Ultrasonographic evaluation of the supramammary lymph nodes and udder’s tissue in Saanen goat and its relation with subclinical mastitis

Document Type : Full paper (Original article)

Authors

1 Graduated from Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, Iran

2 Department of Clinical Sciences, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, Iran

3 Department of Animal Sciences, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran

Abstract

Background: Precise and on-time diagnosis of the udder’s diseases is important, because of their economic importance. Udder structures like teat, parenchyma, and supramammary lymph nodes can be evaluated by ultrasonography. Aims: The study aimed to evaluate the ultrasonographic technique for imaging the supramammary lymph nodes and udder’s tissue in Saanen goats and the relation between the findings of ultrasonography and subclinical mastitis. Methods: Thirty milking Saanen goats were evaluated in the study. Milk sampling from each teat was performed under standard conditions for bacteriological culture and somatic cell count (SCC). A 7.5 MHz linear transducer was used for the ultrasonography of teats with the water bath technique, and supramammary lymph nodes and udder’s tissues were imaged using a 10 MHz linear transducer with direct contact. The length, height, area, and echogenicity of each lymph node and the teat canal wall diameter were measured using ImageJ 1.47v on the ultrasonography scanned images and analyzed by SPSS software. Results: There was no significant relationship between the dimension of the supramammary lymph nodes and SCC or culture. Age had a positive relationship with lymph node size. No significant relationship was seen between the size of the supramammary lymph node before and after the treatment. Supramammary lymph nodes’ echogenicity of the quarter with subclinical mastitis and healthy ones represented no significant difference before and after the treatment. Conclusion: Ultrasonography of the udder, teat, mammary gland, and supramammary lymph nodes is a safe and non-invasive method for visualizing separate structures. The positive relationship between SCC and milk echogenicity as well as supramammary lymph nodes dimension, and age was described.

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References

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