Abomasal secretion and emptying in suckled calves

Ash, R. W.

doi:10.1113/jphysiol.1964.sp007430

Cited by 62 publications

(43 citation statements)

References 7 publications

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“…This is in agreement with other observations made in the calf which showed that the outputs of enzymes were maximal 10-20 min (Grosskopf, 1959 ;Ash, 1964) (Guilloteau et al, 1975 and1979) and the curves of enzyme secretions showed that the trends were similar. Immediately after a meal, the pH was high (about 5) so that the enzymes secreted in large quantities could exert their coagulating activity.…”

Section: Methodssupporting

confidence: 82%

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Circadian changes in the abomasal secretions of the preruminant calf

Guilloteau¹,

Toullec²,

Beaufils³

et al. 1983

Reprod. Nutr. Dévelop.

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Summary. The purpose of this study was to investigate the circadian changes in the abomasal secretions (quantities of juice, enzymes and electrolytes) of the preruminant calf. The gastric juice was collected every hour from five calves fitted with an innervated abomasal pouch and given milk twice daily, with a 7-h interval between the morning and the evening meals.The amounts of gastric secretions produced were steady during 24 h, except for changes after the meals. The morning meal caused a considerable increase in secretions of electrolytes and enzymes. The values of CI-, H + , Na+ + and K + ions, chymosin and pepsin in the first postprandial hour were 3.8, 4.1, 3.5, 2.6, 2.4 and 2.1 times higher, respectively, than those of the 24th hour used as prefeeding levels. The influence of the evening meal on secretions of CI-and Na + ions and enzymes was less marked and also more delayed for all electrolytes. Variations in the amounts secreted per hour appeared to be greater for H + + ions than for enzymes, thus the ratios between maximal and minimal quantities observed during the 24-h cycle were 4.6 for H + ions and 2.8 for chymosin.Introduction.

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Section: Methodssupporting

confidence: 82%

“…The patterns of pH and total H + output in relation with feeding agreed with published results (Ash, 1964 ;Hill, Noakes and Lowe, 1970 ;Williams, Roy and Gillies, 1976). The variation of pH in the abomasal pouch was not representative of changes in the pH of the abomasal contents.…”

Section: Methodssupporting

confidence: 80%

Circadian changes in the abomasal secretions of the preruminant calf

Guilloteau¹,

Toullec²,

Beaufils³

et al. 1983

Reprod. Nutr. Dévelop.

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“…3 The volume of an ingested fluid meal is the most important determinant of the emptying rate in monogastric animals 4 and suckling calves. 5 Other physiologically important determinants of emptying rate are energy density (ie, caloric content) of a meal, [6][7][8] type of protein or fat, [9][10][11] and osmolarity of the solution. 12 Because an increased caloric content of an ingested meal slows gastric emptying rate, [6][7][8] we hypothesized that an OES containing a high-glucose concentration would be emptied more slowly in suckling calves than a low-glucose OES.…”

mentioning

confidence: 99%

Comparison of Two Oral Electrolyte Solutions and Route of Administration on the Abomasal Emptying Rate of Holstein‐Friesian Calves

Nouri

Constable

2006

Veterinary Internal Medicne

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Dehydrated calves with diarrhea are routinely given an oral electrolyte solution (OES) by suckling or esophageal intubation. An important issue related to rehydration therapy is the rate of OES delivery to the small intestine. It is widely assumed that the glucose content of the OES does not impact the speed of resuscitation and that fluid administered by esophageal intubation provides a similar resuscitative response to that obtained by suckling. The aims of this study were to compare the abomasal emptying rate in calves suckling an OES containing a high or low glucose concentration and in calves administered a high-glucose OES by suckling or esophageal intubation. Seven male Holstein-Friesian calves were given the following treatments in random order: 2 L of a commercially available high-glucose OES ([glucose] 5 405 mM) by suckling or esophageal intubation or 2 L of a commercially available low-glucose OES ([glucose] 5 56 mM) by suckling. Abomasal emptying rate was determined by acetaminophen absorption, ultrasonography, and glucose absorption. High-glucose OES rapidly increased plasma glucose concentration after suckling but produced a slower rate of abomasal emptying than did lowglucose OES. Esophageal intubation of high-glucose OES produced the same initial change in abomasal volume as did suckling, but delayed the rate of OES delivery to the small intestine. Our results suggest that suckling a low-glucose OES provides the fastest rate of abomasal emptying and plasma volume expansion, whereas a high-glucose OES provides the most appropriate oral solution for treating hypoglycemic calves.

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“…The activity of this organ is a subject which has been virtually ignored in recent years, since the currently accepted method of analysing abomasal activity involves the construction of a fistula, a process which precludes investigations during the immediately post-operative period (Ash, 1964). Furthermore, interpretation of the older literature is difficult since it was often not appreciated that enzymes other than rennin could clot milk and that rennin itself could have other protein substrates.…”

Section: Discussionmentioning

confidence: 99%

Proteolytic activity during the absorption of [¹³¹I]γ‐globulin in the new‐born calf

Hardy¹

1969

The Journal of Physiology

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SUMMARY1. Proteolytic activity within the small intestine of unsuckled calves less than 20 hr of age, anaesthetized with sodium pentobarbitone, has been assessed from the break-down of [131I]bovine serum y-globulin infused into the duodenum.2. Absorption of [131I]y-globulin was measured by analysis of venous blood, the levels of radioactivity attained in which were comparable with those when [131I]PVP K.60 (mean mol.wt. 160,000) was administered. When lymph collected from the thoracic duct during the absorption of [131I]y-globulin was injected into the femoral vein, the levels of radioactivity in the blood were close to those expected if the labelled material in the lymph had been retained within the plasma. These observations suggested that [131I]y-globulin was absorbed into the circulation of the anaesthetized young calf without significant break-down.3. Gel-filtration of lymph and plasma from calves fed [13I]y-globulin has confirmed that proteolysis before and during absorption was slight, since little 131I labelled material of low mol.wt. was found.4. Gel-filtration of the contents of the alimentary tract from calves fed [1311]y-globulin showed that some hydrolysis occurred in the abomasum and duodenum and that this was reduced by barbiturate anaesthesia. Protein break-down in the terminal ileum was slight both in the conscious animal and in animals anaesthetized with sodium pentobarbitone.

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Abomasal secretion and emptying in suckled calves

Cited by 62 publications

References 7 publications

Circadian changes in the abomasal secretions of the preruminant calf

Circadian changes in the abomasal secretions of the preruminant calf

Comparison of Two Oral Electrolyte Solutions and Route of Administration on the Abomasal Emptying Rate of Holstein‐Friesian Calves

Proteolytic activity during the absorption of [¹³¹I]γ‐globulin in the new‐born calf

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Abomasal secretion and emptying in suckled calves

Cited by 62 publications

References 7 publications

Circadian changes in the abomasal secretions of the preruminant calf

Circadian changes in the abomasal secretions of the preruminant calf

Comparison of Two Oral Electrolyte Solutions and Route of Administration on the Abomasal Emptying Rate of Holstein‐Friesian Calves

Proteolytic activity during the absorption of [131I]γ‐globulin in the new‐born calf

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Proteolytic activity during the absorption of [¹³¹I]γ‐globulin in the new‐born calf