Hazardous materials: revision to standards for infectious substances. Final rule.
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RSPA is revising transportation requirements for infectious substances, including regulated medical waste, to: adopt defining criteria and packaging requirements consistent with international standards; revise the current broad exceptions for diagnostic specimens and biological products; and authorize bulk packaging options for regulated medical waste consistent with requirements in international standards and DOT exemptions. These revisions will assure an acceptable level of safety for the transportation of infectious substances, and facilitate domestic and international transportation. (+info)
Phthalates in underground waters of the Zagreb area.
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AIM: To determine whether and in what concentrations the underground waters, stream waters, spring water, and tap water from the Zagreb area contain phthalates -- compounds used as plastic softeners, which have recently been ascribed carcinogenic, mutagenic, and teratogenic effects. METHOD: The presence of dimethyl phthalate (DMP), diethyl phthalate (DEP), dibutyl phthalate (DBP), benzylbutyl phthalate (BBP), diethylhexyl phthalate (DEHP), and dioctyl phthalate (DOP) was determined in a total of 96 samples of underground waters, stream waters, and tap water from the Zagreb area between February and June 1998. Identification and quantification of phthalates were performed by the method of gas chromatography (GC-ECD), with a detection limit of 0.005 microg/L. RESULTS: The presence of one or more phthalates was demonstrated in 93 out of 96 (97%) water samples. The measured values ranged from 0.005 to 18.157 microg/L. Phthalates were detected in 76 out of 77 (98%) underground water samples. The mean level of all phthalates present in the water samples was 4.879 microg/L. Median test yielded a significantly increased level of phthalates in the underground waters from Jakusevac (sampled in February 1998) and Trebe , which are Zagreb and Samobor city waste dumps, as compared with other sites in the study (overall median=3.785; chi-square=22.682; p<0.001). Phthalates were found at a mean concentration of 3.363 microg/L in all 10 water samples from the Sava river, the major source of the Zagreb alluvium underground waters. In case of drinking water, phthalates were detected in 7 out of 9 (78%) samples, at a mean concentration of 0.887 microg/L. As expected, DEHP was the most commonly detected phthalate, found in 78 (81%) water samples. CONCLUSION: The highest phthalate concentrations were recorded in underground waters directly related to the proximity of a waste dump. The levels of phthalates recorded in this study were lower than those reported from other countries and did not present a threat to human health. Environmental phthalate monitoring should be continued and their maximum allowed concentrations should be prescribed by regulations. (+info)
Fibrous material in feedlot waste fermented by Trichoderma viride.
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Trichoderma viride QM9123 fermented fiber isolated from feedlot waste at concentrations up to 16.7% solids. The fermented fiber solids decreased by 32%, and carbohydrate decreased by 60%. Cellulotyic enzyme production was better with fiber substrates that had been alkali pretreated and had a lower hemicellulose-to-cellulose ratio. (+info)
An intervention for the promotion of hygienic feces disposal behaviors in a shanty town of Lima, Peru.
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This paper describes the design, implementation and evaluation of an intervention to promote improved hygiene practices in a shanty town area of Lima, Peru. Following formative research, the intervention focused on behaviors associated with the hygienic use of potties by children aged 15-47 months and keeping the home environment free from feces. A health communications strategy was developed involving delivery through routine health services, and using video presentations, leaflets and counseling by health staff during consultations. Intervention activities occurred during a 6-month period in health centers and posts of four intervention communities; four other communities acted as a comparison group. Process and impact indicators were measured through questionnaires and 4-h structured observations conducted in over 600 households both pre- and post-intervention implementation, and through intervention monitoring activities. The intervention materials and approach were well received by the study community; however, in the time-frame of the project only limited coverage of the target audience was achieved, which was insufficient to result in an impact on behaviors. Nevertheless sufficient positive features existed to suggest that with higher coverage, an impact on target behaviors might have been achieved. Reasons for the intervention's shortcomings are discussed and suggestions made for more effective implementation. (+info)
Compost-induced suppression of Pythium damping-off is mediated by fatty-acid-metabolizing seed-colonizing microbial communities.
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Leaf composts were studied for their suppressive effects on Pythium ultimum sporangium germination, cottonseed colonization, and the severity of Pythium damping-off of cotton. A focus of the work was to assess the role of fatty-acid-metabolizing microbial communities in disease suppression. Suppressiveness was expressed within the first few hours of seed germination as revealed by reduced P. ultimum sporangium germination, reduced seed colonization, and reduced damping-off in transplant experiments. These reductions were not observed when cottonseeds were sown in a conducive leaf compost. Microbial consortia recovered from the surface of cottonseeds during the first few hours of germination in suppressive compost (suppressive consortia) induced significant levels of damping-off suppression, whereas no suppression was induced by microbial consortia recovered from cottonseeds germinated in conducive compost (conducive consortia). Suppressive consortia rapidly metabolized linoleic acid, whereas conducive consortia did not. Furthermore, populations of fatty-acid-metabolizing bacteria and actinobacteria were higher in suppressive consortia than in conducive consortia. Individual bacterial isolates varied in their ability to metabolize linoleic acid and protect seedlings from damping-off. Results indicate that communities of compost-inhabiting microorganisms colonizing cottonseeds within the first few hours after sowing in a Pythium-suppressive compost play a major role in the suppression of P. ultimum sporangium germination, seed colonization, and damping-off. Results further indicate that fatty acid metabolism by these seed-colonizing bacterial consortia can explain the Pythium suppression observed. (+info)
The upper airway response to pollen is enhanced by exposure to combustion particulates: a pilot human experimental challenge study.
