Emergency Slaughter Research Articles

Epizootological and epidemiological situation of anthrax in Siberia and the Far East (1985–2023)

Anthrax remains relevant in the world and in the Russian Federation. In Siberia and the Far East, epizootological, epidemiological, environmental and microbiological monitoring of anthrax is constantly carried out. To analyze the epizootological and epidemiological situation of anthrax, we used the information from veterinary institutions and Rospotrebnadzor for 24 regions, as well as reference and archive materials. On the territory of Siberia and the Far East for the period from 1985 to 2023, pronounced epizootological and epidemiological problems of anthrax are observed in the Yamalo-Nenets Autonomous Okrug, the Republic of Buryatia, Omsk Region and the Altai Territory. Over the last five-year observation period, high epizootic activity has been observed in the west of the Republic of Tyva. A total of 3,375 livestock animals and 128 people fell ill. The anthrax database contains information on 7,491 stationary anthrax-infected points in 22 subjects and 562 anthrax burials and cattle burials in 17 subjects of Siberia and the Far East. B. anthracis strains have slight variability in biological properties and belong to two global genetic lines – A and B. In order to prevent anthrax, it is necessary to ensure surveillance of soil foci of anthrax (anthrax burials and cattle burials, “plague fields”), a high level of livestock animals registration and their specific vaccination coverage; to control the implementation of veterinary and sanitary requirements for pre-mortem inspection and emergency slaughter of livestock, the sale of meat and meat products, and biological waste disposal; to carry out explanatory work among the population.

Qualitative welfare risks of cows offered to a Dutch mobile slaughter unit

In the Netherlands, a pilot was initiated of a mobile slaughter unit (MSU) for the killing of cull dairy cattle not fit for transport but suitable for slaughter, in order to save valuable meat. The Office for Risk Assessment & Research (BuRO) was asked to assess the risks for animal welfare. As a thorough risk assessment would have been very time consuming, a qualitative framework was used instead. The goal of the current study was to qualitatively describe the relevant risks for cow welfare involved in the use of an MSU compared with current practice by carrying out a rapid comparative risk assessment of animal welfare. The assessment framework consisted of the following steps: identification and description of scenarios, followed by assessment and comparison of the most relevant animal welfare risks in these scenarios, including hazard identification, hazard characterization, exposure, and characterization of the risk to animal welfare. Two main scenarios were identified, one with and one without an MSU. The second scenario was split into three sub-scenarios: killing on the farm/in a housing unit, emergency slaughter, and conventional transport to the slaughterhouse. The most relevant risks associated with operating an MSU were as follows: leaving the cow alive on the farm when it was not fit for slaughter; forcing the cow to walk to and into the MSU (however, this risk is likely higher under conventional transport of unfit cows); and insufficient stunning and bleeding, leading to questionable unconsciousness (however, this risk is likely higher in an emergency slaughter scenario). The MSU is a means of preventing the exacerbation of welfare deterioration in cows that are unfit for transport but fit for slaughter, and it reduces exposure to stressors (hazards) that are conventionally present during transport and at a stationary slaughterhouse. This rapid comparative risk assessment of animal welfare supported swift decision-making: the national competent authority (i.e., the NVWA in the Netherlands) and policymakers were able to improve and develop risk-mitigating actions and to decide on allowing the use of an MSU. When appropriately designed and used, and with sufficient supervision, mobile slaughter facilities can reduce welfare risks in cull dairy cows that are unfit for transport but fit for slaughter.

Farmers Views on the Implementation of On-Farm Emergency Slaughter for the Management of Acutely Injured Cattle in Ireland.

