Experiments were done in the chloralose-anesthetized, paralyzed, and artificially ventilated rat to determine the cardiovascular responses elicited during chemical stimulation of bed nucleus of the stria terminalis (BST) and to investigate the components of the peripheral autonomic nervous system that mediate these responses. Neurons in BST were selectively stimulated by the microinjection (10-20 nl) of the excitatory amino acid L-glutamate (1 M). Stimulation of BST elicited decreases in mean arterial pressure (n = 105) of -6 to -55 mmHg. These depressor responses were on occasion (n = 60) accompanied by decreases in heart rate ranging between -10 and -40 beats/min. The largest depressor responses were consistently elicited from a crescent-shaped region of BST around the dorsolateral, lateral, and ventrolateral surfaces of the anterior commissure. Intravenous administration of the muscarinic receptor blocker, atropine methylbromide, had no affect on the magnitude of the mean arterial pressure and heart rate responses. On the other hand, administration (intravenous) of the nicotinic receptor blocker, hexamethonium bromide or arfonad, abolished both the depressor response and cardiac slowing during stimulation of BST. These data suggest that the BST depressor and the bradycardia responses are mediated by inhibition of both sympathetic vasoconstrictor fibers to the vasculature and cardioacceleratory fibers to the heart, respectively.

The objective was to evaluate the analgesic efficacy of pre- and postoperative administration of meloxicam on the postsurgical convalescence period of lame dairy cows undergoing resection of the coffin joint. In a blinded, placebo-controlled, explorative clinical trial, 19 lame German Holstein-Friesian cows weighing 536 ± 98 kg (mean ± SD) and aged 5.7 ± 2.8 yr were included. All cows suffered from unilateral lameness due to septic arthritis of the coffin joint. Lame cows were randomly allocated to either the meloxicam group (n=9) or the control group (n=10) and received an intravenous injection of meloxicam (0.5mg/kg of BW) or an equal volume of saline immediately before surgery (d 0) and once daily from d 1 to 4. All cows received a retrograde intravenous local anesthesia (20 mL of procaine 2%) before the surgical intervention. Heart rate, respiratory rate, body temperature, plasma concentrations of cortisol, as well as production parameters (milk yield and feed intake) were evaluated from d 0 to 7. The gait of the animals was assessed daily by lameness scores and by monitoring the cows' activity by means of pedometers attached to both hind legs. Possible adverse effects on abomasal mucosal integrity were monitored by fecal occult blood tests and blood cell counts from d 0 to 7 and on d 14. Under meloxicam treatment plasma cortisol levels, lameness scores, and body temperature were significantly reduced compared with controls. While being treated with meloxicam, the time cows were standing per day was significantly longer compared with controls. In the healthy limb significantly more steps were registered in meloxicam-treated cows than in controls. Feed intake and milk yield were not significantly affected by meloxicam. No group differences were found in number of positive tests for fecal occult blood or blood cell counts. In conclusion, repeated meloxicam application demonstrated effective analgesia in the postsurgical period after resection of septically infected coffin joints in dairy cows without indications of evoking adverse effects on abomasal integrity.

Short-term effects of therapeutic claw trimming in acutely lame cows (n=21) with nonadvanced claw horn lesions on the endocrine, metabolic, and behavioral stress responses were investigated in comparison to regular claw trimming in nonlame control cows (n=21). Controls were matched to lame cows by parity and stage of lactation. Lame cows suffering from typical sole ulcers or white line disease were blinded and randomly assigned to 2 treatments, receiving 15 min before interventions either ketoprofen (n=11; 3mg/kg of BW intramuscularly; Romefen, Merial, Lyon, France) or placebo (n=10; saline in equivalent amount and route of administration). All cows underwent functional claw trimming in lateral recumbency on a surgical tipping table, and claw horn lesions in lame cows were conventionally treated (removal of loose horn, block on opposing claw, bandaging of affected claw). Blood samples collected 15 min before, at the end, and 24h after claw trimming were analyzed for concentrations of cortisol, fatty acids, lactate, and glucose, and fecal samples (collected before treatment and after 24 h) for cortisol metabolites. Behavioral stress responses during functional and therapeutic claw trimming were recorded. Concentrations of blood cortisol, fatty acids, glucose, and fecal cortisol metabolites were higher in lame than in nonlame cows after treatment. During claw treatment, more leg movements were recorded for lame cows than nonlame cows. Pre-emptive administration of ketoprofen had no obvious effects on stress responses to therapeutic claw trimming. Treatments of claw horn lesions caused a significant stress and pain reaction in acutely lame cows, demonstrating the necessity of adequate pain management protocols for such interventions.

