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A total of 42 birds from a flock of 104 farmed ostriches showed signs of toxicity after the accidental inclusion of monensin in their concentrate ration. The initial clinical signs were muscle weakness and ataxia which progressed to recumbency, dyspnoea and death, despite intensive supportive therapy. The serum activity of the enzymes creatine kinase, aspartate aminotransferase and lactate dehydrogenase was high in the affected birds, indicating significant muscle pathology. Few gross lesions were identifiable postmortem, but widespread lesions of degenerative myopathy were present at the histopathological level. However, these degenerative changes were restricted to the skeletal muscle and there was no evidence of cardiomyopathy in any of the birds examined. The birds were fed a ration which contained 215 to 224 ppm monensin for 13 days. New clinical cases ceased to occur shortly after the withdrawal of the source of monensin, but all the individuals which showed clinical signs of toxicity died or were euthanased on humane grounds.
Vet Rec 1997 Jun 14
PMID:Monensin toxicity in a flock of ostriches. 922 93

Plasma chemistry and haematological studies were conducted on chickens with coccidiosis. Male White Leghorn chickens, of two weeks old, were inoculated with 5 x 10(4) Eimeria tenella sporulated oocysts or with 1 x 10(6) E acervulina sporulated oocysts. Blood samples were taken four, seven and 11 days after inoculation. A wet chemistry system was applied to measure the plasma activities of aspartate aminotransferase, alanine aminotransferase, alkaline phosphatase, gamma glutamyltransferase, creatine kinase, amylase and lactate dehydrogenase and the concentrations of creatine, total bilirubin, urate, total cholesterol, total protein, albumin, glucose and triglycerides. A dry chemistry system was applied to measure sodium, potassium, chloride and calcium. The number of red blood cells and packed cell volume were determined by a micro cell counter and blood pH was measured with a blood gas analyser. The erythrocyte count, packed cell volume, sodium and chloride levels in the chickens infected with E tenella were significantly (P < 0.05) lower than those of the uninfected controls. The significant decrease in blood pH of the chickens infected with E acervulina suggests malabsorption associated with duodenal lesions induced by the infection.
Vet Rec 1997 Jul 12
PMID:Evaluation of plasma chemistry and haematological studies on chickens infected with Eimeria tenella and E acervulina. 925 31

One hundred and nine dogs were diagnosed as having been poisoned by viper (Vipera xanthina palestinae) venom between 1989 and 1996. Most of the cases occurred between April and September (86.2 per cent), with peaks in May (25.7 per cent) and July (20.2 per cent), and very few between November and February (3.6 per cent). Forty-two per cent of the dogs were poisoned in the evening (18.00 to 22.00), with a relative risk of 6.85, 17.4 per cent between 22.00 and 02.00, and 16.5 per cent between 14.00 and 18.00. The median age of the dogs was three years, and almost 80 per cent of them were from rural households. German shepherd dogs and rottweilers were over-represented (relative risk 1.98 and 1.87 respectively), and mongrel dogs and pinschers were under-represented (relative risk 0.41 and 0.53 respectively). Fifty-six per cent of the bites were on the head (excluding the mouth, lips and pinnae), 16.5 per cent on the front limbs, 9.7 per cent on the mouth and lips, 8 per cent on the hindlimbs, 4.4 per cent were submandibular and 5.4 per cent were at other sites. The main clinical signs were local swelling (98.2 per cent) and oedema (94.5 per cent), panting (45.7 per cent), tachypnoea (42.5 per cent), pain (34.9 per cent), tachycardia (29.8 per cent), lameness (25.7 per cent), and lymphadenomegaly (23.9 per cent). The mortality rate was 3.7 per cent. The most common haematological abnormalities were neutrophilia (67.6 per cent), leucocytosis (54.9 per cent), thrombocytopenia (51.9 per cent), increased haematocrit (47.6 per cent), and a left shift of neutrophils (37.8 per cent). Many biochemical abnormalities were observed, of which the most common were high activities of lactate dehydrogenase (84.6 per cent), creatine kinase (69 per cent), gamma-glutamyltransferase (40 per cent) and aspartate aminotransferase and high concentrations of globulin, phosphate and total bilirubin (33.3 per cent in each case).
Vet Rec 1999 May 08
PMID:Retrospective study of the epidemiological, clinical, haematological and biochemical findings in 109 dogs poisoned by Vipera xanthina palestinae. 1083 42

