首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献，搜索用时 234 毫秒
1.
  相似文献   

2.
OBJECTIVE: To estimate the relative risk of injury among horses deemed to be at increased risk of injury on the basis of prerace physical inspection findings and to examine the association of injury during races with race-related characteristics. DESIGN: Cohort study. ANIMALS: 2,187 Thoroughbred horses that started 3,227 races in Kentucky. PROCEDURE: All race starts for which a horse was deemed to be at increased risk of injury on the basis of prerace physical inspection findings and a random sample of race starts for which horses were not deemed at increased risk of injury were included in the study. Findings of prerace physical inspection, race-related characteristics, and outcome of the race (race results and whether the horse incurred an injury) were recorded for each race start. Race starts in which a horse incurred an injury during a race were compared with race starts in which injuries were not incurred to identify factors associated with injury during races. RESULTS: Abnormality of the suspensory ligament of the forelimbs detected during prerace physical inspection, racetrack, class of race (claiming race < or = $25,000 vs other classes), and distance of race (< 7 furlongs vs other distances) were significantly associated with increased risk of injury. CONCLUSIONS AND CLINICAL RELEVANCE: Prerace physical inspection findings, particularly abnormalities of the suspensory ligament, may be used to identify horses at increased risk of injury during races. Rate of injury differed among racetracks, and horses in certain types of races (lower-priced claiming races and races of shorter distance) may be at increased risk of injury during races.  相似文献   

3.
OBJECTIVE: To determine the frequency and anatomic location of musculoskeletal injuries incurred by Quarter Horses during races and to compare data from injured horses and matched control horses. DESIGN: Matched case-control study. ANIMALS: 97 Quarter Horses that sustained a musculoskeletal injury during races and 291 horses from the same races that were not injured. PROCEDURE: Data examined included racing history, race-entrant characteristics, racing events determined by analysis of videotapes of races, and, when performed, results of prerace physical inspections. Data for injured horses were compared with data for control horses, using conditional logistic regression. RESULTS: Incidence of a catastrophic injury among Quarter Horses during races was approximately 0.8/1,000 race starts, whereas incidence of musculoskeletal injury during racing was approximately 2.2/1,000 race starts. Odds of musculoskeletal injury were approximately 8 times greater among horses assessed to be at increased risk of injury on the basis of results of prerace physical inspection than for horses not considered to be at increased risk of injury. Evidence was lacking that 2-year-old horses were at increased risk of injury or that sex influenced the risk of injury among Quarter Horses during races. CONCLUSIONS AND CLINICAL RELEVANCE: Incidence of racing injury among Quarter Horses appears to be lower than that observed among Thoroughbreds. Regulatory veterinarians can identify horses at increased risk of injury on the basis of prerace physical inspection, indicating that these inspections could be used to reduce the risk of injury during races.  相似文献   

4.
Reasons for performing study: Previous studies suggest that owners underestimate or incorrectly recognise or report health problems in geriatric horses. However, few studies have directly compared owner‐reported and veterinary assessed disease. Objectives: To compare the findings of veterinary clinical examination of geriatric horses with owner‐reported clinical signs and disease. Methods: A total of 200 horses aged ≥15 years were randomly selected to receive a veterinary examination, from responses to a cross‐sectional postal questionnaire survey. Veterinary examinations were performed within 2 months of questionnaire return, and agreement between owner‐reported data and veterinary clinical findings was assessed. Results: Owners under‐reported many clinical signs and disease conditions detected on veterinary clinical examination. For example, dental abnormalities (detected in 95.4% of horses, reported by 24.5% of owners); cardiac murmurs (detected in 20% of horses, reported by 0.5% of owners); lameness (present in 50% of horses, reported by 23% of owners) and hoof abnormalities (detected in 80% of horses, reported by 27% of owners). Agreement between owner‐reported and veterinary assessed respiratory disease (Kappa 0.02–0.2), body condition score (Kappa 0.24) and coat abnormalities (Kappa 0.42) was poor, fair and moderate, respectively. Range of motion (ROM) of the tarsal and metacarpophalangeal joints was lower in horses with owner‐reported osteoarthritis (P = 0.005 and <0.001, respectively). Conclusions and potential relevance: The low prevalence and relatively poor agreement of owner‐reported disease compared to that detected on veterinary examination suggests inaccurate or under‐recognition, or inaccurate reporting of health problems by owners of geriatric horses, which could lead to a delay in presentation for veterinary treatment. Increased veterinary involvement and improved owner education in the care of geriatric horses should facilitate earlier identification of disease, particularly that which is not readily detectable by owners, and aid management of health and welfare problems.  相似文献   

