Human case of bubonic plague resulting from the bite of a wild Gunnison's prairie dog during translocation from a plague‐endemic area

Plague is a zoonotic disease (transmitted mainly by fleas and maintained in nature by rodents) that causes severe acute illness in humans. We present a human plague case who became infected by the bite of a wild Gunnison's prairie dog, and a good practical example of the One Health approach that resulted in a rapid public health response. The exposure occurred while the animal was being transported for relocation to a wildlife refuge after being trapped in a plague enzootic area. This is the first report of a human plague case resulting from the bite of a Gunnison's prairie dog. Additionally, we present an observation of a longer incubation period for plague in captive prairie dogs, leading to a recommendation for a longer quarantine period for prairie dogs during translocation efforts.     

Forest property rights in the frame of public policies and societal change

Property rights over natural resources became a distinct area of inquiry in environmental economics and policy in the last decades, but their role has not yet been investigated thoroughly. Transition countries represent an excellent material of analysis of various policies and institutional developments concerning the regime of use and management of natural resources. The processes of societal transformation had deep impacts on the forestry sector, entailing land reforms and subsequent changes to its institutional and organisational framework. This paper presents an analysis of the reciprocal relationship between the evolving forest property rights and the conduct of policy and economic actors, in connection with their outcomes. The theoretical framework consists of institutional economics, whose core concept is that patterns of interaction between institutions and actors produce physical outcomes, assessable by criteria such as equity and efficiency. The study concentrated on three distinct periods and the applicable property regimes. Within this framework, the impacts of the characteristics of property regimes and the general framework of socio-economic conditions on the exercise of property rights were analysed. The analysis of the conduct of forest owners in relation to the institutional design was completed by the analysis of the other actors influential for land reforms. Romanian forestry sector, in evolution from the period shortly before World War II to present, represents the case of the study. Research data were collected by interviewing/questioning, participant observation and literature review. They were analysed through an integrated method of content analysis and a matrix analysis. An important conclusion is that not only the regime of forest property is determinant for the outcomes of resource use and management, but also the general settings in which they are embedded. Another essential point is that land reforms driven by either efficiency or equity rationales are not mere diversions of the benefit stream, but complex processes with serious implications for the status of the resource at stake.     

Self-Established Black Wattle Populations in Rwanda: Implications for Nature Conservation

Based on empirical evidence from a vegetation survey, this paper investigates the occurrence of self-established populations of black wattle (Acacia mearnsii De Wild.) in various environmental contexts and identifies areas where this species could be allowed to grow as a useful plant. The frequency of occurrence of self-established black wattle was found to be comparatively high above 1600 m of altitude. Three agro-ecological zones of Rwanda (Congo Nile Crest, Non-volcanic Highlands and Central Plateau) account for 70 % of the occurrence, most of which are inside tree plantations and woodlots and natural forests. In areas of most concern to black wattle invasion (especially in proximity of natural ecosystems), the following policy approach should be considered: eradication of current occurrences and a ban on the cultivation of this species. Elsewhere, control through utilization by local communities and adaptive management in areas least vulnerable to its invasion could suffice to keep this species under check.     

Effects of Body Positioning on Swallowing and Esophageal Transit in Healthy Dogs

Background: Contrast videofluoroscopy is the imaging technique of choice for evaluating dysphagic dogs. In people, body position alters the outcome of videofluoroscopic assessment of swallowing.
Hypothesis/Objective: That esophageal transit in dogs, as measured by a barium esophagram, is not affected by body position.
Animals: Healthy dogs ( n = 15).
Methods: Interventional, experimental study. A restraint device was built to facilitate imaging of dogs in sternal recumbancy. Each dog underwent videofluoroscopy during swallowing of liquid barium and barium-soaked kibble in sternal and lateral recumbancy. Timing of swallowing, pharyngeal constriction ratio, esophageal transit time, and number of esophageal peristaltic waves were compared among body positions.
Results: Transit time in the cervical esophagus (cm/s) was significantly delayed when dogs were in lateral recumbency for both liquid (2.58 ± 1.98 versus 7.23 ± 3.11; P = .001) and kibble (4.44 ± 2.02 versus 8.92 ± 4.80; P = .002). In lateral recumbency, 52 ± 22% of liquid and 73 ± 23% of kibble swallows stimulated primary esophageal peristalsis. In sternal recumbency, 77 ± 24% of liquid ( P = .01 versus lateral) and 89 ± 16% of kibble ( P = .01 versus lateral) swallows stimulated primary esophageal peristalsis. Other variables were not significantly different.
Conclusions and Clinical Importance: Lateral body positioning significantly increases cervical esophageal transit time and affects the type of peristaltic wave generated by a swallow.     

