{'fraction_non_alphanumeric': 0.014479638009049774, 'fraction_numerical': 0.008144796380090498, 'mean_word_length': 5.583333333333333, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Recovery of the bursa of Fabricius in chickens after cyclophosphamide treatment: a histological study.

Chickens were injected posthatching with cyclophosphamide in three different doses (total 8, 10, 11 mg). Histomorphological analysis of bursal tissue was performed up to 11 weeks of age. A probable biphasic recovery was observed in the majority of the chickens. The first phase of recovery is characterized by the appearance of solitary thioninophilic cells in reticuloepithelial follicles, followed in a few follicles by a redevelopment similar to embryonal follicular genesis. The late phase of recovery starts from week 7 on by infiltration of reticuloepithelial follicles with mature plasma cells in the manner of a peripheral lymphoid organ followed by thioninophilic lymphoid cells. The latter cells populate the follicles successively. Different transitions to normal follicles then take place. These investigations confirm observations of a reconstitution of bursal compartments starting some weeks later than the recovery of thymus, which takes place 2 weeks after cyclophosphamide treatment.