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Nov 2, 2020 · Proportion of fatal and nonfatal cases of Rocky Mountain spotted fever in Sonora, Mexico, 2015–2018, among all cases (Map A) and persons aged < 18 years (Map B).
- Diego I. Álvarez-López, Estefanía Ochoa-Mora, Kristen Nichols Heitman, Alison M. Binder, Gerardo Álv...
- 10.4269/ajtmh.20-0854
- 2021
- Am J Trop Med Hyg. 2021 Jan; 104(1): 190-197.
Aug 22, 2022 · INTRODUCTION. Rocky Mountain spotted fever (RMSF) is a potentially fatal tickborne disease (TBD) caused by Rickettsia rickettsii that, if left untreated, can cause widespread vasculitis resulting in multiple organ failure and death. 1 RMSF has nonspecific early symptoms including fever and headaches with most patients developing a rash at some point in the illness. 2 However, during 2009 ...
INTRODUCTION. Rocky Mountain spotted fever (RMSF) is a serious bacterial disease caused by Rickettsia rickettsii.It is transmitted to humans through tick bites. Medical researchers in both Mexico and the United States have observed that RMSF morbidity and mortality are disproportionately higher in low-income communities. 1 – 3 Multiple factors may influence vulnerability in low-income ...
- Pablo A. Reyes-Castro, Kacey C. Ernst, Kathleen R. Walker, Mary H. Hayden, Gerardo Alvarez-Hernandez
- 10.4269/ajtmh.20-0181
- 2021
- Am J Trop Med Hyg. 2021 Jan; 104(1): 184-189.
Mar 31, 2017 · Rocky Mountain spotted fever, a tick-borne zoonosis caused by Rickettsia rickettsii, is among the most lethal of all infectious diseases in the Americas. In Mexico, the disease was first described during the early 1940s by scientists who carefully documented specific environmental determinants responsible for devastating outbreaks in several communities in the states of Sinaloa, Sonora ...
- Gerardo Álvarez-Hernández, Jesús Felipe González Roldán, Néstor Saúl Hernández Milan, R Ryan Lash, C...
- 2017
- Pollen Data Used in Analysis
- Proportional Distribution of Allergenic Pollen Taxa
- Pollen Calendars
- Year-To-Year Variability in Start Date of The Main Pollen Season
3.1.1 Pollen sampling characteristics
Of the 51 stations received from the NAB, 31 stations met inclusion criteria (Fig. 1, Table 1).
3.1.2 Important allergenic pollen taxa
We elected to focus on eleven important allergenic pollen taxa in the CUSSC region as determined by their abundance in CUSSC (Table 2) and guided by previous studies (Lewis et al. 1983; Park et al. 2014; de Weger et al. 2013; Emberlin 2009). In the past, Pinaceae pollen has been considered a mild allergen and disregarded as an important allergenic pollen. Recent studies suggest that rates of allergic reactivity to Pinaceae pollen are on the rise (Park et al. 2014) and that the abundance of Pi...
3.1.3 Reliability of main pollen season start date calculation
Our choice of start date metrics balances sensitivity to relatively low pollen concentrations, an important consideration from a health standpoint, with robustness to missing values, a significant consideration with this pollen dataset. As explained in “Methods,” our start date is defined based on an integral of pollen concentrations that begin on the first day of the pollen year (usually January 1) and days with missing data do not contribute. Unfortunately, it is not uncommon to have measur...
The number of dominant pollen taxa varies among stations. For all stations in the CUSSC region, 70% of the APIn at a location is comprised of eight or fewer pollen taxa (Fig. 3). Relative abundances of the important allergenic taxa show that Quercus and Cupressaceae are the most abundant pollen taxa in the CUSSC (Table 2, stacked bar chart and rada...
The airborne pollen season varies in time and space depending on the pollen taxon. We selected four methods for describing the main pollen season to present both the location perspective and the taxon perspective. We first present two types of pollen calendars. The first calendar type describes the long-term mean of all observed allergenic pollen t...
There is considerable interannual variability in main pollen season start dates. Figure 2 illustrates that start dates for six of the seven taxa from London, Ontario, can be assessed with reasonable reliability (see Sect. 3.3 for a discussion of the influence of first sampling date on the calculation of main pollen season start date). For these six...
- Fiona Lo, Cecilia M. Bitz, David S. Battisti, Jeremy J. Hess
- 2019
Jul 8, 2014 · Rocky Mountain spotted fever is a tickborne disease first recognized in 1896 in the Snake River Valley of Idaho. It was originally called “black measles” because of the look of its rash in the late stages of the illness, when the skin turns black. It was a dreaded, often fatal disease, affecting hundreds of people in Idaho.
Nov 2, 2020 · Proportion of fatal and nonfatal cases of Rocky Mountain spotted fever in Sonora, Mexico, 2015-2018, among all cases (Map A) and persons aged < 18 years (Map B). findings: Cases of...
