427 COVER Human cells infected with the protozoan parasite Toxoplasma gondii visualized by scanning electron microscopy. In the foreground are parasites (yellow-green) rupturing out of a dying host cell (blue); in the background is an intact host cell containing a large parasite-filled vacuole. See page 530.

Because enforcement of forestry law has become extremely difficult in Indonesia, a ban on export of logs has been suggested as a means of controlling over-harvest and illegal logging. A model of a log export ban can help us visualize its effects on the forestry sector. The model consists of simplified overviews of: the wood processing sector, demand – price feed back loops, forest standing stoc...

INTRODUCTION There are increasing concerns over the presence and implications of pharmaceutical agents in water. In 2002, California banned pharmaceutical use of lindane because of concerns about water quality, as lindane treatment for head lice and scabies was found to be a significant factor adversely affecting wastewater quality. OBJECTIVES In this article we describe the effects the ban h...

BACKGROUND This is the first study to have examined the effect of smoking bans on hospitalizations in the Atlantic Canadian socio-economic, cultural and climatic context. On June 1, 2003 Prince Edward Island (PEI) enacted a province-wide smoking ban in public places and workplaces. Changes in hospital admission rates for cardiovascular (acute myocardial infarction, angina, and stroke) and respi...

Informal health providers ranging from drug vendors to traditional healers account for a large fraction of health care provision in developing countries. They are, however, largely unlicensed and unregulated leading to concern that they provide ineffective and, in some cases, even harmful care. A new and controversial policy tool that has been proposed to alter household health seeking behavior...

OBJECTIVES To describe the issues encountered during the implementation of an indoor smoking ban in prison and its effects on self-reported tobacco use, perceived exposure to second-hand smoke (SHS) and perceived health status of inmates in Quebec's provincial correctional facilities. METHODS Quantitative data were obtained from 113 inmates in three provincial correctional facilities in the p...