1997-32 Numéro spécial Thèmes 8 à 14 - Special issue Thema 8 to 14

Godfroid (J), Walravens (K), Desmecht (M), Boelaert (F), Czaplicki (G), Viatour (P), Dufey (J), Weynants (V), Letesson (J-J) & Nduwamahoro (E), Traoré (H) & Portaels (F)

A case-control study on risk factors for bovine brucellosis in the Veneto region (Italy)

Dalla Pozza (M), Martini (M), Marangon (S), Manca (G) & Ricci (A)

Frequency of clinical listeriosis in dairy cattle in England

Erdogan (H-M), Cetinkaya (B), Green (L-E), Cripps (P-J) & Morgan (K-L)

Restriction fragment length polymorphism with the probe IS900 in Mycobacterium paratuberculosis

Pavlík (I), Horváthová (A), Bartl (J) & Rychlík (I)

Modelling the effect of maternal targeted culling strategies on the future course of the BSE epidemic in British dairy herds

Tsutsui (T), Short (N) & Medley (G)

Case study of BSE in animals born after the feed ban (BAB) in Switzerland

Hornlimann (B), Audigé (L), Somaini (B), Guidon (D) & Griot (C)

Age-specific seroprevalence of Neospora species infections in cattle on selected British dairy farms

Davison (H-C), Dannatt (L-C), Guy (F), Roberts (J), McGarry (J), Otter (A), Williams (D-J-L) & Trees (A-J)

Risk factors associated with toxoplasmosis on New York State: An exploratory analysis of clinical data

Were (S-R), Bowman (D-D) & Mohammed (H-O)

Predicting the chance of BVD positive cultures on calves submitted for necropsy in The Netherlands

Loeffler (S-H), Akkermans (J-P), Stins (P-G), Zimmer (G) & Wentink (G-H)

Infectious bovine rhinotracheitis (IBR): Serological survey on dairy herds in Lombardia region

Zanardi (G), Tranquillo (V-M), Frankena (K), Cordioli (P), Sala (G), Belloli (A), Sala (L) & Brugola (L)

Some epidemiological characteristics of bovine herpesvirus 1 (BHV1) infections as determined by bulk-milk testing of all Dutch dairy herds

Van Wuijckhuise (L), Bosch (J), Franken (P), De Wit (J), Frankena (K) & Elbers (A)

African swine fever occurrence and seropositivity to ASF virus in swine herds in Sardinia

Mannelli (A), Sotgia (S), Patta (C), Carboni (A), Cattina (A), Cossu (P), Firinu (A), Madrau (P), Oggiano (A), Sanna (L), Sarria (A) & Laddomada (A)

Freedom from infection: a stochastic simulation model for evaluating the efficacy of national or regional surveys applied to PRRS in Switzerland

Audigé (L), Beckett (S), Canon (N), Hofmann (M) & Griot (C)

Persistent bovine viral diarrhoea virus infection in U.S. beef herds

Wittum (T), Groteluschen (D), Brock (K), Kvasnicka (W), Floyd (J) & Odde (K)

Analyse rétrospective des causes d'origine et de développement de la fièvre aphteuse sur le territoire de l'ancienne URSS dans la période 1961-1996

Zakharov (V-M), Baibikov (T-Z) & Rakhmanov (A-M)

AFFICHES - POSTERS

Fièvre charbonneuse des animaux agricoles et sauvages et mesures de prophylaxie en Russie

Bakoulov (I-A)

Antigenic variability of fimbrial adhesins of E. coli epizootic strains

Golovko (A-N)

Factors associated with bovine leukaemia virus infection in seasonally calved dairy herds in New Zealand

Hayes (D), Pfeiffer (D), Morris (R), Burton (L), Reichel (M) & Hoggard (G)

Surveillance of foot and mouth disease in the province of Cordoba, Argentina, a retrospective study: Estimation of prevalence and risk factors

Larriestra (A), Sanchez (J) & Piscitelli (H)

Prevalence of antibodies to caprine arthritis-encephalitis virus in breeding goats in Poland

Kaba (J), Ganter (M), Bickhardt (K) & Prandota (J)

First results of a field trial using BHV-1 marker vaccines against bovine herpes virus 1 (BHG-1) in cattle herds

Schlüter (H), Teuffert (J), Pannwitz (S), Geue (A) & Petrov (P)