Four management options for acutely injured cattle in Ireland exist: treatment, unless cattle are severely injured; on-farm emergency slaughter (OFES); casualty slaughter (CS) if the animal is certified fit for transport; or euthanasia. OFES is designed to prevent transport of welfare-compromised cattle. An online survey of farmers in Ireland was carried out between April and July 2021 and focused on events during 2020. A theoretical framework of capacity, willingness, and opportunity was used to explore farmers' perceptions. Responses from 94 farmers (49 dairy and 45 beef) were analysed; not all respondents answered all questions. Respondents indicated that the incidence of acutely injured cattle in Ireland is low. A majority reported not having an acutely injured animal for greater than 36 months. Most respondents had a positive attitude towards OFES for animal welfare reasons and were aware of relevant regulations and guidelines. Barriers to OFES included a lack of availability of OFES, and dairy farmers indicated that it had a similar financial impact as euthanasia. A parallel study with veterinarians indicated a higher incidence of acutely injured cattle in Ireland; the current results may be due to the demographic or the sensitivity of the topic. Nationwide electronic data capture on the cause of mortality could support improvements in the management of acutely injured cattle and enable surveillance of the proportion of these cattle undergoing OFES, euthanasia, or CS.

Occurrence and reasons for on-farm emergency slaughter of cattle in Norway.

On-farm emergency slaughter (OFES) accounts for more than 4% of all cattle slaughter in Norway. The practice raises questions about animal welfare, public health, and the sustainability of cattle production. The objective of this study was to describe the reasons for OFES as stated on the OFES veterinary certificate. Veterinary certificates for OFES for each animal slaughtered in four chosen slaughterhouses from 4 months (January-April-July-October) in 2018 were transcribed into a database. Secondary data were extracted from national cattle databases and used to supplement primary data with information on breed, sex, and birth date. Breeds were divided into dairy and beef cattle. The reasons for slaughter were reported in text on the certificates and were categorized in the study into 5 reasons: recumbency, mammary gland, obstetrics, locomotion, and other, with a total of 20 subcategories for detail. In total, 2,229 forms were included in the study. Thirteen breeds were represented, although dominated by Norwegian Red within dairy and crossbreed within beef. Of the cattle in the study, 46% were slaughtered for locomotion reasons, thereof almost half for lameness. Furthermore, 23% of the cattle in the study were slaughtered for recumbency and 17% for prolapse or dystocia. A higher proportion of dairy cows were slaughtered because of reasons related to mammary glands than beef cows, 10 and 2%, respectively. Almost 30% of beef cows were slaughtered for obstetrics reasons compared to 12% of dairy cows. The results of this study shed light on the reasons for OFES, which is highly relevant to greater discussions of sustainability in cattle production and animal welfare related to on-farm mortality.

Management of acutely injured cattle by on farm emergency slaughter: Survey of veterinarian views.

Fitness to transport is a key provision in animal welfare regulations in the European Union, and for the management of acutely injured cattle. Whilst treatment may be appropriate for some injuries, three common production outcomes for acutely injured cattle are; on farm emergency slaughter (OFES), casualty slaughter (CS) or euthanasia. The aims of this study were to evaluate the perceptions of veterinarians, working in Ireland, on the use of OFES for the management of acutely injured cattle and to evaluate the influence of capacity, willingness and opportunity on their ability to operate OFES. Two online surveys of veterinarians working in Ireland, Private Veterinary Practitioners (PVPs) and Official Veterinarians (OVs), were conducted through QualtricsXM over a 7-week period between April and June of 2021. Quantitative and qualitative questions were developed and analyzed using the tripartite framework of capacity, willingness, and opportunity to collect relevant data about the management of acutely injured cattle and the provision of OFES in Ireland by veterinarians. 43 OVs and 85 PVPs participated in the survey. OVs regulated on average 4.2 abattoirs, of which 21.6% accepted OFES. Participants reported 343 and 377 OFES and CS, respectively, in 2020. 62.4% PVPs had not certified cattle for OFES, or CS. Limb fracture accounted for 79% OFES, 34.5% CS and 47.9% euthanized acutely injured cattle. 63.3% OVs and 44% PVPs were not aware of abattoirs providing OFES within 100 km of their workplace. Lack of availability of OFES negatively associated with PVP knowledge of the procedure. Regulations and guidelines were the most common source of information on OFES for PVPs. Increasing the availability of OFES may help to improve the management of acutely injured cattle, especially those with limb fractures that are unfit for transport.

