Anderson M L, Moore P F, Hyde D M, Dungworth D L
Res Vet Sci. 1986 Sep;41(2):211-20.
The occurrence and morphological features of bronchus associated lymphoid tissue (BALT) were examined by light and electron microscopy in the non-pneumonic left lungs of five age groups of cattle from neonate to aged adult. The amount of BALT was correlated with age. It was absent in neonatal lungs and increased progressively with age until it declined in aged adult cattle. Within age groups the occurrence and morphology of BALT was variable. Widely scattered lymphoid aggregates were the predominant morphological type of BALT in the bovine lung. Follicular development in BALT foci was less frequent and quite variable within individual lungs. Morphologically distinct lymphoepithelium overlying BALT foci could not be demonstrated in non-pneumonic bovine lungs.
运用光镜和电镜检查了从新生牛至成年老龄牛五个年龄组非肺炎性左肺中支气管相关淋巴组织（BALT）的发生情况及形态特征。BALT的数量与年龄相关。新生牛肺中不存在BALT，其数量随年龄增长逐渐增加，直至成年老龄牛时减少。在各年龄组内，BALT的发生情况和形态存在差异。广泛散在的淋巴集结是牛肺中BALT的主要形态类型。BALT病灶内的滤泡发育较少见，且在单个肺内变化很大。在非肺炎性牛肺中无法证实覆盖BALT病灶的形态学上明显的淋巴上皮。