Epidemiology of vesicular stomatitis in Colorado, U.S.A. - Survival and persistence of the disease

Traub-Dargatz (J), Salman (M), Mumford (E), McCluskey (B) & Schmitt (B)

Sero-epidemiological study of Newcastle disease in Switzerland

Schelling (E), Audigé (L), Hoffmann (M), Thür (B), Gohm (D) & Griot (C)

Prevalence and herd-level risk factors of bovine brucellosis in family agriculture systems in central Chile

Rojas (H) & Otte (J)

A study of the seroprevalence of bovine herpesvirus 1 infection in the Walloon region of Belgium

Lemaire (M), de Wergifosse (B), Nols (L), Limbourg (B), Deblicquy (P), Onclin (M), Czaplicky (G), Bughin (J), Antoine (H) & Wellemans (G), Pastoret (P-P), Thiry (E)

L'utilisation de la technique immuno-enzymatique dans le programme de la surveillance épidémiologique de la peste équine en Algérie

Menouer (M), Boudilmi (B), Mellor (P-S), Hamblin (C), Lokbani (I) & Bouayed (N)

Contrasting pre-intervention bulk milk BVD antibody titres from dairy herds in Kalmar, Sweden, (1992) and Northern Scotland (1996)

Gunn (G), Lindberg (A), Nettleton (P) & Alenius (S)

12 - LES OUTILS EN EPIDEMIOLOGIE - TOOLS IN EPIDEMIOLOGY

COMMUNICATIONS ORALES – ORAL COMMUNICATIONS

Proving freedom from disease using imperfect tests: the freecalc sample size calculator and survey analysis program

Cameron (A-R) & Baldock (F-C)

Un outil paramétrique de classification qui peut estimer simultanément sensibilité, spécificité et prévalence : La distribution mixte

Bigras-Poulin (M)

Dependency between sensitivity, specificity and prevalence analysed by means of Gibbs sampling

Chriel (M) & Willeberg (P)

Modelling the detection delay of a tuberculosis outbreak based on the slaughter inspection compared with the tuberculin testing of the cows

Ducrot (C), Peretz (G) & Boisseleau (D)

Evaluation of an ELISA for monitoring parasite burdens in dairy herds

Dohoo (I), Caldwell (V), Markham (F), Conboy (G), Bouchard (E) & DesCoteaux (L)

A method to determine cut-off values in milk somatic cell counts to characterize udder health of dairy cows using test day results

Beaudeau (F), Hortet (P), Fourichon (C) & Seegers (H)

Evaluation of clinical mastitis and somatic cell count as diagnostic tests for surveillance of udder health in dairy herds

Agger (J-F), Bartlett (P-C), Woudstra (I), Willeberg (P), Houe (H), Lawson (L) & Enøe (C)

Questionnaire translation as a source of data error - An example from the Philippines

Lee (J-A), More (S) & Cotiw-An (B)

How good are data from questionnaires: a review of measuring reliability?

Slater (M)

Linking GIS with economic models for managing livestock health: possibilities and constraints

Harrison (S-R), Sharma (P-C) & Tisdell (C-A)

A spatially predictive logistic regression model for occurrence of theileriosis outbreaks in Zimbabwe

Pfeiffer (D-U), Duchateau (L), Kruska (R-L), Ushewokunze-Obatolu (U) & Perry (B-D)

A GIS-based computer program for the region wide eradication of enzootic pneumonia (EP)

Laube (P), Stärk (K-D-C) & Keller (H)

Geographical information systems for integrating air pollution modelling with outcomes and confounders: effects of sour gas processing plant emissions on the health and productivity of cattle

Scott (H-M), Ellahoj (E), Wilson (D-J), Martin (S-W), Soskolne (C-L), Coppock (R-W), Guidotti (T-L), Hrudey (S-E) & Lissemore (K-D)

Implementation of a veterinary geographical information system in the Abruzzi region

Giovannini (A), Battistini (M-L), Weiss (C) & Caporale (V)

Agribase - A national spatial farm database

Sanson (R) & Pearson (A)

Application of quantitative methods and molecular biological techniques to investigation of the spread of Aujesky's disease virus

Weigel (R-M), Scherba (G), Wiemers (J), Siegel (A-M), Austin (C-C), Jin (L), Bowman (L) & Johnston (N-A)

Complex typing of Salmonella enteritidis and Salmonella typhimurium as a tool for the epidemiological surveillance of salmonellosis from 1976-1996 in Germany

Rabsch (W)

Molecular genetic tools for epidemiologic studies of Mycobacterium bovis infection

Salman (M-D), Triantis (J), Ellis (R-P), Black (W-C) & Magnuson (R-J)

Application of PCR in heartwater epidemiology

Peter (T), O'Callaghan (C), Perry (B), Medley (G) & Mahan (S)

An experimental infection with a classical swine fever virus on weaner pigs. Can the serological data be used to estimate the day of virus introduction in natural outbreaks?

