Abstract
The salivary glands of adult female cockroaches were subjected to duct ligation, unilateral duct ligation, or duct lesion and examined histologically at various times thereafter. Types of effects include (1) dissolution of acini, (2) acinar atrophy, (3) modified acinar atrophy with and without vesicle formation, and (4) haemocytic encapsulation and vesicle formation. Types 3 and 4 involve a proliferation of intercalated cells to form giant cells, which eventually yield the vesicular epithelium. Tumour incidence in acini is greatest after ligation; after duct lesion incidence is highest in the reservoirs. Experimental methods and tumours induced cause increased mortalities.
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