5.
Records of horses admitted to a veterinary surgery in the UK for lameness investigation during 2000 to 2008 were reviewed. Twenty-one horses were identified with both scintigraphic and radiological evidence of enostosis-like lesions (ELLs), in which 68 individual foci of increased radiopharmaceutical uptake were confirmed in 57 long bones. The presenting lameness was attributed to ELLs in 15 of 21 (71 per cent) horses; the remainder were thought to be incidental findings. Five horses were subjected to a repeat examination, four of which showed the occurrence of new lesions in the same or different limbs. Hindlimbs had significantly more lesions than forelimbs, but there was no difference between the right and left limbs. All 18 horses for which follow-up information was available were treated conservatively and returned to soundness after a variable period of time. Following ELL resolution, thoroughbred horses performed at a similar level to that before investigation and diagnosis.  相似文献   

6.
OBJECTIVE: To compare efficacy and safety of paste formulations of firocoxib and phenylbutazone in horses with naturally occurring osteoarthritis. DESIGN: Randomized controlled clinical trial. ANIMALS: 253 client-owned horses with naturally occurring osteoarthritis. PROCEDURES: Horses were treated with firocoxib (0.1 mg/kg [0.045 mg/lb], PO, q 24 h) or phenylbutazone (4.4 mg/kg [2 mg/lb], PO, q 24 h) for 14 days. Physical examinations and lameness evaluations were performed prior to treatment and after 7 and 14 days. Clinical improvement was defined as a reduction of at least 1 lameness grade or a combined reduction of at least 3 points in scores for pain during manipulation or palpation, joint swelling, joint circumference, and range of motion. RESULTS: Proportion of horses clinically improved on day 14 for the firocoxib group (104/123 [84.6%]) was not significantly different from the proportion for the phenylbutazone group (103/119 [86.6%]). Proportion of horses that were improved on day 14 was significantly greater for horses treated with firocoxib than for horses treated with phenylbutazone with regard to score for pain on manipulation or palpation (P = 0.028), joint circumference score (P = 0.026), and range of motion score (P = 0.012), but not for overall lameness score or joint swelling score. No direct treatment-related adverse effects were detected during the study. CONCLUSIONS AND CLINICAL RELEVANCE: Results suggested that overall clinical efficacy of a paste formulation of firocoxib in horses with naturally occurring osteoarthritis was comparable to efficacy of a paste formulation of phenylbutazone.  相似文献   

7.
REASONS FOR PERFORMING STUDY: Determining the risk of fatality of Thoroughbred horses while racing is essential to assess the impact of intervention measures designed to minimise such fatalities. OBJECTIVES: To measure the risk of racehorse fatality in jump and flat starts on racecourses in Victoria, Australia, over a 15 year period and to determine proportional mortality rates for specific causes of death. METHODS: All fatalities of Thoroughbred horses that occurred during or within 24 h of a race were identified from a database. The risk of a start resulting in a racehorse fatality in all races and within flat and jump races, proportional mortality rates, population attributable risk, population attributable fraction and risk ratios were calculated along with 95% confidence intervals. Poisson regression was also performed to estimate risk ratios. RESULTS: There were 514 fatalities over the 15 year period; 316 in flat races and 198 in jump races. The risk of fatality was 0.44 per 1000 flat starts and 8.3 per 1000 jump starts (18.9 x greater). The risk of fatality on city tracks was 1.1 per 1000 starts whereas on country tracks it was 0.57 per 1000 starts. Of the 316 fatalities in flat races, 73.4% were due to limb injury, 2.5% to cranial or vertebral injury and 19.0% were sudden deaths. Of the 198 fatalities in jump races, 68.7% were due to limb injury, 16.2% to cranial or vertebral injury and 3.5% were sudden deaths. The risk of fatality in flat starts increased between 1989 and 2004 but the risk in jump starts remained unchanged over the 15 year period. CONCLUSIONS: The risk of fatality in flat starts was lower in Victoria than North America and the UK but the risk in jump starts was greater. Catastrophic limb injury was the major reason for racehorse fatality in Victoria but there was a larger percentage of sudden deaths than has been reported overseas. The risk of fatality in jump starts remained constant over the study period despite jump racing reviews that recommended changes to hurdle and steeple races to improve safety. POTENTIAL RELEVANCE: This study provides important benchmarks for the racing industry to monitor racetrack fatalities and evaluate intervention strategies.  相似文献   

