Olive pollens are one of the main factors causes of allergies affecting the population in industrialized countries.

We studied prevalence of olive pollen allergy and the relationship between olive pollen allergy and the existence or development of other diseases in Beni Mellal (BM) city. We conducted a cross–sectional study using a questionnaire among subjects allergy in a sample size of 400 subjects, chosen randomly from BM.

Our epidemiologic studies revealed a crucial role of olive pollen in increasing of prevalence of allergic disorders. Furthermore our results show dependence between asthma and cardiovascular diseases in people allergic to olive pollen suggesting that asthmatic people who are allergic to olive pollen are the most susceptible to develop cardiovascular disease. These findings should be explored by clinical research in the future that can help in understanding the mechanisms associated with the asthma and cardiovascular disease in people allergic to olive pollen.