Laevens (H), Deluyker (H), Van Caenegem (G), Vermeersch (J-P) & Koenen (F)

ATCvet - A classification system for veterinary medicinal products based on the human classification system ATC

Janzon (U)

Proposal and economic evaluation of a new approach to sanitary decision in eradication of contagious bovine pleuropneumonia

NizaRibeiro (J), Regalla (J), Gonçalves (R), Vaz (Y) & Duarte (L)

Elicitation of expert knowledge on risk factors for classical swine fever transmission in Switzerland

Stärk (K-D-C), Horst (H-S), Morris (R-S) & Teuffert (J)

Ex ante impact assessment of disease control technologies: the case of vector-borne infections in Africa

Perry (B), Kruska (R), Medley (G), Mukhebi (A), O'Callaghan (C), Peter (T), Reid (R) & Williams (T)

AFFICHES - POSTERS

Control of classical swine fever: combined testing of serum samples for antigen and antibody yields optimal detection

Bruderer (U), Depner (K-R), Plagemann (R), Bogner (K), Böttcher (J), Schalch (L) & Bommeli (W)

« EPIBASE », un système d'information épidémiologique multi-espèces multi-langues sous 'Windows 95' et 'Access 2.0'

Barnouin (J), Dorr (N), Pichenot (P) & Chassagne (M)

Surveillance en temps réel de la truie en élevage intensif

Klopfenstein (C), Bigras-Poulin (M) & Martineau (G-P)

Veterinary epidemiology and modern information technology

Pfeiffer (D-U) & Morris (R-S)

The use of field data for building an expert system for the control of respiratory diseases in pigs

Stärk (K-D-C), Pfeiffer (D-U) & Morris (R-S)

Development and evaluation of an animal health data recording system in Swiss dairy farms

Krebs (S), Audigé (L) & Danuser (J)

Quality assessment of California mastitis test as a diagnostic tool in quarter somatic cell count estimation

Casura (C), Schukken (Y-H) & Rüsch (P)

The influence of two different 'intermittent' drying off strategies on the prevalence of mastitis in a dairy herd and the efficiency at which the RMS and EC are able to identify the subclinical infections

Douglas (V-L), Pfeiffer (D-U), Williamson (N-B), Holmes (C-W) & Steffert (I-J)

The use of acute phase proteins and other clinical laboratory indices for the detection of cattle with acute disease

Knox (K-M-G), Horadagoda (N-U), Gibbs (H-A), Eckersall (P-D), Fitzpatrick (J-L) & Reid (S-W-J)

Differentiating Brucella melitensis vaccine strain REV. I and field strains, using polymerase chain reaction

Guler (L), Triantis (J), Bricker (B-J) & Salman (M-D)

Estimation of the sensitivity and specificity of two diagnostic test for the detection of antibodies against Actinobacillus pleuropneumoniae serotype 2 in pigs by maximum-likelihood-estimation and Gibbs-sampling

Enøe (C), Andersen (S), Thomsen (L-K), Mousing (J), Leontides (L), Sørenson (V) & Willeberg (P)

Integrating a geographic information system with animal health management

McGinn (T-J), Cowen (P) & Wray (D-W)

Determination of diagnostic parameters of complement fixation test (CFT) for serological diagnosis of Mycoplasma mycoides susubsp. mycoides (small colony) infection during an outbreak in Botswana

Majok (A-A), Masupu (K-V) & Amanfu (W)

Serological patterns of false positive reaction in bovine brucellosis in Saône-et-Loire (France)

Lescoat (P), Pouillot (R), Sanaa (M), Repiquet (D), Gerbier (G), Bénet (J-J) & Garin-Bastuji (B)

