The enteric pathogen Campylobacter can be carried into poultry processing facilities on and within live birds. Numbers of Campylobacter recovered from carcasses decrease after scalding but increase during feather removal. Mechanical feather picking causes mist as well as particles of dust, feathers, feces, and other matter to become airborne around the machine. This study was conducted to deter...

There has been an increasing interest in the effects of volcanic eruption on the environment, climate, and health following two recent volcanic eruptions in Iceland. Although health issues are mainly focused on subjects living close to the eruption due to the high concentration of airborne ash and gasses in close vicinity to the volcanoes, the ash may also reach high altitude and get distribute...

K.R. SPURNY: "Physical and chemical characterization of individual airborne particles", 1986, pages 101-115, Ellis Horwood Ltd, GB; J. ALLEN: "Size and shape measurement of individual aerosol particles by asymmetric laser light scattering" Proprietor: The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland Whitehall Lo...

Influenza is thought to be communicated from person to person by multiple pathways. However, the relative importance of different routes of influenza transmission is unclear. To better understand the potential for the airborne spread of influenza, we measured the amount and size of aerosol particles containing influenza virus that were produced by coughing. Subjects were recruited from patients...

This article is the first part of a review of investigations carried out until about 1990 into the role of mechanical ventilation in reducing wound sepsis in hospitals. It deals with the design of mechanical ventilation systems to reduce airborne microbe-carrying particles (MCPs), and mainly discusses unidirectional airflow (UDAF) systems. The second part will deal with the effect of mechanical...

Miniaturized detection systems for nanometer-sized airborne particles are in demand, as in applications for onboard diagnostics downstream particulate filters in modern diesel engines. A soot sensor based on resistivity measurements was developed and characterized. This involved generation of soot particles with properties similar to diesel engines using a quenched co-flow diffusion flame; depo...

Airborne measurements in the Arctic in spring show large increases in the concentrations of particles with diameters below about 0.1 mm just above the tops of stratus clouds when the water-vapor mixing ratio is relatively high in these regions. Low temperatures and low particle surface areas may also favor the appearance of these particles. Particles produced above stratus clouds could be a wid...

Outdoor allergens are an important part of the exposures that lead to allergic disease. Understanding the role of outdoor allergens requires a knowledge of the nature of outdoor allergen-bearing particles, the distributions of their source, and the nature of the aerosols (particle types, sizes, dynamics of concentrations). Primary sources for outdoor allergens include vascular plants (pollen, f...

We have designed, constructed, and tested a system that pre-selects the biological fraction of airborne particles from the overall aerosol. The preselection is based on fluorescence emission excited by a continuous 266 nm laser beam. This beam is one of two cw beams used to measure the aerodynamic particle size of sampled particles. The intention in our system is that single particles, based on...