Studies on natural cases of maedi in search for diagnostic laboratory methods     

M Gudnadòttir  G Gìslason  P A Pàlsson 《Research in veterinary science》1968,9(1):65-67

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Studies on acid oils and fatty acids for chickens. III. Effect of chemical composition on metabolisable energy of by‐products of vegetable oil refining     

B. Vilà  E. Esteve‐Garcia 《British poultry science》1996,37(1):131-144

1. Fourteen by‐products of oil refining, selected for their variability in free fatty acid and unsaponifiable contents, were analysed chemically with the objective of relating the determined ME values of the products to chemical composition by means of multiple linear regression analysis. Refined sunflower oil was included as a reference fat.

2. Twenty‐one 2‐week‐old chicks were used to determine fat digestibilities and AMEn values of diets, using the total collection method. Fats were included in a wheat‐soyabean meal diet at 100 g/kg. Multiple linear regression analysis was used to express the ME values of fats as functions of the parameters measured (moisture, gross energy, impurities, unsaponifiables, non eluted material, free fatty acid content, unsaturated: saturated ratio, peroxide value, TBA test).

3. The ME of the fat products lay in the range 12.62 to 24.35 MJ/kg, and 29.26 MJ/kg for refined sunflower oil. Free fatty acid content of the fats was shown to be a poor predictor of their ME values, whereas non eluted material (NEM) of the fat products showed a good correlation with their ME. A regression equation could be derived (R² = 0.6548; SEE = 2–0064) with the unsaturated: saturated ratio (U:S) and NEM. An ME prediction equation based on the U:S, NEM and unsaponifiable content is also proposed (R² = 0–7168; SEE= 1.9058).  相似文献   

Correlation between hydrolytic enzyme activities measured in bean seedlings afterTrichoderma koningii treatment combined with pregermination and the protective effect againstPythium splendens     

Alba Marina Cotes  Philippe Lepoivre  Jean Semal 《European journal of plant pathology / European Foundation for Plant Pathology》1996,102(5):497-506

An experimental protocol consisting in the colonisation of pregerminated bean seeds dressed withTrichoderma sp. was used in order to study the mechanisms correlated with the protective effect againstPythium splendens. Seed dressed with TH-11 (T. koningii) for 24 h presented a higher protective effect and a higher level of seed colonisation as compared to those dressed with TH-13 (T. longibranchiatum). The levels of seed coat colonisation by TH-11 and TH-13 was shown to be correlated with the carboxymethylcellulase activity, as measured in the seed coats retreived from germinating dressed bean seeds. The seed coat colonisation was also associated with an increased activities of endo-1,3--glucanase and endochitinase measured in seed extracts, and an inhibitory effect of seed extracts onPythium sporangia germination. Pretreatment of TH-13-dressed seeds with a commercial cellulase improved all parameters mentioned above, thus suggesting a role of cellulase activity in the colonisation process and the linked protective effect. The possible role of hydrolytic enzymes in the protective effects is discussed.  相似文献   

Laryngeal mask airway and transient hypercapnic hyperpnea for video‐endoscopic assessment of unilateral laryngeal paralysis in dogs          下载免费PDF全文

Daniel M. Sakai MV  DACVAA  Manuel Martin‐Flores MV  DACVAA  Amanda K. Jones PhD  Galina M. Hayes BVSc  PhD  DACVECC  DACVS‐SA  Marina J. McConkey DVM  DACVS‐SA  Jonathan Cheetham VetMB  PhD  DACVS‐LA 《Veterinary surgery : VS》2018,47(4):543-548

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Fine structure of the canal neuromasts of the lateral line system in the adult zebrafish          下载免费PDF全文

R. Laurà  F. Abbate  G. P. Germanà  G. Montalbano  A. Germanà  M. Levanti 《Anatomia, histologia, embryologia》2018,47(4):322-329

The mechanosensory lateral line system of fish is responsible for several functions such as balance, hearing, and orientation in water flow and is formed by neuromast receptor organs distributed on head, trunk and tail. Superficial and canal neuromasts can be distinguished for localization and morphological differences. Several information is present regarding the superficial neuromasts of zebrafish and other teleosts especially during larval and juvenile stages, while not as numerous data are so far available about the ultrastructural characteristics of the canal neuromasts in adult zebrafish. Therefore, the aim of this study was to investigate by transmission electron microscopy the ultrastructural aspects of cells present in the canal neuromasts. Besides the typical cellular aspects of the neuromast, different cellular types of hair cells were observed that could be identified as developing hair cells during the physiological turnover. The knowledge of the observed cellular types of the canal neuromasts and their origin could give a contribution to studies carried out on adult zebrafish used as model in neurological and non‐neurological damages, such as deafness and vestibular disorders.  相似文献   

Early resynchronization protocols for goats: Progestogens can be used prior to an early pregnancy diagnosis without affecting corpus luteum functionality     

Isabel Oliveira Cosentino  Mario Felipe Alvarez Balaro  Felipe Seabra Cardoso Leal  Lucas de Figueiredo Cardoso Barbosa  Fernanda Martins Gonçalves  Gabriel Feliciano Felizardo  Marina Monteiro Netto  Felipe Zandonadi Brandão 《Reproduction in domestic animals》2020,55(11):1655-1659