Hematological, biochemical and histopathological changes in cattle submitted to emergency slaughter

This study aimed to evaluate the effects of stress in bovines submitted to emergency slaughter caused by lengthy transportation to slaughterhouses in the state of Tocantins, Brazil. Blood collections were performed individually during exsanguinations. Tissue samples were obtained after evisceration on the slaughter line. The animals were divided into the Experimental Group (EG), with 19 bovines destined for immediate emergency slaughter, and the Control Group (CG), with 24 bovines slaughtered normally at the abattoir flow. The EG showed lower values of erythrocytes, hemoglobin, hematocrit, platelets, neutrophilia with band neutrophils, and lymphopenia. Hyperalbuminemia, high levels of total proteins, glucose, and creatinine, and lower urea levels were observed in the EG. The globulins were equal between the groups. Histopathology revealed hepatocytes with vacuolated cytoplasm (87.5% of the cases) and liver congestion (83.33%). Interstitial emphysema (95.65%), alveolar emphysema (65.21%), and congestion (52.17%) were observed in the lungs. The kidneys showed congestion (80.95%) and hyaline casts (100%). The spleens showed rarefaction in the white (70%) and red pulp (65%), in addition to hemosiderosis (10%). This suggests that the animals transported over long distances are submitted to severe stress, with water and food deprivation, resulting in hematological and biochemical changes, with histological lesions and serious bruises affecting the musculoskeletal system. There is loss of homeostasis, severe debilitation, with destination for emergency slaughter with the conditional use of meat for consumption.

On Farm Emergency Slaughter and Emergency Killing of Acutely Injured Cattle: Analysis of Guidelines From Five Jurisdictions.

BackgroundIn July 2009, the Farm Animal Welfare Advisory Council (FAWAC) in the Republic of Ireland published Animal Welfare Guidelines for the Management of Acutely Injured Animals on Farm in support of a new Irish regulation designed to permit on-farm emergency slaughter (OFES) of cattle. The purpose of this study was to evaluate the FAWAC guidelines, to determine if they remain fit for purpose by comparing them with five guidelines on the management of acutely injured cattle from four jurisdictions purposively selected because of their relevance to OFES, and to represent geographical and organisational diversity; The United Kingdom, Australia, New Zealand and British Columbia/Canada.MethodologyContent and Thematic Analysis were used to compare the incidence and frequency of themes in the six guidelines using NVIVO 12.ResultsHumane killing and slaughter of animals and the prevention of unnecessary suffering at time of killing were emphasised in all guidelines. Thematic Analysis identified seven primary themes (“parent nodes”): animal welfare; decision tree; certification; legislation; stakeholders; transport and; veterinary ethics. Parent nodes encompassed 26 secondary themes (“child nodes”) including casualty slaughter, on-farm emergency slaughter, euthanasia, unnecessary suffering, animal owner, private veterinary practitioner, official veterinarian and fitness for transport. Guidelines outlined stakeholders' roles in relation to all aspects of managing acutely injured cattle. Results showed similarities between FAWAC, the British Cattle Veterinary Association and the British Columbian/Canadian guidelines in relation to OFES as a method to address acutely injured cattle. OFES is not allowed in Australia or New Zealand as a method of managing acutely injured cattle.ConclusionsAnimal welfare guidelines play a pivotal role in informing all stakeholders involved in the management of acutely injured cattle. Guidelines vary from prescriptive standard operating procedures on actions that should be undertaken for food safety reasons, to descriptive guidance upholding practicalities in relation to equipment and methods to be used in managing acutely injured cattle not meant for human consumption. The FAWAC guidelines remain substantially relevant today and consistent with other welfare guidelines published in the jurisdictions that formed part of the study. However, they need to be reviewed to align with current regulations.

