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  • Title: Specific antibody-containing cells in the mammary gland of non-lactating sheep after intraperitoneal and intramammary immunisation.
    Author: Sheldrake RF, Husband AJ, Watson DL.
    Journal: Res Vet Sci; 1985 May; 38(3):312-6. PubMed ID: 3925509.
    Abstract:
    Ewes were immunised intraperitoneally with ovalbumin and Brucella abortus in Freund's complete adjuvant, followed seven days later by intramammary immunisation in which ovalbumin was presented to one mammary gland and Brucella abortus to the other. Mammary tissue taken after a further seven days contained more antigen-specific plasma cells than ewes given intraperitoneal or intramammary immunisation alone. These cells were found predominantly in the specifically immunised gland and only a few were found in the contralateral gland. Most of these cells were of the IgG1 isotype. There was also an increase in the total number of IgG1- and IgG2-containing cells in mammary gland tissues of these ewes, indicating a non-specific response to immunisation. Following either intraperitoneal or intramammary immunisation there was also a significant increase in the number of antigen-specific IgA cells in the lamina propria of the jejunum. The gut response following intramammary immunisation alone was abrogated by chronic drainage of intestinal lymph but not mammary lymph. This suggests that antigen may relocate from the mammary gland to the intestine where an IgA response is generated from gut associated lymphoid tissue. These data provide evidence for interaction between the gut and mammary gland of sheep in response to antigen.
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