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Research Article

Effects of Jin-Ying-Tang on Staphylococcus aureus-induced mastitis in rabbit

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Pages 786-793 | Received 05 Nov 2011, Accepted 04 Jan 2012, Published online: 04 Feb 2012
 

Abstract

The present study was performed to investigate the effects of Jin-Ying-Tang (JYT), a Chinese herbal formula containing Lonicera japonica, Herba taraxaci, Fructus trichosanthis, Fructus forsythia, Radix et rhizoma rhei, Astragalus membranaceus, Angelica sinensis, on rabbit mastitis induced by Staphylococcus aureus. Suckling rabbits were challenged with 1.5 × 107 colony forming unit (CFU) of S. aureus at the base of the third pair teats, and they were treated and pretreated with JYT to detect the formula effects. The results showed that JYT could reduce the occurrence of Staphylococcal mastitis in rabbit model. To further investigate the action mechanism of JYT, we examined the leukocyte counts and inflammatory mediator levels such as TNF-α and IL-6 in blood and infected tissue. From histological study and blood analysis, we found that JYT could suppress leukocyte infiltration in infected mammary gland tissue and significantly inhibit the total leukocyte counts and lymphocytes (LYM), monocytes (MON) and granulocytes (GRA) fractions of leukocyte counts in blood. Enzyme-linked immunosorbent assay (ELISA) results showed JYT significantly decreased the TNF-α and IL-6 concentrations in serum and mammary gland. The analysis of these data suggested that JYT effectively inhibited inflammatory responses to reduce the occurrence of mastitis in rabbit model.

Acknowledgments

This study was supported by the Agricultural Science and Technology Projects of Guizhou Province (No. 3048), the National Natural Science Foundation of China (No.31060347).

Declaration of interest

The authors declare no conflicts of interest.

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