The perception of prosodic cues in human speech may be rooted in mechanisms common to mammals. The present study explores to what extent bats use rhythm and frequency, typically carrying prosodic information in human speech, for the classification of communication call series. Using a two-alternative, forced choice procedure, we trained Megaderma lyra to discriminate between synthetic contact call series differing in frequency, rhythm on level of calls and rhythm on level of call series, and measured the classification performance for stimuli differing in only one, or two, of the above parameters. A comparison with predictions from models based on one, combinations of two, or all, parameters revealed that the bats based their decision predominantly on frequency and in addition on rhythm on the level of call series, whereas rhythm on level of calls was not taken into account in this paradigm. Moreover, frequency and rhythm on the level of call series were evaluated independently. Our results show that parameters corresponding to prosodic cues in human languages are perceived and evaluated by bats. Thus, these necessary prerequisites for a communication via prosodic structures in mammals have evolved far before human speech.

No abstract

Lahmheiten von Milchkühen unterliegen einer mittleren Prävalenz von 25 % und sind ein Ausdruck von Schmerzen und Leiden. Dies macht Lahmheiten zu einem der wichtigsten Animal-Welfare-Probleme in der Milchviehhaltung. Die Ursache der hohen Prävalenz ist vornehmlich in der Vorenthaltung einer sachgerechten Behandlung zu suchen. Ein konsequentes Eingreifen bestehend aus regelmäßigem Scoring und einer raschen Behandlung vermag auch bei hohen Inzidenzen die derzeitige Prävalenz auf 5 % zu senken. In einem zweiten Schritt ist die Inzidenz durch Prävention nachhaltig zu mindern. Landwirte müssen für das Thema sensibilisiert und in der Erkennung von Lahmheiten trainiert werden. Einleitung Eine im Jahre 2009 im Auftrag der European Food Safety Authority (EFSA) durchgeführte Risikoanalyse stellte Lahmheiten als eines der bedeutendsten Animal-Welfare-Probleme in der Milchviehhaltung heraus [7-9]. Dem Bericht zufolge handelt es sich um ein häufiges Problem, welches bei Kühen anhaltend erhebliche Schmerzen und Leiden hervorruft. Lahmheit ist keine Erkrankung an sich, sondern ein Symptom, eine Bewegungsänderung bzw. -störung, die sich aufgrund einer Erkrankung des Bewegungsapparats ergibt [11]. Dabei kann es sich um eine rein mechanische oder nervale Störung handeln. Meist beruht die Bewegungsstörung bei Kü-hen jedoch auf erlebtem Schmerz und dessen Vermeidung [32]. Etwa 90 % der Lahmheiten bei Milchkü-hen sind auf Erkrankungen der Klauen, meist denen der Hintergliedmaßen, zurück-zuführen [6, 30]. Die Erkrankungen können überwiegend infektiöser Natur sein (z. B. Dermatitis digitalis) oder sich als vornehmlich management-und haltungsbedingte Veränderung im Bereich des Klauenschuhs manifestieren (z. B. Sohlengeschwüre) [39]. Neben dem abnormen Gangbild zeigen lahme Kühe weitere Veränderungen in ihrem Verhalten. Zur Vermeidung lahmheitsbedingten Schmerzes liegen betroffene Kü-he vermehrt [28, 38] und gehen signifikant seltener zum Futtertrog [1]. Einmal am Trog, fressen sie dann zwar mehr und schneller, nehmen aber dennoch bei fortgeschrittener Erkrankung insgesamt weniger Trockenmasse auf [2, 16, 28]. Auch ihr Sozialverhalten ist verändert [15]. Lahme Kühe sinken in der Herden-Rangordnung [25, 38], sie sind unruhiger [19] und betreten den Melkstand später [25]. Animal Welfare Animal Welfare wird definiert über die Fä-higkeit des Tieres, mit seiner Umgebung zurechtzukommen [5]. Es geht um den Erfolg oder Misserfolg, sich an Lebensumstände anzupassen. Gelingt es dem Tier nicht, sich zu adaptieren, ist es anhaltend gestresst und befindet sich in einem schlechten Wel-134 Enke Verlag | veterinär spiegel 2010; 3: 134-138 Janßen S et al. Welfare-Problem Lahmheit bei Milchkühen -Initiative ist gefragt Heruntergeladen von: University of Pennsylvania Libraries. Urheberrechtlich geschützt.

No abstract