8.
Reasons for performing study: To describe the clinical symptoms, treatment, and outcome of meniscal cysts in horses. These structures have not been previously described in the literature as a potential cause of lameness in the horse. Hypothesis: Meniscal cysts are an uncommon condition of the femorotibial joint but can be a significant cause of lameness. Symptoms can be resolved by arthroscopic excision. Methods: Records of horses diagnosed with meniscal cysts and treated by cyst excision and meniscal debridement at 2 surgical practices were reviewed. Clinical outcome was determined by repeat veterinary examination and contact with owner. Results: Seven cases of meniscal cyst were treated with arthroscopic cyst excision and meniscal debridement. Five of 7 horses had lameness attributable to femorotibial joint pathology, while the remaining 2 horses had meniscal cysts found incidentally during diagnostic arthroscopy for the treatment of osteochondritis dissecans of the lateral trochlear ridge of the femur. Five of 6 horses with long‐term follow‐up were sound and a 7th horse was improved 11 months after surgery. Conclusions and potential relevance: Meniscal cysts, while uncommon, can be associated with progressive lameness in the horse. Surgical excision of the cysts results in resolution or improvement of symptoms, without evidence of recurrence on follow‐up examination.  相似文献   

9.
Prepurchase examinations are commonly used in the evaluation of sport horses. No data have been published concerning the use of traditional Chinese veterinary medical (TCVM) channel palpation with respect to the musculoskeletal status of sport horses for sale. The objective of the study is to summarize the results of channel evaluation when integrated with a Western examination in a series of prepurchase examinations. The prepurchase examination records of 235 sport horses were reviewed. The examined horses were presented as serviceable for the intended use. The examinations were performed by a single observer. The TCVM palpation examination and Western examinations, which often included radiography, infrared thermometry, diagnostic ultrasound, fiberoptic endoscopy, and diagnostic blood screens, were used to further evaluate the musculoskeletal system. The data were used to define the relationship between soundness, lameness, channel imbalance, and sale outcome. Over 6 years, 235 horses were examined. One hundred fifty-six (66%) were sound at their working gaits, and 79 (34%) had observable lameness. Two thirds of lame horses had palpable channel imbalance. Only a quarter of sound horses presented with palpable channel imbalance. Sound horses with no channel imbalance, that is, level channels, were most frequently sold, and lame horses with channel imbalance most frequently were not sold. Significantly more sound horses with level channels were sold as compared with sale outcome of sound horses with unbalanced channels. In conclusion, the TCVM channel examination is a useful component in the integrated prepurchase examination of sport horses.  相似文献   

10.
The objective of this study was to assess the reliability of lameness scoring in horses. One veterinary surgeon examined nineteen lame horses on four occasions. Gait was recorded by camcorder, and scored from 0 to 10 ranging from sound to non-weight bearing lameness. A global score of overall change in lameness during the study was also determined for each horse. To measure intra-assessor reliability of the scoring systems, one veterinary surgeon scored videotapes of the horses' gaits on two occasions. To measure inter-assessor reliability, three veterinary surgeons viewed the videotapes, assigning individual lameness scores plus global scores to each horse. Reliability of individual lameness scoring was good intra-assessor, but only just within our acceptable limit inter-assessor. However, global scoring of change in lameness throughout the study was found to be reliable overall. Since clinician scoring is commonly used to assess lameness in horses, this is an important finding, fundamental to future clinical studies.  相似文献   

