Usefulness of Acidity and Temperature of the Rumen and Abomasum in Diagnosing SARA in Dairy Cows after Calving

Abstract

The aim of the research was to determine the relationship between the acidity and temperature of the contents of the reticulorumen and abomasum in the first 10 days after calving and to evaluate these factors as predictive traits for the diagnosis of subclinical acidosis.The acidity and temperature of the contents of the reticulorumen and abomasum were measured using specific smaXtec boluses manufactured for animal care. According to the directions of the manufacturer, the boluses were inserted into the reticulorumen of the cows researched with the help of a specific tool. The boluses were inserted into the abomasa by way of surgery, laparotomy and abomasotomy through the right flank. The readings of 7 cows were taken on a total of 10 days, twice a day (at 9 a.m. and at 9 p.m.). In total, 140 measurements were taken.The acidity of the reticulorumen is associated with the acidity of the abomasum. The acidity of the rumen increases, if the acidity of the reticulorumen increases also. A negative correlation was observed between the pH of the contents of the abomasum and this temperature. The increase in the acidity (decrease of pH) of the contents of the reticulorumen increases its temperature and also increases the temperature of the contents of the abomasum. There is a positive statistically significant dependence between the reticulorumen content temperature and the rectal temperature.Through measurement of the ruminoreticular temperature, it is possible to predict the health status of a cow's stomach in regard to acidosis.

Relationship between pH of ruminal fluid during subacute ruminal acidosis and physiological response of the Polish Holstein-Friesian dairy cows

“…Plaizier et al (2012) suggest that disorders associated with SARA could cause local inflammation of the rumen mucosa (rumenitis), which also increases the rectal temperature. Antanaitis et al (2016) showed that decrease of ruminal fluid pH during SARA increase the reticulorumen temperature which is correlated with the rectal temparature. Therefore, regular measurement of body temperature could be part of a routine systemic monitoring in cattle farms (Drillich et al 2001).…”

Joint Antenna-Channel Modelling for in-to-out-Body Propagation of Dairy Cows at 868 MHz

“…In this situation, the free space antenna gain cannot be used for calculating the in-to-out-body path loss. In literature [11], [12] the antenna gains are included in the WBAN path loss calculation given by (1). Thus, the path loss including the antenna gains as a part of the channel model (P L incl ) is calculated as follows:…”

“…Monitoring health indicators in real time using sensors enables large dairy farms to optimize their profits as well as increase their cow welfare. Ruminal temperature and pH are important parameters to assess the nutritional and health status of dairy cows and to predict anomalies (e.g., metabolic disorders after calving) [1]. However, these parameters can be measured only using in-body sensors.…”

Experimental characterisation of in‐to‐out‐body path loss at 433 MHz in dairy cows

“…Ruminal temperature and pH are important parameters to assess the nutritional and health status of dairy cows and to predict anomalies (e.g. metabolic disorders after calving) [1]. However, these parameters can be measured only by using in-body sensors.…”

“…The low realised gain is due to the strong mismatch in the air (|S11| ≈ − 0.9 dB) since the antenna was specifically designed for in-body applications and relies on dielectric loading by tissues to achieve higher efficiencies [6]. The values of the realised gain in air and in-body were used to calculate the de-embedded antenna path loss (1). Finally, to model the path loss as a function of the TX-RX separation, a log-distance path loss model was used.…”