ROLE OF MILK TRI-IODOTHIRONIN (T3) AND SOME BIOCHEMICAL PARAMETERS ON UDDER STATUS IN DAIRY BUFFALOES

Nabih A.m ,Ghada H.a El Rahman

doi:10.21608/avmj.2015.170039

Nabih A.m , Ghada H.a El Rahman

Open Access

https://doi.org/10.21608/avmj.2015.170039

Copy DOI

Abstract

Transition from pregnancy to lactation in dairy bufallo cows involves considerable metabolic adaptation. Additional stress is incurred during infections such as post-partum mastitis. The effect of naturally acquired bacterial infection of the buffalo udders on the activity of the milk triiodothyronine (T3) content, from healthy (control) and inflamed quarters, was determined to develop a better understanding of thyroid metabolism in buffalo. The diagnostic procedure included history and clinical examination of the udder, macroscopic evaluation of secretions, the California Mastitis Test (CMT), determination of somatic cell counts, bacteriological examination of milk and some biochemical parameters (AST, ALP, LDH, Malondialdehyde, calcium, phosphorus, sodium and chloride) of the same milk samples. The associations between T3 and other milk constituents were investigated, as well as the relationships between the bacterial species isolated from milk and others biochemical parameters. Bacterial examination, somatic cell counts (SCC) and the percentages of milk constituents were analyzed in 42 buffalo cows suffering from subclinical mastitis in one or more than one udder quarters, as well as from 8 healthy control buffalo cows. In single bacterial isolation, E.coli was the highest isolated bacteria from different scores of SCC (19 %) followed by coagulase negative staphylococcus (CNS) and other streptococci (14.3 % for each) meanwhile the Staphylococcus aureus (S.aureus) was the lowest isolate (9.5%). On the other hand, in mixed bacterial infection E.coli with S.aureus and other strept. was the highest categegory (16.7 %) followed by S.aureus with E.coli (14.3 %) while CNS with E.coli was the lowest one (11.9 %) .It has been found that milk parameters from inflamed quarters were decreased when compared with controls. The decrease in the milk T3 from subclinical mastitic buffaloe cows was manifested when somatic cell counts were > 5 ×105 / ml milk. These results suggest that the marked decreased T3 level and different milk contents in mammary secretions during naturally occurring subclinical mastitis is associated with the severity of inflammation. Milk enzymes (AST, ALP and LDH) as well as Malondialdehyde, calcium and phosphorus were detected. Significant elevation of liver enzymes, sodium and chloride were noticed in subclinical mastitis cases than healthy control udder. This study confirms the close inter-relationship between the thyroid hormone (T3), biochemical parameters and different milk constituents and the severity of bacterial infection causes udder mastitis in addition to bufallo udder health.

Highlights

Animal and human milk has been shown to organisms spread infection in the herd, this represents contain nutrients and biologically active an important feature of the epidemiology of many molecules such as hormones, growth factors and forms of bovine mastitis
When cow composite milk samples are taken, the quarter with a high somatic cell count (SCC) and lower milk quality is often masked due to the effect of milk from the healthy quarters. (Berglund et al, 2004), which could affect the bulk-tank milk associated with a decrease in the percentages of lactose and fat in milk, where the mammary epithelial cells can be damaged by bacteria, resulting in a reduced ability to synthesize milk components
This study confirms the close interrelationship between the thyroid hormone (T3), biochemical parameters, milk constituents and the severity of bacterial infection mastitis in addition to bufallo udder health

Summary

Introduction

Animal and human milk has been shown to organisms spread infection in the herd, this represents contain nutrients and biologically active an important feature of the epidemiology of many molecules such as hormones, growth factors and forms of bovine mastitis Many of these mammary gland secretory 1982). Like the growth hormones (GH), the TH have the potential to increase milk production markedly (S Â LEBODZINÂ SKI et al, 1991) These biologically active molecules may elicit a variety of local reactions during inflammation and may protect the neonate against infection during the period before its own immune system is completely developed (Na et al, 1997)

Methods

Discussion

Conclusion