This study aimed to evaluate the exogenous progesterone (P4) effect on the luteal function from Day 16 to Day 21 of the oestrous cycle in inseminated goats with unknown pregnancy status. A total of 54 does passed through a short progestin-based synchronization protocol and, on Day 16 of the following oestrous cycle, 27 does received a new P4 device which was retained until Day 21. Blood samples were collected daily from all does during this period, as well as on Day 24. Pregnancy diagnoses were performed on Day 30. Serum P4 values from 26 animals (G_NPSP: Group of non-pregnant does with second sponge: n = 8; G_NPNSP: Group of non-pregnant does without second sponge: n = 6; G_PSP: Group of pregnant does with second sponge: n = 5; G_PNSP: Group of pregnant does without second sponge: n = 7) were determined by radioimmunoassay commercial kits. No P4 differences were found between groups (G_NPSP: 3.1 ± 2.8; 1.7 ± 1.8; 0.4 ± 1.0; and 0.0 ± 0.0 vs. G_NPNSP: 4.4 ± 1.8; 3.0 ± 2.2; 0.8 ± 0.8; and 0.0 ± 0.0 or G_PSP: 4.2 ± 1.0; 3.4 ± 0.6; 3.3 ± 1.6; 3.2 ± 0.9; 3.6 ± 1.2; 3.5 ± 1.3; 2.7 ± 1.3 vs. G_PNSP: 4.4 ± 1.6; 3.6 ± 1.5; 3.7 ± 1.5; 3.8 ± 1.4; 3.2 ± 1.2; 3.1 ± 1.2; 3.6 ± 1.1; D16, D17, D18, D19, D20, D21, D24, respectively) or for the interaction of group and time. In conclusion, a second progestogen device had no effect on luteolysis or early pregnancy in the following oestrous cycle.  相似文献   

Spontaneous poisoning by Hovenia dulcis in dairy cattle in Southwest Parana,Brazil     

Fabricio Bernardi  Marina Gabriela Possa  Mayane Faccin  Leonardo Gruchouskei  Carlos Eduardo Fonseca-Alves  Fernando Pípole  Luciana Retz de Carvalho  Fabiana Elias 《Tropical animal health and production》2016,48(1):211-214

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Plasmatic l‐lactate in pet rabbits: association with morbidity and mortality at 14 days          下载免费PDF全文

Maria Ardiaca  Sara Dias  Andres Montesinos  Cristina Bonvehi  Sara Barrera  Marina Cuesta 《Veterinary clinical pathology / American Society for Veterinary Clinical Pathology》2016,45(1):116-123

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Novel polymorphisms at codons 146 and 151 in the prion protein gene of Cyprus goats, and their association with natural scrapie     

Papasavva-Stylianou P  Kleanthous M  Toumazos P  Mavrikiou P  Loucaides P 《Veterinary journal (London, England : 1997)》2007,173(2):459-462

To discern whether an association exists between specific combinations of polymorphisms of the prion protein (PrP) and natural scrapie in Cyprus goats, 250 goats were examined, including 164 histologically positive cases. Previously reported amino acid polymorphisms were detected at codons 154 (R-->H), 168(P-->Q), 220(Q-->H) and 240 (S-->P) and nucleotide alterations at codons 42 (a-->g) and 138 (c-->t). Additionally, novel amino acid polymorphisms were detected at codons 146 (N-->S or D) and 151 (R-->H) and new "silent" mutations were found at codons 179 (V,g-->t), 181 (D,c-->t) and 219 (T,c-->t). The two novel polymorphisms at codon 146 were found only in the healthy control and scrapie-negative goats. By comparison, none of the scrapie-affected goats encoded these polymorphisms.  相似文献   

Sublethal effects of nine insecticides on Drosophila suzukii and its major pupal parasitoid Trichopria drosophilae     

Fabrizio Lisi  Ramzi Mansour  Carmelo Cavallaro  Tuğcan Alınç  Emanuele Porcu  Michele Ricupero  Lucia Zappalà  Nicolas Desneux  Antonio Biondi 《Pest management science》2023,79(12):5003-5014

Background

Although the pupal parasitoid Trichopria drosophilae is used in conservative and augmentative biocontrol of Drosophila suzukii infestations, current pest management strategies mostly rely on multiple insecticide applications. In this context, the aim of the study was to investigate the baseline toxicity of nine insecticides on D. suzukii larvae and their multiple sublethal effects (LC₁₀) on immature stages of the pest feeding on contaminated diet and T. drosophilae developing within the intoxicated host.

Results

Chlorpyriphos and azadirachtin showed the lowest and the highest LC₁₀, the values of which were 9.78 × 10¹³ and 1.46 × 10³ times lower than their recommended label field rate, respectively. Among tested insecticides, imidacloprid, malathion and dimethoate were the only treatments that did not affect the juvenile development time of D. suzukii, while spinosad and the organophosphates chlorpyriphos and dimethoate did not influence fly pupal size. No sublethal effects were recorded on T. drosophilae degree of infestation (DI) and juvenile development time. On the contrary, cyazypyr and dimethoate negatively affected the success of parasitism (SP) and the number of progeny of the pupal parasitoid, in association with malathion for the first parameter and spinosad for the fertility. Compared to the untreated control, more female progeny emerged following azadirachtin exposure, while dimethoate caused the opposite effect. Imidacloprid, lambda-cyhalothrin and spinetoram decreased hind tibia length of emerged parasitoids.

Conclusion

This study provides new insights on the (eco)toxicological profile of nine insecticides and new information needed to support the deployment of T. drosophilae in the field within the sustainable management techniques against D. suzukii. © 2023 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.  相似文献