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W M Goodchild 《British poultry science》1970,11(2):209-215
The positions of the air sacs and body cavities are described in relation to post‐mortem techniques and injection procedures. Certain modifications are recommended. 相似文献
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AV Pereira SA Pereira IDF Gremião MP Campos AMR Ferreira 《Australian veterinary journal》2012,90(11):448-450
This study compared the sensitivity of acetate tape impression and skin squeezing with that of deep skin scraping for the diagnosis of demodicosis in dogs. Demodex canis was detected in 100% of acetate tape impressions obtained after skin squeezing and in 90% of deep skin scrapings. There was a significant difference (P < 0.001) between the techniques in the total number of mites detected. Acetate tape impression with skin squeezing was found to be more sensitive than deep skin scraping and is an alternative diagnostic method for canine demodicosis. 相似文献
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Using techniques for treating the insects unanaesthetised, knockdown of aduit Musca domestica by pyrethrin I applied topically to or injected into the thorax was assessed by measuring the ED50s on 13 occasions 1 min-48 h after treatment. From 1 min to approximately 1 h after treatment, ED50s for topical application decreased quickly with increasing time. During this “knockdown phase” ED50 values were probably determined mainly by rate of penetration of the insecticide into the insect, but the rate of elimination of the insecticide probably determined the increasing ED50 values during the “recovery phase” which followed. ED50s for injected pyrethrin I were initially much smaller than after topical application but increased continuously until 24 h after treatment. From 100 min onwards ED50s by topical application and injection were similar. These results indicate (1) that the site affected during knockdown is within the insect rather than superficial, and (2) that detoxication and excretion processes determine the ultimate toxicity of the insecticide apparently independently of the method of treatment. Additional tests with a strain of flies having the penetration delaying factor and with the cockroach Periplaneta americana L. supported these conclusions. Speed of knockdown after topical treatment was also affected by the site of application and the solvent in which pyrethrin I was applied. Bioresmethrin was about as effective as pyrethrin I in knocking down flies when applied topically or when injected, but because the ED50 increased very little during the recovery phase it was ultimately much more toxic. 相似文献
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