Gedrag van hennen in/rondom de strooiselbak in welzijnskooien

Onlangs is bij het Praktijkonderzoek Pluimveehouderij de eerste proefronde met alternatieve huisvestingssystemen voor leghennen beëindigd. Eén van de zaken die in deze proef is onderzocht is het inbouwen van een strooiselbak in een kooi

Botsterkte van leghennen

De botsterkte van leghennen wordt door diverse factoren beonvloed. In dit artikel wordt ingegaan op de effecten van huisvesting, verlichting, diergewicht en voer met fytase op de botsterkte

Het gebruik van klembeugels

Bij het uithalen van leghennen wordt wel gebruik gemaakt van zg. klembeugels. Het transporteren van de hennen uit de stal naar de kratten zou met behulp van karretjes met deze klembeugels niet alleen sneller kunnen gebeuren, maar ook zou het aantal botbreuken bij de uitgelegde hennen minder zijn. In een proef op 'Het Spelderholt' is ervaring opgedaan met de klembeugels

Waterrantsoenering bij leghennen

Uit voorlopige resultaten blijkt, dat waterrantsoenering bij leghennen wellicht leidt tot een betere voederconversie en drogere mest, terwijl er geen nadelige invloed is op de eiproduktie

Systeem van de toekomst voor leghennen

Het Praktijkonderzoek Veehouderij wil samen met andere kennisinstellingen de huidige inzichten gebruiken om te komen tot een geheel nieuw houderijsysteem. Uitgangspunt bij dit systeem van de toekomst is dat het op zijn minst moet passen binnen de voorwaarden van duurzame huisvestingssystemen voor leghennen

Gewassen en geoliede eieren verouderen minder snel

In het streven naar een kwalitatief goed ei of eiproduct, dient naast het optimaliseren van het productieproces in de stal ook aandacht te worden besteed aan de handhaving van de kwaliteit gedurende het traject van stal tot consument. Het Praktijkonderzoek Pluimveehouderij (PP) heeft hier onderzoek naar gedaan. Het blijkt, dat gewassen en geoliede eieren minder snel verouderen

Assessment of the conservation priority status of South African estuaries for use in management and water allocation

The future health and productivity of South Africa's approximately 250 estuaries is dependent on two main factors: management and freshwater inputs. Both management and water allocation decisions involve trade-offs between conservation and various types of utilisation. In order to facilitate decision-making in both of these spheres, it is necessary to understand the relative conservation importance of different estuaries. This study devises a method for prioritising South African estuaries on the basis of conservation importance, and presents the results of a ranking based on the collation of existing data for all South African estuaries. Estuaries are scored in terms of their size, type and biogeographical zone, habitats and biota (plants, invertebrates, fish and birds). Thirtythree estuaries are currently under formal protection, but they are not representative of all estuarine biodiversity. We performed a complementarity analysis, incorporating data on abundance where available, to determine the minimum set of estuaries that includes all known species of plants, invertebrates, fishes and birds. In total, 32 estuaries were identified as 'required protected areas', including 10 which are already protected. An estuary's importance status (including 'required protected area' status) will influence the choice of management class and hence freshwater allocation under the country's new Water Act, and can be used to assist the development of a new management strategy for estuaries, which is currently underway. WaterSA Vol.28(2) 2002: 191-20

Pooled analysis of WHO Surgical Safety Checklist use and mortality after emergency laparotomy

Background The World Health Organization (WHO) Surgical Safety Checklist has fostered safe practice for 10 years, yet its place in emergency surgery has not been assessed on a global scale. The aim of this study was to evaluate reported checklist use in emergency settings and examine the relationship with perioperative mortality in patients who had emergency laparotomy. Methods In two multinational cohort studies, adults undergoing emergency laparotomy were compared with those having elective gastrointestinal surgery. Relationships between reported checklist use and mortality were determined using multivariable logistic regression and bootstrapped simulation. Results Of 12 296 patients included from 76 countries, 4843 underwent emergency laparotomy. After adjusting for patient and disease factors, checklist use before emergency laparotomy was more common in countries with a high Human Development Index (HDI) (2455 of 2741, 89.6 per cent) compared with that in countries with a middle (753 of 1242, 60.6 per cent; odds ratio (OR) 0.17, 95 per cent c.i. 0.14 to 0.21, P <0001) or low (363 of 860, 422 per cent; OR 008, 007 to 010, P <0.001) HDI. Checklist use was less common in elective surgery than for emergency laparotomy in high-HDI countries (risk difference -94 (95 per cent c.i. -11.9 to -6.9) per cent; P <0001), but the relationship was reversed in low-HDI countries (+121 (+7.0 to +173) per cent; P <0001). In multivariable models, checklist use was associated with a lower 30-day perioperative mortality (OR 0.60, 0.50 to 073; P <0.001). The greatest absolute benefit was seen for emergency surgery in low- and middle-HDI countries. Conclusion Checklist use in emergency laparotomy was associated with a significantly lower perioperative mortality rate. Checklist use in low-HDI countries was half that in high-HDI countries.Peer reviewe

Global variation in anastomosis and end colostomy formation following left-sided colorectal resection

Background End colostomy rates following colorectal resection vary across institutions in high-income settings, being influenced by patient, disease, surgeon and system factors. This study aimed to assess global variation in end colostomy rates after left-sided colorectal resection. Methods This study comprised an analysis of GlobalSurg-1 and -2 international, prospective, observational cohort studies (2014, 2016), including consecutive adult patients undergoing elective or emergency left-sided colorectal resection within discrete 2-week windows. Countries were grouped into high-, middle- and low-income tertiles according to the United Nations Human Development Index (HDI). Factors associated with colostomy formation versus primary anastomosis were explored using a multilevel, multivariable logistic regression model. Results In total, 1635 patients from 242 hospitals in 57 countries undergoing left-sided colorectal resection were included: 113 (6·9 per cent) from low-HDI, 254 (15·5 per cent) from middle-HDI and 1268 (77·6 per cent) from high-HDI countries. There was a higher proportion of patients with perforated disease (57·5, 40·9 and 35·4 per cent; P < 0·001) and subsequent use of end colostomy (52·2, 24·8 and 18·9 per cent; P < 0·001) in low- compared with middle- and high-HDI settings. The association with colostomy use in low-HDI settings persisted (odds ratio (OR) 3·20, 95 per cent c.i. 1·35 to 7·57; P = 0·008) after risk adjustment for malignant disease (OR 2·34, 1·65 to 3·32; P < 0·001), emergency surgery (OR 4·08, 2·73 to 6·10; P < 0·001), time to operation at least 48 h (OR 1·99, 1·28 to 3·09; P = 0·002) and disease perforation (OR 4·00, 2·81 to 5·69; P < 0·001). Conclusion Global differences existed in the proportion of patients receiving end stomas after left-sided colorectal resection based on income, which went beyond case mix alone

Strooiselverstrekking in verrijkte kooien

De nieuwe EU-richtlijn voor het houden van leghennen stelt strooisel in verrijkte kooien op termijn verplicht. Hoewel er voldoende technieken zijn om dit te kunnen realiseren, blijkt de keuze van de juiste technieken en materialen van groot belang. Indit artikel de laatste stand van zaken