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Journal of Veterinary Medicine
Volume 2014 (2014), Article ID 147652, 5 pages
Research Article

Acute Phase Response and Neutrophils : Lymphocyte Ratio in Response to Astaxanthin in Staphylococcal Mice Mastitis Model

Division of Medicine, Indian Veterinary Research Institute, Izatnagar, Uttar Pradesh 243122, India

Received 12 June 2014; Revised 29 September 2014; Accepted 3 November 2014; Published 19 November 2014

Academic Editor: Fulvio Riondato

Copyright © 2014 Tshering Dolma et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The purpose of the study was to determine the immunotherapeutic effect of astaxanthin (AX) on total clinical score (TCS), C-reactive protein (CRP), and neutrophil : lymphocyte ratio in mice mastitis model challenged with pathogenic Staphylococcus aureus. Twenty-four lactating mice were divided in 4 equal groups: group I mice served as normal healthy control, group II, positive control, were challenged with pathogenic S. aureus, group III mice were challenged and treated with AX, and group IV were treated with amoxicillin plus sulbactum. The TCS was higher in postchallenged mice; however it was significantly higher in group II untreated mice as compared to group III and group IV mice. The neutrophil was higher and lymphocyte count was lower in group II mice at 120 hrs post challenge (PC). The CRP was positive in all the challenged group at 24 hrs PC, but it remained positive till 120 hrs PC in group II. The parameters are related to enhancement of the mammary defense and reduction of inflammation. Hence AX may be used alone or as an adjunct therapy with antibiotic for amelioration of mastitis. Development of such therapy may be useful to reduce the antibiotic burden in management of intramammary infection.