ADOPTION OF IMPROVED MANAGEMENT PRACTICES AMONG ABATTOIR WORKERS IN DUNUKOFIA LOCAL GOVERNMENT AREA OF ANAMBRA STATE, NIGERIA

The study assessed the adoption level of improved management practices among abattoir workers in Dunukofia Local Government Area of Anambra State, Nigeria. Multi-stage sampling technique was used in selecting one hundred and twenty (120) respondents that were used in the study. Data were collected through primary source, using a well-structured questionnaire, and data collected were analyzed using frequency, percentage and mean score. The majority (85%) of the abattoir workers were males, 45% fell between the ages of 31 and 40 years while the majority (70%) of the workers were married. A greater proportion (57.50%) attended primary school education, while 60% had a household size of between 6 and 10 persons with a mean household size of 8 persons. The study revealed that slaughtering of animals (x̅=3.67), emergency slaughter services (x̅=3.67), unloading of animals (x̅=3.46), identification of animals (x̅=3.10), training of butchers (x̅=3.08), rearing of cattle (x̅=2.93) and buying and selling of cattle (x̅=2.63) were the services rendered by the abattoirs in the area. The result shows that the improved management practices adopted by the abattoir workers were safety wears (x̅=3.56), hand washing facilities (x̅=3.25), usage of clean water supply during washing of meat (x̅=2.93), improved state of lairage (x̅=2.72), efficient odor management methods (x̅=2.63), ante-mortem inspection (x̅=2.55), and better heating system (x̅=2.53). Whereas, improper storage of left over carcass (x̅=3.56), improper waste management (x̅=3.23), unclean environment (x̅=3.22), poor welfare of animals (x̅=3.08), careless evisceration (x̅=3.03), usage of tires and plastic materials in flaying animal (x̅=2.93), outbreak of diseases (x̅=2.88), washing of meat with unclean water (x̅=2.83), poor supervisory activities (x̅=2.77), usage of hormones and chemical (x̅=2.77), and unclean equipment and tools (x̅=2.72) were the major unhealthy and unethical management practices that affects meat quality. More so, the result revealed that unbearable taxes and revenue collection (x̅=3.52), unavailability of sewage tank (x̅=3.50), inadequate funds for expansion (x̅=3.30), dissemination of false information about meat on the social media handle (x̅=3.10), and inadequate veterinary personnel (x̅=2.91), etc were the major challenges faced by the workers in the area. Based on the findings of the study, it was recommended that government should ensure enforcement of laws and regular supervision of abattoir activities in the state in other to promote safe and healthy meat for consumption.

Analysis of Veterinary and Sanitary Inspection in Russian Federation Subjects

The paper represents the analysis of the key parameters specifying the food safety system in the Russian Federation as of January 1, 2020. Such issues as competence of the veterinary experts and laboratories in the field of veterinary and sanitary inspection as well as availability of the necessary equipment including equipment for radiometric tests were particularly considered. Implementation of the internal audit procedure by the veterinary and sanitary testing laboratories was assessed. Data on the availability of the slaughterhouses and slaughter units/facilities for emergency slaughter as well as their staffing with the veterinarians are demonstrated. The study results indicate that 39% of the laboratories are not equipped with the necessary laboratory equipment; 8% of the laboratories perform tests using non-calibrated laboratory equipment, and only 2/3 of the laboratories are covered by the regular internal audits. Evidence of insufficient control over the attestation of the veterinarians involved in the veterinary and sanitary expertise was identified. Moreover, insufficient number of slaughter facilities and veterinary and sanitary testing laboratories in the regions of the country was highlighted as well as inadequate staffing of the laboratories with the veterinarians responsible for the official control of the compliance with the veterinary rules and technical regulations and for the veterinary and sanitary inspections. Therefore, in some regions of the country the national veterinary services lack any capacities necessary to perform the emergency slaughter of the diseased and suspect animals in the isolated and controlled environment with the subsequent on-site storage and decontamination of the slaughter products or their disposal or destruction. The study results demonstrate a number of gaps in the veterinary and sanitary inspection system thus indicating the need for corrective actions to be taken both on the federal and local levels.