Bovine brucellosis diagnosis by skin test: Line up of use conditions and evaluation of performances

Saegerman (C), Limet (J-N), Vo (T-K-O), De Waele (L), Gilson (D), Bastin (A), Dubray (G), Godfroid (J) & Letesson (J-J)

Detection of antibodies against 3D protein of foot and mouth disease virus by a liquid phase blocking sandwich ELISA

O'Donnell (V), Smitsaart (E), Boyle (D), Duffy (S), Cetra (B-N), Fondevilla (N) & Schudel (A-A)

RAPD and DNA/DNA hybridization studies in clinical and foodborne Listeria monocytogenes strains, serovar 4B

Wagner (M), Lehner (M) & Brandl (E)

PCR-single strand conformation polymorphism in Aeromonas and Listeria species as a tool for epidemiological surveys

Lehner (A), Wagner (M), Loncarevic (S) & Brandl (E)

Evaluation of a polyclonal blocking ELISA and a complement fixation test detecting antibodies to Actinobacillus pleuropneumoniae serotype 2 in pig serum

Sørensen (V), Barfod (K), Feld (N-C), Nielsen (J-P), Enøe (C) & Willeberg (P)

Implementation of a geographical information system for epidemic emergencies

Battistini (M-L), Bellini (S), Giovannini (A) & Caporale (V)

Application of a geographical information system to the epidemiological surveillance of notifiable diseases

Battistini (ML), Giovannini (A), Tamba (M) & Caporale (V)

Evaluation du RAPD (random amplification of polymorphic DNA) comme outil pour l'épidémiosurveillance de la listériose, effectuée par le Centre national de référence des Listeria

Jacquet (C), Catimel (B), Veit (P) & Rocourt (J)

13 – METHODES STATISTIQUES ET MODELISATION – STATISTICAL METHODS AND MODELLING

COMMUNICATIONS ORALES – ORAL COMMUNICATIONS

A structured approach for analysing survey data and making useful causal inferences

Martin (W)

Epidemiological considerations related to within herd multivariable modelling in herd health management

Enevoldsen (C)

An approach to meta-analysis: Post-partum GnRH and the reproductive performance of dairy cows

Beckett (S)

The use of the canonical correspondence analysis in epidemiology

Faye (B), Lescourret (F) & Tillard (E)

Decentred correspondence analysis: A method for analysing a multivariate table of proportions

Tillard (E), Faye (B), Desoutter (D), Chessel (D) & Thioulouse (J)

Robustness of multistage sampling designs for estimation of protection levels against livestock disease

Harrison (S) & Cameron (A)

Effect of different sampling techniques on odds ratio estimates using hospital-based cases and controls

Doherr (M-G), Carpenter (T-E), Wilson (W-D) & Gardner (I-A)

Use of the case-crossover design in veterinary epidemiology: Application to fatal skeletal injuries of racehorses

Gardner (I), Estberg (L) & Stover (S)

An epidemiological and economic simulation model to evaluate the spread and control of infectious bovine rhinotracheitis in dairy cattle

Vonk Noordegraaf (A), Buijtels (J-A-A-M), Dijkhuizen (A-A), Franken (P), Stegeman (J-A) & Verhoeff (J)

Genetic algorithm to include herd level effects in optimising individual animal decisions

Smeding (T), Jalvingh (A-W) & Dijkhuizen (A-A)

Some illustrations of the use of statistical process control techniques in monitoring dairy herd performance

De Vries (A), Conlin (B), Reneau (J), Kinsel (M) & Marsh (W)

Testing the effect of interventions on transmission in animal experiments at laboratory scale

De Jong (M-C-M) & Kroese (A-H)

Theoretical basis for the reduction of the risk of farm-to-farm transmission

De Jong (M-C-M), Diekmann (O) & Metz (J-A-J)

Modelling the transmission dynamics of Cowdria ruminantium: Supporting the case for endemic stability

O'Callaghan (C), Medley (G), Peter (T) & Perry (B)

Modélisation de la propagation de la fièvre aphteuse en fonction de la taille et de la répartition spatiale des cheptels

Gerbier (G), Chadœuf (J), Durand (B) & Moutou (F)

A model of Warble fly infestation (hypodermosis) in space and time

French (N-P)

Dynamics of two retroviruses within a population of cats

Courchamp (F), Suppo (C), Fromont (E) & Bouloux (C)

