Pneumonyssoides caninum infection--a risk factor for gastric dilatation-volvulus in dogs.
Vet Res Commun. 1998 Jun;22(4):225-31
Department of Small Animal Clinical Sciences, Norwegian College of Veterinary Medicine, Oslo, Norway.
The pathophysiology, clinical course and therapeutic management of gastric dilatation-volvulus (GDV) in dogs are well known. However, the aetiology remains elusive. Aerophagia has often been put forward as a contributing cause of GDV. The most common clinical sign in dogs with nasal mite (Pneumonyssoides caninum) infection is 'reversed sneezing', which may result in aerophagia. A prospective one-year necropsy study was conducted. Of 250 dogs, 17 were GDV cases and, of these, 35% had concurrent nasal mite infection compared to 5% in the control population. Multivariate logistic regression analyses performed using the 187 dogs with complete records included nasal mite infection status, age, weight and gender. Nasal mite infection was found to be the most important risk factor for GDV in this study, with an odds ratio and confidence interval of 27.6 (4.8-157.5). Other risk factors that were marginally significant included weight and age with odds ratios of 1.08 (1.02-1.13) and 1.37 (1.04-1.79), respectively. Gender was not found to be a significant risk factor for GDV. This study suggests that nasal mite infection may contribute to the development of GDV in otherwise predisposed dogs.Meteorological influence on the occurrence of gastric dilatation-volvulus in military working dogs in Texas.
Int J Biometeorol. 2008 Jan;52(3):219-22. Epub 2007 Aug 10.
Moore GE, Levine M, Anderson JD, Trapp RJ.
Department of Comparative Pathobiology, Purdue University, West Lafayette, IN 47907-2027, USA. email@example.com
Gastric dilatation-volvulus (GDV) is a life-threatening condition in dogs and other species in which the stomach dilates and rotates on itself. The etiology of the disease is multi-factorial, but explicit precipitating causes are unknown. This study sought to determine if there was a significant association between changes in hourly-measured temperature and/or atmospheric pressure and the occurrence of GDV in the population of high-risk working dogs in Texas. The odds of a day being a GDV day, given certain temperature and atmospheric pressure conditions for that day or the day before, was estimated using logistic regression models. There were 57 days in which GDV(s) occurred, representing 2.60% of the days in the 6-year study period. The months of November, December, and January collectively accounted for almost half (47%) of all cases. Disease risk was negatively associated with daily maximum temperature. An increased risk of GDV was weakly associated with the occurrence of large hourly drops in temperature that day and of higher minimum barometric pressure that day and the day before GDV occurrence, but extreme changes were not predictive of the disease.Dietary potassium-sodium imbalance as a factor in the aetiology of primary ruminal tympany in dairy cows.
Vet Res Commun. 1981 Dec;5(2):159-64.
Results of an investigation into the chemical composition of pasture herbage on twelve New Zealand dairy farms, with contrasting incidences of primary ruminal tympany (bloat), are presented. The data suggest that dietary K;Na ratio may be an important factor in the aetiology of bloat; a factor that does not seem to have been recognised in the past. Other supportive evidence for this hypothesis is briefly discussed.Nutrition: Is it a Factor in Bloat and Torsion? by Linda Arndt
Torsion: Could it be an Electrical Short-circuit?http://devinefarm.net/rp/rpfblt2.htmGastric myoelectric and motor activity in dogs with gastric dilatation-volvulus
AJP - Gastrointestinal and Liver Physiology, Vol 265, Issue 4 646-G653, Copyright © 1993 by American Physiological Society
J. A. Hall, T. N. Solie, H. B. Seim 3rd and D. C. Twedt
Department of Physiology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins 80523.
Electrical and contractile properties of the stomach were assessed in six adult dogs after recovery from surgical treatment for gastric dilatation-volvulus (GDV), a disorder characterized by delayed gastric emptying of the solid phase. Electrodes and strain-gauge force transducers were sutured to the serosa of the antrum and pylorus at the time of surgical intervention for GDV. Ten days after implantation, electrical and mechanical activities were recorded before and after a standardized meal. The analog FM tape recordings of the electrical and mechanical signals were converted to digital time series for analysis by computer. Recordings from dogs after GDV showed increased slow wave propagation velocity in both the fasting and the fed states compared with controls. In addition, the GDV dogs had atypical fasting state phase III activity fronts. We found no difference in gastric slow wave frequency, dysrhythmia, or electromechanical coupling between the two groups. These results indicate that delayed gastric emptying in this syndrome is associated with increased gastric slow wave propagation velocity.