Sero-diagnostic studies on the occurrence and prevalence of bovine spongiform encephalopathies in Nasarawa state, Nigeria

The study was conducted to determine the occurrence and the prevalence of bovine spongiform encephalopathy among cattle herds in Nasarawa State, Nigeria using targeted sampling approach. The procedure of sampling adapted was a “double” targeted method for survey. First, a BSE risk group was targeted ‘emergency or casualty slaughter’ and within this Group, animals with signs indicative for BSE were sub-targeted. Two sampling locations were chosen; Akwanga central abattoir and Lafia central abattoir, both located in Nasarawa North and Nasarawa south senatorial district. Immediately the suspected animals were slaughtered, the caudal brain stem was harvested and examined for the disease specific form of the prion protein, PrPSc, using Western Blot technique after proteinase K digestion. A total of 2000 cattle of local breeds, aged ≥ 24 months and above were clinically examined. A total of 147 (7.4 %) of the cattle sampled were clinically suspicious for BSE. No sample was positive for BSE. Fluorescent antibody test for rabies and H&E staining on samples were carried out to observe for differential diagnosis. These showed no pathological lesions indicative for neurological disease. While our findings do not exclude the presence of BSE in Nasarawa State, we demonstrate that targeted sampling of ruminants for neuroinfectious disease is possible in developing countries, pointing to the possibility of implementing such a monitoring scheme in Nigeria to prevent economic losses in ruminant livestock as BSE caveats from endemic countries have shown.

On-site veterinary and sanitary examination of emergency slaughtered poultry

The paper reports the veterinary culling rates and emergency slaughter statistics at poultry factories; it also analyses the veterinary and sanitary quality of carcasses of culled poultry in comparison to that of a healthy population. This analysis identifies organoleptic, physical, chemical, and microbiological differences between the two categories of meat. Finally, based on this data, the paper draws recommendations on the most optimal and safe use of meat produced by emergency slaughter.

Evaluation of muscle tissue and liver glycogen of cattle submitted to transport over long distances and subjected to emergency slaughter

ABSTRACT The study evaluated the effect of transportation over long distances on cattle muscle tissue of submitted to emergency slaughter in slaughterhouses in northern Tocantins, Brazil. The evaluations consisted in pH, muscle and liver glycogen, muscle histopathology and creatine kinase (CK), alanine aminotransferase (ALT) and aspartate aminotransferase (AST) activity. Animals were placed into two groups: Experimental Group (EG), consisting of 19 bovines intended for immediate emergency slaughter, and Control Group (CG), composed of 24 bovines slaughtered in accordance with the normal flow. CK and ALT levels were high in EG. AST did not differ between groups. EG showed higher muscle pH and mean of degenerate fibers, mainly on the intercostal. However, muscle and liver glycogen did not differ between groups. In conclusion, cattle transported over long distances and subjected to immediate emergency slaughter showed markedly stress condition, with changes in biochemical parameters in the muscle tissue, determined by cellular degeneration.

Robot milking and relationship with culling rate in dairy cows

Cow routines and behavioral responses are altered substantially following the installation of robot milking. The present study was designed to analyze the effect that switching from milking parlor to automatic milking system (AMS) had on the culling rate (due to various causes) of dairy cattle. For this purpose, culling records and causes for culling were tracked in 23 dairy farms in the Galicia region (NW Spain). The animals in these farms were monitored for 5 years. For the present study, that length of time was divided into three different stages, as follows: 2 years before switching from a milking parlor to AMS (stage 1), the 1st year following the implementation of AMS (stage 2) and the 2nd and 3rd years succeeding the implementation of AMS (stage 3). Cox models for survival analysis were used to estimate the time to culling due to different reasons during stage 1 in relation to stages 2 and 3. The data indicated that the risk of loss due to death or emergency slaughter decreased significantly following the installation of AMS. In contrast, the risk of culling due to low production, udder problems, infertility or lameness increased significantly. Low-production cows (such as cows in advanced lactation due to infertility) or sick cows (such as mastitic or lame cows) allegedly have a noticeable effect both on the performance and the amortization of the cost of AMS, which in turn would lead to a higher probability of elimination than in conventional systems.

