| pathological and physiological changes in the south african freshwater crab potamonautes warreni calman induced by microbial gill infestations. | the impact of microbial gill infestations on the pathology and physiology of the freshwater crab potamonautes warreni was investigated by comparison of infested and uninfested crab populations from, respectively, a polluted and an unpolluted site along the mooi river, north west province, south africa. heavy gill infestations by bacteria (70%), peritrichous ciliates such as lagenophrys sp. (15%), zoothamnium sp. (10%), and epistylis sp. (5%), and motile protozoans resulted in species-specific le ... | 2001 | 11437530 |