Recent sampling and analyses have confirmed elevated levels of heavy metals/metalloids, with higher concentrations occurring during periods of low rainfall.
For some patients 2 samples were used, this less recent sample and another sample collected about 1 year later.
In contrast, 21/28 (75%) of samples which failed to amplify were <40 cp/ml, 2 had become undetectable in the most recent sample and 19 had been undetectable for a median of 577 days (range: 32 2481 days).
Exposure estimates are based on recent sampling and historical samples of CO as well as on estimates of CO based on diesel engine horsepower and mine ventilation rates (Coble et al., 2010; Stewart et al., 2010; Vermeulen et al., 2010a, b; Borak et al., 2011; Stewart et al., 2012).
Patients aged ≥ 18 years with baseline estimation of glomerular filtration rate (eGFR) < 60 mL/min, as measured in their most recent sample and at least two measurements for ≥ three months prior to the beginning of the protocol, were included in the study.
The differences in morphology between the historical and recent samples ('crusted' and aggregated in the former) probably reflect the differences in particle size, with the historical samples being substantially finer, hence promoting electrostatic aggregation of very fine particles onto larger ones (see Brown et al. 2012, and references therein).
Overall the sensitivity of HIV-1 pol PCR FP-DBS assay on all FP-DBS samples (archived and recent samples) was 98.3% and specificity of 98.9%.
We omitted the RIB and VAR populations from the analyses, as they are assumed to represent introduced populations, and we used the most recent samples from the VID and RIN populations (VID02 and RIN04).
The major PCB congener in human milk (CB-153) exceeds the most abundant PBDE congener (BDE-153) by a factor of 150 in the most recent samples (Tables 1 and 2).
