Analysis of Survivorship After Displaced Abomasum is Diagnosed in Dairy Cows

Abstract

The objective of this study was to analyze the survivorship of dairy cows after displaced abomasum was diagnosed. Survivorship from the calving preceeding diagnosis of displaced abomasum to removal from the herd was investigated for cows that were diagnosed with displaced abomasum compared with herdmates. For cows that were diagnosed with displaced abomasum, factors that affected survivorship from the diagnosis of the disease to removal were investigated. Data from a total of 135 cows that had been diagnosed with displaced abomasum and 373 controls matched by herd and lactation number were available from a database at the University of Guelph. The hazard rate of removal from the herd was estimated using proportional hazard regression adjusted for intraherd correlation. Diagnosis of displaced abomasum significantly increased the hazarad rate of removal from the herd. For cows that were diagnosed with displaced abomasum the hazard rate of removal increased as parity increased. However, the hazard rate decreased with recurrent displaced abomasum and with higher days in milk at diagnosis of the disease. Although the 305-d milk production of cows that were diagnosed with displaced abomasum was lower during the lactation when the disease was diagnosed, 305-d milk production was not associated with removal of cows with that disease from the herd. Milk production during subsequent lactations did not differ between cows that were diagnosed with displaced abomasum and control cows. Low milk production during the subsequent lactations increased the hazard of removal of cows with that disease from the herd.

New Insights on Left Displaced Abomasum in Dairy Cows

“…Inappetence developed with abomasal displacement with reduced absorption from the gut may produce hypocalcemia Rohrbach et al (1999) and Delgadolecaroz et al (2000). Puerperal hypocalcaemia considered as an important predisposing cause for abomasum displacement Geishauser et al (1998) and Houe. et al (2001) as hypocalcaemia decreases the abomasal motility which is the predisposing cause for abomasal displacement Radostits et al (2000) and DelgadoLecaroz et al (2000).…”

Hematological, biochemical and ruminant parameters for diagnosis of left displacement of the abomasum in dairy cows from Southern Brazil

“…In Canada, the incidence of DA in animals in lactation is 2% (Geishauser et al, 1998). Approximately 24% of the specialized dairy cows herds have at least one case of LDA in a period of three years (Coppock et al, 1972).…”

Relationship between concentration of citrate and ketone bodies in cow's milk

“…This condition is associated with decreased body condition and milk yield, impaired reproductive performance and increased risk of clinical ketosis. The early detection of elevated levels of ketone bodies during the subclinical stage of energy deficiency is highly recommended as on this basis appropriate corrections in the herd management can be introduced to reduce the development of clinical ketosis and consequent losses of profits from milk production (Tóth et al, 1989;Kégl and Gaál, 1992;Fekete et al, 1999;Geishauser et al, 2000).…”

“…Nowadays, under field conditions, checking of the β-hydroxybutyrate and/or acetoacetate content of the blood plasma, serum, urine and milk is used to detect energy deficiency and to diagnose ketosis with test strips or other simple, inexpensive chemical reagents such as the Rothera-or Ross-test (Kégl and Gaál, 1992;Geishauser et al, 2000). In spite of the fact that laboratory analysis for ketone bodies is more sensitive than the field tests, biological fluids are rarely sent to the laboratory for ketone body determination alone.…”