Perceptions of on-farm emergency slaughter for dairy cows in British Columbia

Some jurisdictions permit on-farm emergency slaughter (OFES) as one end-of-life option for dairy cows and other animals that cannot be transported humanely but are deemed fit for human consumption. Anecdotal reports suggest that OFES is controversial among dairy industry professionals, but to date their perceptions of OFES have not been studied systematically. Twenty-five individual interviews and 3 focus groups with 40 dairy producers, veterinarians, and other professionals in British Columbia, Canada, revealed positive and negative perceptions of OFES influenced by (1) individual values, (2) the perceived operational legitimacy of OFES, and (3) concern over social responsibility and public perception of the dairy industry. Study participants valued cow welfare but were divided on whether OFES quickened or delayed death for injured animals. Views on the operational legitimacy of OFES varied because of different perceptions and concerns regarding regulatory, veterinary, and meat inspector oversight, a possible conflict of interest for veterinarians, and concerns over carcass hygiene and transport. Whereas many appreciated that OFES prevented transport of compromised cows, others saw OFES as merely a stopgap measure. Seven recommended actions could address concerns while retaining the benefits of OFES: (1) specifying precise timing parameters for OFES, (2) clarification of allowable cow conditions for OFES, (3) consultation with dairy industry professionals if OFES is to be expanded, (4) more proactive culling and the development of euthanasia protocols on farms, (5) the designation of veterinarians as the first point of contact in the OFES process, (6) veterinarian training on animal inspection and allowable conditions for OFES, and (7) the use of proper procedures and equipment during the OFES process to ensure food safety.

Use of on-farm emergency slaughter for dairy cows in British Columbia

On-farm emergency slaughter (OFES), whereby inspection, stunning, and bleeding occur on the farm before the carcass is transported to a slaughterhouse, is permitted in some jurisdictions as a means to avoid inhumane transportation while salvaging meat from injured animals. However, OFES is controversial and its use for dairy cows has been little studied. Inspection documents for 812 dairy cows were examined to identify how OFES was used for dairy cows in British Columbia, Canada, over 16.5 mo. Producers used OFES for dairy cows aged 1 to 13 yr (median of 4 yr). Leg, hip, nerve, spinal, foot, and hind-end injuries or conditions (in that order) were the most common reasons for OFES, and some cases may have been a consequence of calving. Foot conditions were disproportionately common among cows 5 yr and older, and hind-end conditions were disproportionately common among cows 6 yr and older. Producers used OFES promptly after traumatic injury (within 1 d) for some cows, but OFES was delayed for others, sometimes until cows had been nonambulatory for 2 to 6 d. In some cases, OFES was used for nontraumatic chronic conditions, such as lameness and hind-end weakness, rather than traumatic injuries such as fractures and dislocated hips. Use of OFES appears to conform to the purpose of the program when used promptly after traumatic injuries, but clear guidelines are needed to avoid inappropriate use and delays that may prolong animal suffering.

Challenges facing the veterinary profession in Ireland: 3. emergency and casualty slaughter certification

BackgroundVeterinarians are faced with significant conflicts of interest when issuing certificates for the transport and slaughter of acutely injured and casualty livestock. In a recent Policy Delphi study, emergency and casualty slaughter certification was a key concern identified by veterinary professionals in Ireland. In this case study (the third in a series of three resulting from a research workshop exploring challenges facing the veterinary profession in Ireland; the other two case studies investigate clinical veterinary services and the on-farm use of veterinary antimicrobials), we aim to provide a value-based reflection on the constraints and opportunities for best practice in emergency and casualty slaughter certification in Ireland.ResultsUsing a qualitative focus group approach, this study gathered evidence from relevant stakeholders, namely a representative from the regulatory body, local authority veterinarians with research experience in emergency slaughter, an animal welfare research scientist, official veterinarians from the competent authority, a private veterinary practitioner, and a member of a farming organisation. Results revealed a conflict between the responsibility of private veterinary practitioners (PVPs) to safeguard the welfare of acutely injured bovines on-farm and the client’s commercial concerns. As a consequence, some PVPs may feel under pressure to certify, for example, an acutely injured animal for casualty slaughter instead of recommending either on-farm emergency slaughter or disposal by the knackery service. Among Official Veterinarians, there are concerns about the pressure within processing plants to accept acutely injured livestock as casualty animals. Confusion pertaining to legislation and definition of fitness to travel also contribute to these dilemmas.ConclusionsConflicts of interest arise due to the gap between governance and provision to facilitate on-farm emergency slaughter of livestock. Increased availability and acceptance of on-farm emergency slaughter by Food Business Operators (FBOs) would mitigate the need to certify acutely injured animals fit for transport and slaughter and thereby safeguard animal welfare. In the absence of nationwide availability and acceptance of on-farm emergency slaughter by FBOs, consideration should be given to methods to encourage all those involved in the food chain to prioritise animal welfare when in conflict with the commercial value of the animal. Training and guidelines for PVPs on the regulatory landscape and ethical decision-making should become available. The reintroduction of the fallen animal scheme should be considered to support farm animal welfare.