In order to determine the effects of chronic, high-altitude hypoxia on the ovine fetal heart, we exposed pregnant ewes to 3,820 m beginning at 30 days gestation. We previously showed that following approximately 110 days of hypoxia the fetal heart showed significant reduction in cardiac output (76% of control) and contractility, and elevated levels of citrate synthase and lactate dehydrogenase. To investigate ultrastructural influences on these observed physiologic changes at altitude, we hypothesized that the volume densities of myofibrils and mitochondria, and glycogen content would be reduced in the ovine fetal heart and that this may contribute to contraction and cardiac output deficits in hypoxia. Mitochondria and myofibril volume density were determined by standard point-counting techniques and glycogen content was determined by biochemical analysis. The glycogen content from the hypoxic right ventricle (4.8 +/- 0.3%) was significantly lower than in control right ventricle (6.8 +/- 0.5%) and both left ventricles (hypoxia, 7.2 +/- 0.5; control, 7.8 +/- 0. 4%). Total mitochondrial volume density was also significantly reduced following hypoxia (15.5 +/- 0.7%) compared to controls (16.9 +/- 0.4%). As is common in the ovine fetal heart, the myofibril volume density of the right ventricle from both groups was significantly higher than the left ventricle (RV, 58.6 +/- 1.6; LV 54.3 +/- 0.9%). However, it was not different between control and high altitude. In support of our hypothesis, we may speculate that deficits in the quantity of myocyte glycogen and mitochondria contribute to the observed reduction in cardiac output and contractility, despite the upregulation of citrate synthase and lactate dehydrogenase. In contrast, myofibril volume density was unchanged.
Anat Rec 1999 12 01
PMID:Quantitative electron microscopic study of the hypoxic fetal sheep heart. 1058 24

A clinical biochemistry analyser designed specifically for veterinary use was used to analyse plasma samples from 24 vervet monkeys (Cercopithecus aethiops). Two millilitres of heparinised blood was collected from each of the 24 monkeys on four occasions at intervals of one week. Plasma was separated and analysed for the concentrations of triglycerides, cholesterol, total proteins, albumin, globulins, creatinine and blood urea nitrogen (BUN) and the activities of alkaline phosphatase (AP), lactate dehydrogenase (LDH), alanine aminotransferase (ALT), aspartate aminotransferase (AST), and creatine kinase (CK). The tests were easy to perform, used small volumes of plasma, and yielded consistent results for most of the analytes. The activities of CK and AP, but not AST, appeared to be influenced by haemolysis, and there were significant individual variations in the activity of LDH.
Vet Rec 2000 May 20
PMID:Application of the Vettest 8008 system for the biochemical analysis of vervet monkey plasma. 1087 Jul 65

Twenty-four dogs with a parasitologically and serologically established diagnosis of leishmaniasis were studied to investigate the atrophy of the masticatory muscles which commonly occurs in this disease, and to compare the lesions in the masticatory muscles with those in the cranial tibial muscles. The 24 animals were divided into three groups of eight, group A dogs with no muscular atrophy, group B dogs with different degrees of atrophy in the masticatory and skeletal muscles, and group C dogs with similar degrees of atrophy in the masticatory and skeletal muscles. Increased activities of creatine phosphokinase and lactate dehydrogenase were recorded in only some of the dogs in groups B and C, but there were no significant differences between the mean activities in the three groups. Electromyographic changes indicating myopathy and involving both the temporalis and cranial tibial muscles, were observed in two of the dogs in group A, seven of those in group B, and in all the dogs in group C. Muscle histopathology revealed a variable degree of muscle fibre necrosis and atrophy, mononuclear infiltrates and neutrophilic vasculitis in all the dogs except two in group A. Leishmanial amastigotes were found within macrophages and myofibres in 16 of the dogs, some in each group. IgG immune complexes were detected in muscle samples, and circulating antibodies against myofibres were detected in serum samples from all the 24 dogs.
Vet Rec 2000 Jun 10
PMID:Masticatory and skeletal muscle myositis in canine leishmaniasis (Leishmania infantum). 1088 83