Generalized linear mixed models applied to large-scale Salmonella data for Danish broiler flocks

Chriél (M), Stryhn (H) & Dauphin (G)

Causal modelling with and without random effects - An example from a deer herd health and productivity profiling study

Audigé (L), Pfeiffer (D-U), Morris (R-S) & Wilson (P-R)

Modélisation de l'occurrence des mammites cliniques au sein d'un troupeau : Analyse de la sur-dispersion

Gasqui (P) & Coulon (J-B)

Application of frailty models in multivariate survival data: The risk of Cryptosporidium in dairy cattle

Mohammed (H-O) & Wade (S-E)

Experiences in applying multi-level models for assessing the distribution of animal diseases

McDermott (J), O'Callaghan (C) & Kadohira (M)

Epidemiological studies of sub-acute recurrent diseases with time dependent covariates - A method of analysis for longitudinal studies using equine lower airway disease as an example

Wood (J-L-N), Newton (J-R), Chanter (N), Townsend (H-G-G), Lakhani (K-H) & Mumford (J-A)

Design and evaluation of field studies on subclinical mastitis dealing with interdependence among quarters of the bovine udder

Barkema (H-W), Schukken (Y-H) & Lam (T-J-G-M)

Multi-level modelling of quarter infection data. Estimation of variance components and effects

Schukken (Y-H), McDermott (J-J), Lam (T-J-G-M) & Valkengoed (P)

Comparison of three multilevel programs for binary outcome: Leptospirosis in horses

Belue (R), Barwick (R) & Mohammed (H-O)

AFFICHES - POSTERS

Listeria monocytogenes in silage: A mathematical modelling approach

Kelly (L), Gettinby (G), Gibson (G), Low (J-C) & Donachie (W)

Simulation of the risk of the airborne spread of foot-and-mouth disease virus from a high security laboratory release

De Manuel León (A), Casal (J), Gómez-Tejedor (C) & Sánchez-Vizcaíno (J-M)

Simulation of the evolution of porcine reproductive and respiratory syndrome infection in endemic farms

Casal (J), Mateu (E) & Martín (M)

Modelling and control of the infection processes in industrial pig breeding

Klestova (Z-E) & Makarenko (A-S)

Mise à l'épreuve d'un modèle prédictif de l'occurrence des mammites cliniques chez la vache

Pérochon (L), Coulon (J-B), Aujas (C) & Troccon (J-L)

Fundamental sampling and statistical considerations for epidemiological studies

Lakhani (K-H) & Wood (J-L-N)

Vaccination and sterilization programs for rabies control within an increasing fox population

Suppo (C), Langlais (M) & Artois (M)

14 – EPIDEMIOLOGIE EN MILIEU AQUATIQUE – AQUATIC EPIDEMIOLOGY

COMMUNICATIONS ORALES – ORAL COMMUNICATIONS

A prospective study of infectious pancreatic necrosis in farmed Atlantic salmon post-smolt

Jarp (J) & Melby (H)

A salmon information system and its use to study the epidemiology of pancreas disease

Wheatley (S), Crockford (T), McLoughlin (M), Menzies (F) & Goodall (E)

Epidemiological survey of the brown ring disease in clams of Atlantic coast: Role of temperature in variations of prevalence

Paillard (C), Maes (P), Mazurié (J), Claude (S), Marhic (A) & Le Pennec (M)

Epidemiology of the salmonid fish pathogen Flavobacterium psychrophilum: Outcome of molecular investigations

Chakroun (C), Bernardet (J-F), Grimont (F), Faure (D) & Urdaci (M)

Introduction of Gyrodactylus salaris to the river Tana: A quantitative risk analysis

Paisley (L), Karlsen (E), Jarp (J) & Mo (T)

Oncorhynchus masou virus (OMV) epidemiology and control system

Yoshimizu (M) & Kimura (T)

AFFICHES - POSTERS

Un réseau d’épidémiosurveillance des poissons sauvages, pourquoi pas ?

Girard (P)

Epidemiological survey for bivalve mollusc’s diseases in France

Thébault (A), Berthe (F) & Renault (T)

Report of transmissible disease outbreaks in wild fish in the province of Cordoba, Argentina

Mancini (M) & Larriestra (A)

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1997-32 Numéro spécial Thèmes 8 à 14 - Special issue Thema 8 to 14