Abstract
In a random screening of camel diseases in Somalia dust-laden macrophages in lungs and/or bronchial lymph nodes were discovered in 94 of 134 animals. In 44 cases the dust-laden macrophages occurred in a number of small or large aggregates. There was a significant positive correlation between dust-laden macrophage aggregates in the lungs and pulmonary fibrosis not related to other chronic lung diseases, such as echinococcosis and chronic pneumonia. Six cases showed a cellular reaction and hyalinized nodules of the classic silicotic type. Energy dispersive X-ray analysis of the dust particles revealed presence of silica, aluminium, potassium and iron in that order. The possible clinical significance as well as the comparative pathology of the observations is discussed.
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