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Asthma is one of the most common chronic diseases in the world. It is estimated that around 300 million people in the world currently have asthma [1]. Asthma has become more common in both children and adults around the world in recent decades. The increase in the prevalence of this disease has been associated with an increase in atopic sensitization, and is paralleled by similar increases in other allergic disorders such as eczema and rhinitis [1]. The rate of asthma increases as communities adopt western lifestyles and become urbanized. With the projected increase in the proportion of the world's population that is urban from 45% to 59% in 2025, there is likely to be a marked increase in the number of asthmatics worldwide over the next two decades [2]. Nevertheless the prevalence of asthma in rural developing countries has been under estimated for many years [3]. In many areas of the world persons with asthma do not have access to basic asthma medications or medical care and are not included in any statistical survey [4]. Increasing the economic wealth and improving the distribution of re‐ sources between and within countries represent important priorities to enable better health care to be provided. The burden of asthma in many countries is of sufficient magnitude to warrant its recognition as a priority disorder in government health strategies. Particular re‐ sources need to be provided to improve the care of disadvantaged groups with high morbidity. Resources also need to be provided to address preventable factors [1, 2]. It is estimated that asthma accounts for about 1 in every 250 deaths worldwide. Many of the deaths are prevent‐ able, being due to suboptimal long-term medical care and delay in obtaining help during the final attack. The economic cost of asthma is considerable both in terms of direct medical costs (such as hospital admissions and cost of pharmaceuticals) and indirect medical costs (such as time lost from work and premature death) [1]. Therefore there is a greater understanding of

Helminthic Infections and Asthma: Still a Challenge for Developing Countries