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Although human experimental studies have shown that gaseous pollutants enhance the inflammatory response to allergens, human data on whether combustion particulates enhance the inflammatory response to allergen are limited. Therefore, we conducted a human experimental study to investigate whether combustion particulates enhance the inflammatory response to aeroallergens. "Enhancement" refers to a greater-than-additive response when combustion particulates are delivered with allergen, compared with the responses when particulates and allergen are delivered alone. Eight subjects, five atopic and three nonatopic, participated in three randomized exposure-challenge sessions at least 2 weeks apart (i.e., clean air followed by allergen, particles followed by no allergen, or particles followed by allergen). Each session consisted of nasal exposure to combustion particles (target concentration of 1.0 mg/m3) or clean air for 1 hr, followed 3 hr later by challenge with whole pollen grains or placebo. Nasal lavage was performed immediately before particle or clean air exposure, immediately after exposure, and 4, 18 and 42 hr after pollen challenge. Cell counts, differentials, and measurement of cytokines were performed on each nasal lavage. In atopic but not in nonatopic subjects, when allergen was preceded by particulates, there was a significant enhancement immediately after pollen challenge in nasal lavage leukocytes and neutrophils (29.7 X 10(3) cells/mL and 25.4 X 10(3) cells/mL, respectively). This represents a 143% and 130% enhancement, respectively. The enhanced response for interleukin-4 was 3.23 pg/mL (p = 0.06), a 395% enhancement. In atopic subjects there was evidence of an enhanced response when particulates, as compared to clean air, preceded the allergen challenge. (+info)
Cradle-to-cradle stewardship of drugs for minimizing their environmental disposition while promoting human health. II. Drug disposal, waste reduction, and future directions.
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Since the 1980s, the occurrence of pharmaceuticals and personal care products (PPCPs) as trace environmental pollutants, originating primarily from consumer use and actions rather than manufacturer effluents, continues to become more firmly established. The growing, worldwide importance of freshwater resources underscores the need for ensuring that any aggregate or cumulative impacts on (or from) water supplies are minimized. Despite a paucity of effects data from long-term, simultaneous exposure at low doses to multiple xenobiotics (particularly non-target-organism exposure to PPCPs), a wide range of proactive actions could be implemented for reducing or minimizing the introduction of PPCPs to the environment. Most of these actions fall under what could be envisioned as a holistic stewardship program--overseen by the health care industry and consumers alike. Significantly, such a stewardship program would benefit not just the environment--additional, collateral benefits could automatically accrue, including the lessening of medication expense for the consumer and improving patient health and consumer safety. In this article (the second of two parts describing the "green pharmacy") I focus on those actions and activities tied more closely to the end user (e.g., the patient) and issues associated with drug disposal/recycling that could prove useful in minimizing the environmental disposition of PPCPs. I also outline some recommendations and suggestions for further research and pose some considerations regarding the future. In this mini-monograph I attempt to capture cohesively for the first time the wide spectrum of actions available for minimizing the release of PPCPs to the environment. A major objective is to generate an active dialog or debate across the many disciplines that must become actively involved to design and implement a successful approach to life-cycle stewardship of PPCPs. (+info)
Airway inflammation in waste handlers exposed to bioaerosols assessed by induced sputum.
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Work-associated lower airway inflammation in waste collectors was examined by induced sputum and correlated with the bioaerosol exposure. Organic waste collectors (n=25) underwent induced sputum collection and spirometry before work on Monday and the following Thursday. Total cells, cell differentials, interleukin (IL)-8 and eosinophilic cationic protein were determined. Personal full-shift exposure measurements were performed Monday, Tuesday and Wednesday and analysed for total bacteria, fungal spores, endotoxins and beta(1-3)-glucans. The percentage of neutrophils (46-58%) and the IL-8 concentration (1.1-1.4 ng x mL(-1)) increased from Monday to Thursday. Forced expiratory volume in one second (FEV1) was significantly reduced on Thursday, and the decrease in FEV1/forced vital capacity correlated with the increase in the percentage of neutrophils. The median exposure to endotoxin (range 7-180 EU x m(-3)) and beta(1-3)-glucan (range 5-220 ng x m(-3)) was correlated with the increase in IL-8. Bioaerosol exposure during waste collection induced an inflammatory response in the lower airways, characterised by neutrophils and interleukin-8 secretion, that influenced the lung function. The inflammatory response was related to microbial components in the bioaerosol and was more pronounced for endotoxin than beta(1-3)-glucan exposure. No associations were found for mould spores or bacteria. (+info)