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Mammary gland changes in sows with relapsing MMA
MMA (Mastitis Metritis Agalactia) is a common problem in sows, and unfortunately animals which have once suffered from this syndrom tend to relapses after the next pregnancy. What happens within the mammary glands of these animals? A very interesting, recently published study from Switzerland.

In a large pig breeding herd with high prevalence of post-parturient diseases of the sows, weaned sows of different parity groups with (n = 663) or without (n = 1125) recidiving mastitis metritis agalactia (MMA) in their previous history were subjected to ultrasonography.

A total of 114 of 663 sows with recidiving MMA in their previous history and with ultrasonographic visible mammary gland changes, and 157 of sows without recidiving MMA in their previous history were culled and subjected to gross pathological and bacteriological examination of their mammary glands.

The sows having suffered MMA had more (p < 0.001) hyperechogenic images in their mammary glands compared with the sow having suffered no recidiving MMA.

Abdominal glands were more (p < 0.01) prone to pathological changes compared with the pectoral ones.

Sows of high parity had more hyperechogenic images and gross pathological changes in their mammary glands compared with the sows of low parity.


Source: Baer, C & Bilkei, G (2005): Ultrasonographic and Gross Pathological Findings in the Mammary Glands of Weaned Sows Having Suffered Recidiving Mastitis Metritis Agalactia. In: Reproduction in Domestic Animals 40 (6), 544-547.





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SWINE PRACTICE

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