Two groups of 26 lambs were transported for 15 hours either on smooth highways or on rougher secondary roads. Nine of the animals in each group were monitored for heart rate and the plasma levels of cortisol, creatine kinase and lactate dehydrogenase, before the journey began, after four, eight and 12 hours and at slaughter. The pH of the meat was measured 45 minutes and 24 hours postmortem and its colour was assessed 24 hours postmortem. The lambs transported on smooth roads had a lower heart rate and lower plasma cortisol concentrations after eight and 12 hours than the lambs transported on rougher roads. Twenty-four hours after slaughter the pH of the meat of the lambs transported on smooth roads was lower than that of the lambs transported on rougher roads.
Vet Rec 2001 Feb 24
PMID:Effects of vehicle movements during transport on the stress responses and meat quality of sheep. 1128 48

Twelve groups of falcons, each containing three female gyrfalcon-peregrine falcon hybrids (Falco rusticolus x Falco peregrinus) were injected intramuscularly with a single dose of ivermectin ranging from 0.2 mg/kg to 11 mg/kg bodyweight, and a control group was injected with water. Doses of ivermectin between 0.2 and 5 mg/kg failed to produce clinical signs of illness in the birds. Four birds which received either 6, 7 or 8 mg/kg showed slight clinical signs, and all the birds receiving 9 to 11 mg/kg showed more or less severe clinical signs of anorexia, apathy and sedation. Slight changes in the mean plasma activities of aspartate aminotransferase, alanine aminotransferase and alkaline phosphatase (AP) were detected in the group dosed with 5 mg/kg, and higher dosages caused marked changes in these enzymes as well as in the mean plasma activity of lactate dehydrogenase. The mean activity of AP decreased, and the activities of the other enzymes increased. A dosage of 2 to 3 mg/kg ivermectin is recommended as a safe and effective antiparasitic drug for falcons and it has been used successfully to treat infestations of Serratospiculum species.
Vet Rec 2001 May 12
PMID:Evaluation of the dosage of ivermectin in falcons. 1138 46

Three adult brown pelicans (Pelicanus occidentalis) were observed to be weak, anorexic and unresponsive to antibiotics, anti-inflammatory drugs, vitamins including vitamin E, and steroids. Blood chemistry revealed high activities of aspartate aminotransferase, creatinine kinase and lactate dehydrogenase. Radiographs of the birds' leg muscles revealed multiple opacities suggestive of calcification; the gross lesions included white streaks in the leg, wing, and heart muscles, and the microscopical lesions consisted of various degrees of degeneration and necrosis characterised by eosinophilia, variations in fibre size, loss of striations, myolysis, mineralisation, and proliferation of mononuclear cells in the skeletal muscles and the myocardium. The levels of heavy metals, selenium and vitamin E in the birds' livers were not abnormal. The level of peroxide in their diet of capelin fish was high, 69 meq/kg, (normal <20 meq/kg) consistent with rancid feed, and the level of vitamin E was very low, 0.5 iu/kg (normal 20 to 30 iu/kg). It was concluded that the myopathy was probably caused by vitamin E deficiency due to feeding the pelicans a rancid diet.
Vet Rec 2002 Mar 09
PMID:Myopathy in brown pelicans (Pelicanus occidentalis) associated with rancid feed. 1191 85

Over a period of seven years, 262 recumbent dairy cows were investigated, and serum samples were analysed for creatine phosphokinase (CPK), lactate dehydrogenase (LDH) and aspartate aminotransferase (AST) activities. The results from cows for which all three measurements were available, were analysed statistically by the non-parametric receiver operating characteristic (ROC) method, to evaluate the value of the serum enzyme activities for predicting a failure to recover. The sensitivity and specificity of the activity levels were calculated over all cut-off points, and ROC curves were created by plotting sensitivity as a function of 1--specificity at each cut-off point for samples grouped by the interval after the cows became recumbent. The predictive values of the tests were compared by calculating the areas under the curves, and the positive and negative predictive values of the tests were calculated and plotted against the prevalence of a failure to recover. The results from each of the enzymes were significantly better than from a random test with no discriminatory ability. The optimal cut-off points maximising the sensitivity and specificity of the tests were 2330, 2225 and 171 U/litre for CPK, LDH and AST, respectively. The predictive value of AST was significantly better than that of CPK or LDH, and measures made on the second and third day of recumbency were significantly better with optimal cut-off points of 128 and 189 U/litre, respectively.
Vet Rec 2003 Jun 21
PMID:Value of measurements of the serum activities of creatine phosphokinase, aspartate aminotransferase and lactate dehydrogenase for predicting whether recumbent dairy cows will recover. 1284 88


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