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lunes, 27 de febrero de 2017

Guía NOM-010-STPS-2014, Agentes químicos contaminantes del ambiente laboral

La Secretaría del Trabajo y Previsión Social, en ejercicio de sus atribuciones de normalización, publicó en el Diario Oficial de la Federación de fecha 28 de abril de 2014, la Norma Oficial Mexicana NOM-010-STPS-2014, Agentes químicos contaminantes del ambiente laboral - Reconocimiento, evaluación y control, misma que tiene por objeto establecer los procesos y las medidas para la prevención de riesgos a la salud del personal ocupacionalmente expuesto a agentes químicos contaminantes del ambiente laboral.
Dicha Norma rige en todo el territorio nacional y aplica a todos los centros de trabajo donde existan agentes químicos contaminantes del ambiente laboral, es decir, sustancias o mezclas capaces de modificar las condiciones ambientales del centro de trabajo y que, por sus propiedades, concentración, nivel y tiempo de exposición o acción, pueden alterar la salud de los trabajadores.

REFERENCIAS:

  1. Guía Informativa de la Norma Oficial MexicanaNOM-010-STPS-2014, Agentes químicoscontaminantes del ambiente laboral -Reconocimiento, evaluación y control
  2. NORMA Oficial Mexicana NOM-010-STPS-2014, Agentes químicos contaminantes del ambiente laboral-Reconocimiento, evaluación y control.
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lunes, 20 de febrero de 2017

Control strategies against Campylobacter at the poultry production level

Campylobacteriosis is the most prevalent bacterial foodborne gastroenteritis affecting humans in the European Union, and ranks second in the United States only behind salmonellosis. In Europe, there are about nine million cases of campylobacteriosis every year, making the disease a major public health issue. Human cases are mainly caused by the zoonotic pathogen Campylobacter jejuni. The main source of contamination is handling or consumption of poultry meat. Poultry constitutes the main reservoir of Campylobacter, substantial quantities of which are found in the intestines following rapid, intense colonization. Reducing Campylobacter levels in the poultry chain would decrease the incidence of human campylobacteriosis. As primary production is a crucial step in Campylobacter poultry contamination, controlling the infection at this level could impact the following links along the food chain (slaughter, retail and consumption). This review describes the control strategies implemented during the past few decades in primary poultry production, including the most recent studies. In fact, the implementation of biosecurity and hygiene measures is described, as well as the immune strategy with passive immunization and vaccination trials and the nutritional strategy with the administration of organic and fatty acids, essential oil and plant-derived compound, probiotics, bacteriocins and bacteriophages.

REFERENCIA:
Meunier M, et al. Control strategies against Campylobacter at the poultry production level: biosecurity measures, feed additives and vaccination. J Appl Microbiol. 2016 May;120(5):1139-73.
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jueves, 16 de febrero de 2017

Permeation of limonene through disposable nitrile gloves

OBJECTIVES: The purpose of this study was to investigate the permeation of the low-volatile solvent limonene through different disposable, unlined, unsupported, nitrile exam whole gloves (blue, purple, sterling, and lavender, from Kimberly-Clark).
METHODS: This study utilized a moving and static dextrous robot hand as part of a novel dynamic permeation system that allowed sampling at specific times. Quantitation of limonene in samples was based on capillary gas chromatography-mass spectrometry and the internal standard method (4-bromophenol).
RESULTS: The average post-permeation thicknesses (before reconditioning) for all gloves for both the moving and static hand were more than 10% of the pre-permeation ones (P ≤ 0.05), although this was not so on reconditioning. The standardized breakthrough times and steady-state permeation periods were similar for the blue, purple, and sterling gloves. Both methods had similar sensitivity. The lavender glove showed a higher permeation rate (0.490 ± 0.031 μg/cm2/min) for the moving robotic hand compared to the non-moving hand (P ≤ 0.05), this being ascribed to a thickness threshold.
CONCLUSIONS: Permeation parameters for the static and dynamic robot hand models indicate that both methods have similar sensitivity in detecting the analyte during permeation and the blue, purple, and sterling gloves behave similarly during the permeation process whether moving or non-moving.

REFERENCE:
Banaee S, Que Hee SS. PERMEATION OF LIMONENE THROUGH DISPOSABLE NITRILE GLOVES USING A DEXTROUS ROBOT HAND. J Occup Health. 2017 Jan 21.

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lunes, 13 de febrero de 2017

EBSA upcoming events on #Biosafety

22 MAR 2017
7th “Annual International Symposium on Biosafety and Biosecurity: Future Trends and Solutions”
Milán, Italy.
When: 22 March 2017 - 13:00 to 24 March 2017 - 14:00

25 APR 2017
20th Annual meeting - EBSA conference
Madrid, Spain
When: 25 April 2017 - 09:00 to 28 April 2017 - 17:00

12 JUN 2017
IVBW18- International Veterinary Biosafety Workgroup
When: 12 June 2017 - 10:00 to 15 June 2017
Brazil.

24 AUG 2017
SBNet - 11th Applied Biosafety Meeting
When: 24 August 2017 - 13:00 to 25 August 2017 - 17:00
Basel, Switzerland,

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martes, 7 de febrero de 2017

Aerosol Generation During Bone-Sawing Procedures in Veterinary Autopsies

elpais.com; NatGeo
Bone-sawing procedures are routinely performed during veterinary and human autopsies and represent an important source for infectious aerosols. Here we investigate the generation of aerosols during bone-sawing procedures using 5 different saws regularly used in veterinary and human pathology. In particular, the electrical bone band saw produced vast amounts of aerosolized particles less than 5 µm in diameter, which spread rapidly throughout the entire autopsy hall, leading to an exposure of all personnel. Other sawing devices tested were a diamond-coated cut grinder, an oscillating saw, a reciprocating saw, and a hand bone saw. Although these saws, especially the handsaw, generated fewer aerosolized particles than the band saw, the level of exposure of the saw operator would still be of concern in cases where infectious material would require sawing. Contamination of the entire autopsy area was successfully prevented by the construction of a separately ventilated sawing cabin inside the existing autopsy room. Saw operators in this cabin, however, were exposed to even higher aerosol concentrations. Protection of saw operators was achieved by using a powered air-purifying respirator. In conclusion, our results demonstrate that all bone-sawing procedures applied in veterinary and human pathology can generate aerosols that are of concern for the health of autopsy personnel. To reduce the risk of aerosol infections from bone-sawing procedures, efficient and properly designed ventilation systems to limit the spread of aerosols and appropriate personal protective equipment against aerosols for exposed personnel should be implemented.

REFERENCES:
Wenner L, et al. Aerosol Generation During Bone-Sawing Procedures in Veterinary Autopsies. Vet Pathol. 2017 Jan 1:300985816688744. doi: 10.1177/0300985816688744.

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