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Mechnical masking of neurosensory pathways at the calf-teat interface: endocrine, reproductive and lactational features of the suckled anestrous cow


, : Mechnical masking of neurosensory pathways at the calf-teat interface: endocrine, reproductive and lactational features of the suckled anestrous cow. Theriogenology 35(5): 931-941

A mammary somatosensory mask was employed in suckled anestrous beef cows to attenuate signals that were hypothesized to play a direct regulatory role in postpartum anestrus. Cows (n = 20) were randomly assigned to one of three treatment groups on Days 15 to 20 postcalving. The three treatments were: 1) masked (n = 7); 2) suckled (negative control, n = 6) ; and 3) weaned (positive control, n = 7). Four layers of surgical glove latex were used to cover the teats and ventro-lateral prominence of the udder of masked cows with a nonhardening, nontoxic adhesive (Day 0). Masks were designed to prevent direct contact between the skin of the teat/udder and the mouth of the calf and to allow normal suckling and milk removal. Masks were left in place for 7 d, with calves in the weaned group removed to a remote location for 7 d. Calves in the suckled group were allowed ad libitum suckling. Calves in the masked group tended (P < 0.1) to suckle longer than calves in the suckled control group (11.3 +/- 1.3 vs. 7.8 +/- 1.3 min/suckle) posttreatment; however, suckling frequency and calf weight gains did not differ due to treatment. Weaned cows exhibited a four-fold increase (P < 0.01) in the frequency of luteinizing hormone (LH) pulses on Day 2 relative to suckled and masked cows. The percentage of animals ovulating within 12 d after treatment differed (P < 0.05) and was 100, 50 and 0% for weaned, suckled and masked cows, respectively. Presence of the latex mask allowed essentially normal suckling and lactation, but failed to attenuate (and may have potentiated) the negative effects of suckling on secretory patterns of LH, ovulation and estrus.

US$29.90

PMID: 16726961


Other references

Reed D.E., 1976: The seasonal occurrence of mosquito species in rice fields in western fresno county california usa. Proceedings of the Annual Meeting of the Utah Mosquito Abatement Association (29): 29-31

Ito, M.; Yamagoe, S.; Tomizawa, K.; Mizuno, S.; Tanokura, M.; Suzuki, K., 1997: Preparation of recombinant six-histidine-tagged human LECT2, a chemotactic protein to neutrophils, in Escherichia coli. LECT2 is a chemotactic protein to neutrophils. A recombinant six-histidine-tagged human LECT2, (His)(6)-LECT2, was expressed in E. coli using a pET21a(+) vector. The (His)(6)-LECT2 was purified from the soluble fraction in E. coli as a single band...

Olby, R.C., 1963: Charles Darwin's znanuseritp of Pangenesis. British Journal for the History of Science, 1(3): 251-263

Holmes, G.L.; Riviello, J.J., 1999: Midazolam and pentobarbital for refractory status epilepticus. Status epilepticus, a serious, life-threatening emergency characterized by prolonged seizure activity, occurs most commonly in pediatric patients. Although initial therapies with agents such as diazepam, phenytoin, or phenobarbital generally termi...

Czarnetzki, A.; Pusch, C.M., 2002: Classification of a 300,000-year-old dental crown of the upper loamy deposit of the Bad Canstatter travertine zone. Hominid dental remains were recovered in association with fossil bones and artifacts during systematic excavations in a loamy deposit located between the two travertine zones T4 and T5 at Stuttgart-Bad Cannstatt, Southwest Germany. Direct dating o...

Travers, C.; Martin-Khan, M.; Lie, D., 2010: Performance indicators to measure dementia risk reduction activities in primary care. The increasing burden of chronic diseases including cardiovascular and cerebrovascular disease, diabetes and dementia has led to greater emphasis on health promotion, prevention and early intervention (PPEI) activities within primary care. At the...

Sam, Teng Wah, 1993: Toxicity testing using the brine shrimp Artemia salina. Colegate, S M , Molyneux, R J Bioactive natural products: Detection, isolation, and structural determination 441-456

Ihle, J.N., 1995: Signaling through the cytokine receptor superfamily. Experimental Hematology (Charlottesville) 23(8): 797

Labban Raed; Veranth John M.; Chow Judith C.; Engelbrecht Johann L.P.; Watson John G., 2004: Size and geographical variation in PM (sub 1) , PM (sub 2.5) and PM (sub 10) ; source profiles from soils in the Western United States. Water, Air and Soil Pollution 157(1-4): 13-31

Gordon, M., 1987: Darkroom diseases and how to combat them. Journal of the Royal Society of Health 107(3): 102-103