11.
Seven hundred and eighty-eight Standardbred pacers competing in 8378 races at one racetrack were analysed to determine the effects of the administration of prerace frusemide on racing times (RT). Frusemide was administered i.v. 4 h before the race to pacers diagnosed with exercise-induced pulmonary haemorrhage (EIPH). Of the pacers, starting in the 1997 racing season, 32.5% received prerace frusemide. This study demonstrated that administration of frusemide prior to racing significantly decreased RT. There was an overall significant decrease (P<0.00001) in RT of 0.67 s. The overall RT for horses, geldings, and females, were mean +/- s.e 117.91 +/- 0.06, 118.20 +/- 0.03 and 118.86 +/- 0.04, respectively. RT progressively decreased until age 6 and increased thereafter. Horses, geldings and females ran a mean of 0.46, 0.31 and 0.74 s faster, respectively, with prerace administration of frusemide. This decrease in RT following prerace administration was most pronounced in younger pacers. In this study, a greater percentage of older pacers received prerace frusemide; however, the effect of frusemide on RT was decreasing with age. Prerace venous acid-base screening was performed in 2729 of the pacers competing. Pennsylvania Harness Racing Commission Regulations disqualify Standardbreds from racing with a base excess of over 10 and 12 mmol/l for Standardbreds without and with prerace administration of frusemide. The prerace venous acid-base levels were not significantly related to RT and, for those Standardbreds also sampled following the race, there was no correlation between pre- and postrace acid-base status.  相似文献   

12.
Sagittal groove injuries of the proximal phalanx are an important cause of lameness in performance horses. The purpose of this retrospective case series study was to describe standing low‐field magnetic resonance imaging (MRI) characteristics of these injuries in a group of Warmblood horses. Horses with an MRI diagnosis of sagittal groove injuries involving the proximal phalanx and that had follow‐up MRI and clinical outcome information were included. Findings from clinical examinations, diagnostic tests, and other imaging modalities were recorded. All MRI studies were retrieved for re‐evaluation by an experienced, board‐certified veterinary radiologist. A total of 19 horses met inclusion criteria. All horses had MRI lesions consistent with unilateral or bilateral sagittal groove injuries of the proximal phalanx and abnormal mineralization of the sagittal ridge of the third metacarpal/metatarsal bone. Fifteen horses (79%) had concurrent osteoarthritis of the affected metacarpophalangeal/metatarsophalangeal joint. Eighteen horses received conservative therapy and all horses still had osseous abnormalities detected at the time of follow‐up MRI. Thirteen horses (68.5%) were still lame at the time of follow ‐ up, whereas the other six horses (31.5%) had become sound and returned to the previous level of exercise. Findings indicated that, for mature Warmblood horses, acute or chronic injuries of the sagittal groove of the proximal phalanx may have variable standing low‐field MRI characteristics. Based on this sample of 19 horses, findings also indicated that the prognosis for performance soundness in horses diagnosed with sagittal groove injury of the proximal phalanx and concurrent osteoarthritis is poor.  相似文献   

13.
OBJECTIVE: To determine whether a unique dihydropyridine (BAYTG 1000) would be beneficial in preventing laminitis in horses. ANIMALS: 16 clinically normal adult horses. PROCEDURE: 8 pairs of horses were used in a controlled double-blind study, using sex- and age-matched horses randomly assigned to treatment or control groups. Horses were subjected to carbohydrate overload to induce laminitis. Treated horses were administered BAY TG 1000 (30 mg/kg, PO, q 24 h) for 3 days. Hoof wall surface temperature (HWST) and lameness were recorded at 4-hour intervals. The HWST was adjusted on the basis of time of onset of lameness and evaluated, using a repeated-measures ANOVA. Lameness 8 hours after onset and clinical status 72 hours after onset of lameness were evaluated, using Mann-Whitney procedures. RESULTS: Analysis revealed that BAYTG 1000 did not decrease the incidence of lameness but significantly ameliorated prodromal hypothermia, lessened the severity of lameness 8 hours after onset of lameness, and improved the clinical status of horses 72 hours after onset of lameness. CONCLUSION AND CLINICAL RELEVANCE: Results support the conclusion that BAYTG 1000 was protective when used in prevention of laminitis. The drug decreased severity and improved clinical status (recovery) of induced lameness, which was interpreted to mean that the drug's actions were on mechanisms important but secondary to primary causal mechanisms of laminitis. Therefore, drugs that enhance digital perfusion via alteration of rheologic activity may have potential use in the prevention and management of laminitis in horses.  相似文献   