Assessing the time taken for a surveillance system to detect a re-emergence of bovine spongiform encephalopathy in cattle

During the bovine spongiform encephalopathy (BSE) epidemic in July 2001 the European Commission established a surveillance scheme for the comprehensive sampling of all BSE clinical suspects, healthy slaughter (HS) animals >30months, and all emergency slaughter and fallen stock animals tested when >24months. With the exponential decline in classical BSE cases, this comprehensive surveillance system has been successively modified to become risk-based, targeting those exit streams and ages where cases from the original epidemic are most likely to be detected. Such reductions in testing are not without losses in the information subsequently collected, which could affect the sensitivity of the surveillance system to relatively small changes in the underlying prevalence of BSE across the European Union (EU). Here we report on a cohort-based approach to estimate the time taken for EU surveillance to observe a theoretical re-emergence of BSE in cattle. A number of surveillance schemes were compared. The baseline scheme considered detection being triggered by at least one case in the ‘age window’ 48–72 months in the fallen stock or emergency slaughter exit streams. Alternative schemes changed the start and end of this age window as well as considering testing for HS cattle. Under the baseline scheme, an estimated 15 years would lapse ([2.5th, 97.5th] percentiles=[10,24]) prior to detection, during which time 2867 infected animals ([2.5th, 97.5th]=[1722,6967]) would enter the slaughter population. These animals would be predominantly young animals (majority <24months) showing no clinical signs. This baseline scheme reduced the time to detection by 2 years, compared to a scheme where only clinical suspects were tested assuming BSE symptoms are recognised to the same degree by veterinary surgeons. Additional testing of younger animals did not improve detection as young infected animals were unlikely to test positive, but testing of older animals reduced the time to detection. Testing of HS animals >72months reduced the time to detection by one year compared to the baseline model, but would incur a high financial cost, e.g. testing HS animals >72months of age for 14 years would entail approximately 50.4 million additional tests. A limitation of the results is that there is no guarantee that current detection methods, optimised for detection of classical BSE, would identify a novel prion disease in cattle and it is currently difficult to envisage plausible routes by which a re-emergence of classical BSE could occur in Europe.

Assessing circumstances and causes of dairy cow death in Italian dairy farms through a veterinary practice survey (2013–2014)

A questionnaire survey about on farm dairy cow mortality was carried out among veterinary practitioners in Italy between January 2013 and May 2014. The study aimed at investigating the main circumstances of death in dairy cows (euthanasia, emergency slaughter or unassisted death), the primary causes and the risk factors of death. Out of 251 dead cows involved (across 137 farms), 54.6% died assisted and 45.4% were found dead. The main causes of death were metabolic/digestive disorders (22.3%) and mastitis/udder problems (17.1%), while in 14.7% of all cases, reasons of death were unknown. From the univariable generalised linear mixed models, dry cows showed a significantly higher odds to die unassisted compared to lactating cows (OR=3.2); dry cows also had higher odds of dying from unknown reasons (OR=11.7). Season was not significantly related to the risk of dying unassisted and for unknown reasons, but during the summer (characterised by hot and muggy weather in Northern Italy) cows died mostly for problems at calving. 54.2% of cows died during the first 30days in milk (DIM). Half of the multiparous cows that died, died in the first 29.5 DIM, while half of the primiparous cows that died, died in the first 50 DIM. Results pointed out that, especially in dry cows, around calving and during the summer, some failure in management practices and daily inspections may occur. Improvements should be done in monitoring activities and in recognising early symptoms of diseases among stockperson. In addition, in case of diagnosed diseases with poor prognosis, euthanasia procedures should be implemented to prevent cows from dying unassisted.

