils. The mean annual cycle of incidence varied throughout the southwestern United States and peaked following periods of low precipitation and soil moisture. From year‐to‐year, however, autumn incidence was higher following cooler, wetter, and productive springs in the San Joaquin Valley of California. In southcentral Arizona, incidence increased significantly through time. By 2015, incidence in this region was more than double the rate in the San Joaquin Valley. Our analysis provides a framework for interpreting the influence of climate change on valley fever incidence dynamics. Our results may allow the U.S. Centers for Disease Control and Prevention to improve their estimates of the spatial pattern and intensity of valley fever endemicity.

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Section: Discussionmentioning

confidence: 99%

“…For example, Coccidioides spp. has been detected in Mexico at multiple locations over 70 years (Baptista‐Rosas et al, ; Sotomayor et al, ). An environmental niche model of Coccidioides spp.…”

Section: Discussionmentioning

confidence: 99%

Coccidioidomycosis Dynamics in Relation to Climate in the Southwestern United States

et al. 2018

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“…PCR using Coccidioides-specific ribosomal DNA (rDNA) primers in a nested reaction protocol has allowed detection in some cases (45,46), although the sensitivity of detection is not clear. This approach, while useful for identifying positive sites, does not allow for molecular or phenotypic analysis.…”

Section: Coccidioides In the Environmentmentioning

confidence: 99%

“…Data from Kern County in California show a single peak of infection associated with dry periods after the winter rainy season, with relatively equal rates during the rest of the year (67,68). There is a general lack of information about climatic factors affecting rates of disease in the remainder of the area of endemicity, specifically in Mexico and South America (45,69).…”

Section: Coccidioides In the Environmentmentioning

confidence: 99%

Recent Advances in Our Understanding of the Environmental, Epidemiological, Immunological, and Clinical Dimensions of Coccidioidomycosis

et al. 2013

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SUMMARY Coccidioidomycosis is the endemic mycosis caused by the fungal pathogens Coccidioides immitis and C. posadasii . This review is a summary of the recent advances that have been made in the understanding of this pathogen, including its mycology, genetics, and niche in the environment. Updates on the epidemiology of the organism emphasize that it is a continuing, significant problem in areas of endemicity. For a variety of reasons, the number of reported coccidioidal infections has increased dramatically over the past decade. While continual improvements in the fields of organ transplantation and management of autoimmune disorders and patients with HIV have led to dilemmas with concurrent infection with coccidioidomycosis, they have also led to advances in the understanding of the human immune response to infection. There have been some advances in therapeutics with the increased use of newer azoles. Lastly, there is an overview of the ongoing search for a preventative vaccine.

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“…The study by Colson et al [27] expands recent investigations on the molecular identification of Coccidioides in environmental samples with an optimized multiplex PCR method in Bakersfield, California [28], a semi-nested PCR using specific primer in Brazil [29], a nested PCR followed by a diagnostic PCR designed to amplify the internal transcribed spacer (ITS) 2 region in Baja California [30], and an endpoint-nested PCR followed by ITS1 and ITS2 amplification in Dinosaur National Monument, Utah [31]. Thus, there is a volume of rigorous laboratory data that confirm the occurrence of Coccidioides DNA in various locations in the endemic zones.…”

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confidence: 99%

The Powers and Perils of PCR in the Search for the Natural Reservoirs of Coccidioides Species

Chaturvedi

2017

Mycopathologia

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Molecular detection of Coccidioides spp. from environmental samples in Baja California: linking Valley Fever to soil and climate conditions

Cited by 41 publications

References 40 publications

Coccidioidomycosis Dynamics in Relation to Climate in the Southwestern United States

Coccidioidomycosis Dynamics in Relation to Climate in the Southwestern United States

Recent Advances in Our Understanding of the Environmental, Epidemiological, Immunological, and Clinical Dimensions of Coccidioidomycosis

The Powers and Perils of PCR in the Search for the Natural Reservoirs of Coccidioides Species

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