14.
Thirteen (65 per cent) of 20 horses subjected to carbohydrate overload developed Obel Grade 3 lameness within 56 h. Increases in plasma endotoxin from control levels of less than 0.1 ng/litre to values ranging from 2.4 to 81.53 ng/litre were measured in 11 (85 per cent) of 13 horses during the onset of Obel Grade 3 lameness. Obel Grade 3 lameness was associated with rises in plasma Gram-negative endotoxin levels in 11 (92 per cent) of 12 horses. Two peak increases separated by 16 h were verified in five (45 per cent) of 11 horses that exhibited both endotoxaemia and Obel Grade 3 lameness. The first peak occurred, on average, at 32 h and the second peak at 48 h post overload when only one peak was measured, this occurred in four horses at the average time of 24 h whereas in another three horses only a 48 h or 56 h peak was detected after carbohydrate overload.  相似文献   

15.
There has been no analysis of a hopping‐type forelimb lameness syndrome seen in ridden horses. The objectives of this retrospective study were to describe the clinical features of this syndrome, response to diagnostic analgesia and imaging findings and to document post mortem findings. Clinical records from 2002 to 2014 were reviewed and data concerning signalment, history, lame limb(s), lameness characteristics, response to diagnostic analgesia and diagnostic imaging were recorded. There were 46 horses from 4 to 13 years of age, 6 of which had a history of known or suspected trauma immediately before the onset of reduced performance or lameness. Lameness seen when ridden was characterised by an intermittent shortened cranial phase of the step of the lame forelimb at the trot and marked elevation of the head as the affected limb was protracted, with the horse appearing to ‘hop’ (on the contralateral limb) as if trying to break to canter. When lameness was at its worst horses were unwilling to trot. Three horses showed sporadic severe stumbling. Local analgesia of the affected limb did not improve the lameness and in 16 horses lameness deteriorated. Three of 5 horses showed some improvement (≥2/8 grades) in the hopping‐type lameness after intra‐articular analgesia of the articular process joints of the sixth and seventh cervical vertebrae, ipsilateral to the lame forelimb. Radiographic, ultrasonographic and nuclear scintigraphic examinations were inconclusive. Two of 4 horses responded to treatment with gabapentin. In 3 horses post mortem examination revealed mild lymphocytic inflammation within or around the dorsal root ganglia of the fifth and sixth cervical nerve roots, sixth cervical nerve root or second thoracic nerve root ipsilateral to the lame limb. Idiopathic hopping‐type lameness syndrome in ridden horses may be a pain‐related condition ± a neurological component and currently has a guarded prognosis.  相似文献   

16.
OBJECTIVE: To describe the demographic and clinical characteristics, management practices, and owner perception of a population of geriatric horses, and to compare these data with findings in a group of younger horses. DESIGN: Original study. ANIMALS: 218 horses. PROCEDURE: Data were collected via a survey tool from owners of 165 horses that were > or = 20 years of age and 53 horses that were < 20 years of age. RESULTS: Compared with young horses, the geriatric group included a significantly greater number of ponies; geriatric horses were also more likely to have a history of colic, dental disease, tumors, lameness, and pituitary disease, but not laminitis, diarrhea, allergies, respiratory tract disease, thyroid disease, or fractures. Horses that had participated in Western equestrian disciplines were more likely to have a history of lameness. Among old horses, those with pituitary dysfunction were more likely to have a history of laminitis than those without pituitary dysfunction. Geriatric horses were more likely to have long hair and shedding abnormalities than were younger horses. Owners perceived their horses as old at approximately 22 years of age. In horses older than 16.5 years of age, age was a negative factor in the purchase of horses. CONCLUSIONS AND CLINICAL RELEVANCE: Geriatric and young horses share some similar health problems, but old horses have distinct health problems and veterinary medical requirements. The management and athletic history of horses may influence health as they age.  相似文献   

17.
OBJECTIVE: To describe the clinical abnormalities found on post-race examination of poorly performing Standardbreds. METHOD: The results of 541 post-race veterinary examinations on Standardbreds were analysed. The horses were selected for examination by the stipendiary stewards on the basis of poor performance from a population of approximately 20,000 runners which competed at Harold Park Paceway, Sydney. RESULTS: Clinical abnormalities were detected on post-race examination in 264 of the 541 poorly performing horses. Some horses displayed more than one abnormality. Twenty three individual abnormalities were reported. Seventy three horses had suffered interference-type injuries (cross firing, scalping, over reaching) during the race. Lameness was the second most commonly found abnormality (n = 60), with 73% of these lamenesses being in a forelimb. Twenty nine horses had sacroiliac pain (representing 10.6% of the abnormalities detected). Poor recovery, exercise induced pulmonary haemorrhage, respiratory infection or nasal discharge, gluteal pain, unilateral nasal haemorrhage and mouth injuries complete the list of the ten most common findings. CONCLUSION: Interference-type injuries, lameness and sacroiliac pain were the most common abnormalities found on post-race examination of Standardbreds, which performed poorly.  相似文献   