Growth Plate Lesions of Fattening Bulls.

Lameness related to growth plate lesions is an important problem in the beef industry. This article describes the macroscopic and microscopic lesions in the distal metatarsal physis of bulls from an association of farmers in northeastern Italy. The metatarsal bones of 62 bulls (12 with severe lameness and 50 without lameness), average age 16.44 ± 1.72 months, were examined at the abattoir. The animals came from the same geographic area and shared intensive husbandry practices and a diet based on maize starch. A total of 124 metatarsal bones were sectioned, and the distal metaphyseal growth plate was grossly examined. Twenty-three cases, including 12 lame and 9 nonlame animals with visible lesions on macroscopic examination, and 2 controls (a total of 46 physes) were examined microscopically. Eight of 12 bulls with severe lameness had a chronic purulent physitis in at least 1 limb. Segmental thickening of the hypertrophic zone, consistent with osteochondrosis (OC), was present contralaterally ( n = 3 cases) and bilaterally ( n = 3 cases) in 6 of these animals. In the group of nonlame bulls, 19 of 50 (38%) had similar segmental thickening of the physis consistent with OC. In the remaining bulls, minor findings included partial closure of the physis and a variable degree of metaphyseal hyperemia. A high incidence of OC was found in both lame and nonlame fattening bulls. It is likely that lame animals were clinically more severe due to secondary hematogenous implantation of bacteria, resulting in a purulent physitis and severe lameness that required emergency slaughter in some cases.

Assessing the sensitivity of European surveillance for detecting BSE in cattle according to international standards

European surveillance for Bovine Spongiform Encephalopathy (BSE), initiated in 2001, has shown a steady exponential decline in the number of infected cattle, demonstrating that control measures have been effective. In 2016 23 European countries out of 28 demonstrated negligible risk status for the disease. The international standard setting body, the World Organization for Animal Health (OIE), prescribes that for countries where there is a non-negligible BSE risk, surveillance should allow the detection of one case per 100,000 in the adult cattle population with 95% confidence (Type A surveillance). The Cattle TSE Monitoring Model (C-TSEMM) was developed to estimate the sensitivity of surveillance systems to detect BSE in cattle. The model includes a cohort-based back calculation model to estimate the number and age of infected animals, the subset of those that are detectable by the diagnostic test, and the stream by which infected animals exit the standing population, that is, healthy slaughter, emergency slaughter, fallen stock and clinical suspects. Data collected by the European Commission (EC) and European Food Safety Authority (EFSA), containing the details of over 91 million cattle tested within the European Member States (EU25) surveillance scheme from 2002 to 2011, was used to populate the model.When considering the EU25 surveillance scheme as a single epidemiological unit, the model estimated that the surveillance scheme in place exceeded the OIE required threshold for Type A surveillance, and that a revised monitoring system excluding all healthy slaughter animals would also exceed this threshold.Results indicated a variation in individual country sensitivity of surveillance with seven countries (Germany, Spain, France, Ireland, Italy, Poland and the UK) exceeding the required threshold individually. Key assumptions included the fitting of an exponential distribution for all countries to describe the decline in prevalence over time and, for those members with no detected cases of BSE, an estimated area prevalence was used as a proxy. These results were part of the evidence base that lifted the testing requirement for healthy slaughter animals in European countries in 2013. The model has been maintained and updated by EFSA each year with the addition of new member states, and updated surveillance data.