Salmonella serotypes present on a sample of Irish pig farms

A survey of the prevalence of Salmonella species infection was conducted on 59 Irish farrow-to-finish pig herds. Faecal samples were collected from the pens of first-stage weaners (growing pigs approximately three to 10 weeks of age), second-stage weaners (approximately 10 to 17 weeks of age) and fatteners, and from the dry sow and farrowing sow houses. The prevalence of infection was estimated to within 5 per cent with a 95 per cent confidence interval. Thirty of the 59 herds were infected, 12 with Salmonella Typhimurium only, eight with Salmonella Derby only and seven with both S Typhimurium and S Derby; serotypes London, Livingstone and Infantis were each isolated from a single herd. Farms in Ireland are assigned to one of three infection categories on the basis of the antibody levels in samples of meat juice taken at slaughter. When a herd was classified as either positive or negative on the basis of the isolation of Salmonella from at least one faecal sample there was no association between the herd's category as determined by meat juice serology and the probability of the isolation of Salmonella from the faecal samples. However, there were differences in prevalence between pigs at different stages of production in herds of different categories. Farrowing sow houses in moderately infected (category 2) herds had significantly lower infection rates (P < or = 0.05) than other herd categories and other stages of production. Pigs from first-stage weaner pens in slightly infected (category 1) herds were more likely to be infected with Salmonella than pigs at any other stage of production or category of herd.     

Path analysis of subsistence farmers' use of veterinary services in Zimbabwe

We used factor and path analyses to identify the causal paths or relationships between variables affecting the demand and use by subsistence farmers of the various services offered by government-employed veterinary livestock technicians (VLTs) in Zimbabwe in 1996. We examined whether the farmer had implemented the VLT-recommended livestock-management procedures. Various factors that have been reported or theorised as important in the demand for veterinary services by subsistence farmers are described. The important factors positively affecting whether farmers had sought veterinary assistance in the last 24 months included familiarity of the farmer with the VLT, if situated closer to the VLT’s base, and if the farmer received further training in agriculture (either through courses or from attendance at demonstrations on animal husbandry conducted by the VLT). Factors affecting whether farmers implemented the recommended management practices that had a monetary cost included familiarity with the VLT, proximity to the VLT’s premises, farmer literacy, club membership, and farmer’s wealth. There was a difference in the paths generated for preventive measures that had a monetary cost versus those measures that involved only a labour or effort costs. For the former practices, the VLT played an important role informing farmers by extension and demonstrations, and farmer’s membership of a club increased their performance.     

Quantitative Trait Loci Associated with Seedling Resistance to Isolates of Puccinia coronata in Oat

ABSTRACT In our previous report, quantitative trait loci (QTL) for field adult plant resistance to crown rust were identified in an oat population of 152 F(5:6) recombinant inbred lines from the cross of 'Ogle' (susceptible)/MAM17-5 (resistant). The objectives of the present study were to identify in the same population, the number, genomic location, and effect of QTL and digenic QTL epistasis associated with greenhouse seedling resistance to isolates of Puccinia coronata to determine if the QTL detected are isolate-specific and to compare them with previously detected QTL for field resistance. Reaction type was scored on greenhouse seedlings inoculated with three isolates. Composite interval mapping was conducted to identify genomic regions associated with resistance using a framework map of 272 molecular markers. Two QTL, Pcq1 and Pcq2, were identified for resistance to each of the three isolates. Pcq1, the major QTL controlling field resistance, did not confer detectable greenhouse seedling resistance when present singly; however, Pcq1 did serve as an enhancer of seedling resistance when it was combined with Pcq2. The final model explained 76.5, 77.9, and 79.3% of total phenotypic variation for resistance to isolates MNB248, MNB249, and MNB251, respectively. Race-specificity of quantitative resistance remains to be further examined.