摘要:

Thiamine deficiency diseases are briefly reviewed with particular attention to the use of blood thiamine levels in their diagnosis. Blood thiamine levels below 50 nmol/1 are considered significant with levels as low as 6–12 nmol/1 often being found in suspected cases of polioencephalomalacia.

ISSN:0048-0169    

DOI:10.1080/00480169.1986.35350

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

摘要:

A study was made to compare the numbers of infective ovine nematode parasite larvae on an open pastured block and an adjacent block forested withPinus radiateat 200 stems per hectare. Each block consisted of two paddocks which had similar nematode parasite egg contamination. Infective larvae of six genera were recovered over a 12 month period viz.,Trichostrongylusspp.,Ostertagiaspp.,Cooperiaspp.,Nematodirusspp.,Chabertia/Oesophagostomumspp. andHaemonchussp. A significantly higher recovery ofTrichostrongylusspp. (p<0.01) andOstertagiaspp. (p<0.05) from the pine forested block was probably due to the more favourable climatic environment under the pines.

ISSN:0048-0169    

DOI:10.1080/00480169.1986.35351

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

摘要:

Twelve adult cattle were electrically stunned head-only (400 V, 2.5 A, 50 Hz) behind the ears for four seconds. Within ten seconds of stun initiation, the carotid arteries, jugular veins, trachea and oesophagus were severed. Twenty seconds after the stun initiation, ten animals received an electro-immobilization current (80 V peak, 14.3 Hz, 5 ms square wave, 300 mA) nose to anus for periods ranging from 30–37 seconds. Electroencephalographic (EEC) traces were recorded before and after the stun up until electro-immobilization and at cessation of electro-immobilization by means of implanted electrodes, and animal movement was recorded on videotape. Before the stun, the EEG trace was within a “window of sensibility” (10–40 μV amplitude). During the stun, the amplitude increased and sometimes exceeded 500 μV. At the end of electro-immobilization, EEG amplitude was less than 10 μV. indicating insensibility. This amplitude was reached in the two non-immobilized animals 57 seconds and 63 seconds after stun initiation. During stunning, the forelegs and hindlegs usually tucked under the animals. Various degrees of foreleg extension then occurred. From about ten seconds post-stun, paddling movements occurred, at which time the EEG trace showed large-amplitude waves characteristic of a stunned animal. During immobilization, the animals stiffened and breathing stopped. After immobilization weak muscle spasms occurred that did not interfere with dressing operations. Non-immobilized animals moved excessively, inhibiting dressing. It is concluded that adult cattle rendered insensible by stunning do not recover sensibility during the stun/throat-cut/immobilization operation and therefore this procedure is humane.

ISSN:0048-0169    

DOI:10.1080/00480169.1986.35352

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

摘要:

A technique for the surgical relocation of the carotid artery, to permit repeated percutaneous puncture, in red deer, is described.

ISSN:0048-0169    

DOI:10.1080/00480169.1986.35353

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

摘要:

Sixteen pairs of identical twin dairy calves were reared together and at one year of age subjected to a test of uniformity of response to sporidesmin intoxication. The response was measured by scoring livers for toxic injury and by measuring serum gamma-glutamyltransferase at weekly intervals after dosing.

ISSN:0048-0169    

DOI:10.1080/00480169.1986.35354

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor

摘要:

Extract

ISSN:0048-0169    

DOI:10.1080/00480169.1986.35356

出版商:Taylor & Francis Group    

年代:1986

数据来源: Taylor