18.
Over a 19‐year period, 51 horses showing chronic lameness or gait abnormality that was not fully responsive to veterinary treatment at other referral clinics were referred to us for further treatment. All had either failed to have a diagnosis made, or treatment for the diagnosed conditions had shown only partial response. After further examination, we concluded that they showed abnormal function of the neck or back, but there was no obvious pathological cause. A diagnosis of ‘somatic dysfunction’ was made, characterised by altered muscle tone, tenderness or subtle changes in gait, similar to the condition recognised in human medicine. These cases subsequently underwent osteopathic treatment under sedation. Forty‐six cases (90.2%) responded to treatment in the short term (6 months after treatment). Seventeen (53.1%) were working at the same level or better than previously at least a year after treatment. Ten (31.2%) worked at a reduced level for between 1.5 and 10 years. Nineteen cases were lost to long‐term follow‐up. The findings of this study suggest that neck and back problems may be overlooked when investigating chronic lameness. When no pathology can be pinpointed as a cause of lameness, a diagnosis of somatic dysfunction as a primary problem should be considered. The presence of somatic dysfunction as a secondary complicating factor should not be overlooked. Stiffness and/or low grade pain in the spine of horses can result in persistent abnormal posture, gait, or behaviour, similar to ‘somatic dysfunction’ seen in the human patient. The cause is neuromuscular in origin, rather than resulting from tissue pathology. The diagnosis made clinically can be confirmed with thermography. This study confirms that osteopathic manipulation of the spine of horses can be a valuable treatment for cases of lameness that do not respond fully to standard veterinary treatments.  相似文献   

19.
The objective was to generate evidence for clinical efficacy and acceptability of a second generation coxib, firocoxib, administered orally for 14 days to lame horses under field conditions compared with a classic nonsteroidal anti-inflammatory drug, vedaprofen, in a prospective, randomized, controlled, double-blinded, multicenter field trial. Ninety-six client-owned horses with American Association of Equine Practitioners score of at least grade 3 lameness or grade 2 lameness plus at least a score of 2 for either pain on palpation, range of motion, or joint swelling were analyzed. Horses were administered 0.1 mg/kg firocoxib orally at 24 hour intervals (n = 48) or 1.0 mg/kg vedaprofen paste at 12 hour intervals for 14 days (single loading dose of 2.0 mg/kg vedaprofen) (n = 48). Physical examinations and lameness evaluations were conducted on Day 1 (V1, before treatment) and on Days 7 (V2) and 14 (V3). Blood chemistry and hematology profiles were also evaluated. With regard to the primary variable, clinical improvement, 83% of the firocoxib-treated horses improved at V3 compared with 65% of vedaprofen-treated horses improved meeting the criteria defined to demonstrate noninferiority of firocoxib to vedaprofen. Health and behavioral abnormalities for side effect detection occurred at the rate of 2% (1 horse) and 8% (4 horses) for firocoxib- and vedaprofen-treated horses, respectively. Changes in hematology and blood chemistry values from V1 to V3 were not significantly different between treatment groups. Firocoxib, formulated as an oral paste was highly effective, well tolerated, and acceptable for the control of pain and inflammation associated with lameness in horses under field conditions.  相似文献   

20.
Between 1989 and 1999, 351 clinical examinations and six postmortem examinations were made on the six great bustards (Otis tarda) maintained at the Whipsnade Wild Animal Park. Soft tissue-related traumatic injuries accounted for 35 per cent of all the clinical findings, musculoskeletal disorders accounted for 26 per cent, and lameness was one of the main reasons for a veterinary examination. Poor condition accounted for 30 per cent of the clinical findings and was associated with periods of cold wet weather during the winter and spring; the affected birds were isolated and provided with nutritional support. Haemosiderosis and haemochromatosis were observed in four of the five birds from which samples were taken for histopathology.  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号