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This paper describes five naturally occurring clinical cases of infectious canine cyclic thrombocytopenia that were the first serologically confirmed cases of Ehrlichia platys infection in Israel. In the USA this disease is considered subclinical, but the dogs in this study developed distinct clinical abnormalities. The signs observed by the owners included anorexia, lethargy, depression, weight loss and a mucopurulent nasal discharge. The principal findings on physical examination included lymphadenomegaly, pale mucous membranes, fever and the presence of ticks. The main abnormal haematological and biochemical findings included thrombocytopenia, the presence of giant platelets, low haematocrit, monocytosis and low albumin concentrations. All five dogs were less than two years of age, and four were purebred dogs, suggesting that these two factors may be associated with increased risk to infection and clinical disease. Two of the dogs were seropositive to E canis, a finding which is compatible with other reports, and which confirms that combined infections of E platys and E canis are common; it also suggests that E canis infections may contribute to the pathogenesis of E platys. The distinct clinical manifestation of the disease in these five dogs suggests that there may be a different, more virulent strain of E platys in Israel.
Vet Rec 1997 Sep 06
PMID:Clinical manifestations of infectious canine cyclic thrombocytopenia. 930 49

In 1998, equine influenza was diagnosed by serology and nucleoprotein enzyme-linked immunosorbent assay as the cause of acute respiratory disease in vaccinated and unvaccinated horses in the UK. The signs were generally milder in vaccinated horses and completely susceptible animals showed the most severe signs, including pyrexia, inappetence, coughing, mucopurulent nasal discharge and secondary bacterial pneumonia. In a detailed investigation of an outbreak among 52 vaccinated thoroughbreds in a flat racing yard, more than 60 per cent of the horses seroconverted on the evidence of paired serum samples tested by single radial haemolysis (SRH). Preliminary sequencing and characterisation of an isolate from this outbreak indicated that it was an 'American-like' strain. In addition, in this outbreak there was a larger proportion of horses with preinfection SRH titres greater than 140 mm2 that subsequently seroconverted than in other recent outbreaks from which 'European-like' strains have been isolated. This result suggested that the cross-protectivity between circulating 'American-like' strains and the 'European-like' strains of A/equine-2 viruses present in current vaccines may be decreasing.
Vet Rec 1999 Oct 16
PMID:Equine influenza in the United Kingdom in 1998. 1057 77

A prospective study of injuries and disease in a cohort of Australian thoroughbreds in training was conducted with the participation of 24 trainers. From the horses catalogued at a major yearling sale in 1995, 169 were enrolled in the study and followed through their two- and three-year-old racing seasons. The principal aim was to quantify the time lost in training as a result of the various categories of injuries and disease, recorded as either days of modified training, or weeks rested at pasture. Shin soreness was the most common condition in two-year-olds (affecting 42 per cent of the horses that had entered training), followed by fetlock problems (25 per cent), and coughs and nasal discharge (16 per cent). Lameness, excluding lacerations and traumatic injuries, was the most common reason for lost training days (56.2 per cent of total days modified) and for resting horses at pasture (81.2 per cent of total weeks rested for injury or disease). Of the individual categories of injury or disease, lacerations and traumatic injuries, coughs and nasal discharge, shin soreness, carpal problems and fetlock problems were the most important causes of modified training days. In terms of weeks rested at pasture, fetlock problems, shin soreness, carpal problems, and coughs and nasal discharge had the greatest impact. Major injury was uncommon in young horses in training, but there was a high incidence of relatively low-grade injuries and disease during the training of two-year-olds.
Vet Rec 1999 Oct 23
PMID:Impact of injuries and disease on a cohort of two- and three-year-old thoroughbreds in training. 1059 71

Nineteen sheep which were anorexic, pyrexic, coughing, dyspnoeic and had a nasal discharge and symptomatic thoracic sounds on auscultation, received a single subcutaneous dose of 10 mg/kg bodyweight of tilmicosin. The clinical signs were eliminated within four to six days. The kinetic profiles of the drug after a single subcutaneous injection were compared in five healthy sheep and five infected sheep. More of the drug was absorbed by the infected animals and its concentration remained higher for significantly longer. The drug was well tolerated and no local or systemic side effects were observed.
Vet Rec 2001 Jun 23
PMID:Effectiveness and kinetic behaviour of tilmicosin in the treatment of respiratory infections in sheep. 1146 63

A novel intranasal vaccine against disease caused by Bordetella bronchiseptica in cats was tested in a series of three experiments. In the first experiment a vaccinated group and an unvaccinated control group of kittens were challenged by the aerosol route with virulent B bronchiseptica three weeks after they had been vaccinated. The control kittens developed upper respiratory tract signs typical of feline B bronchiseptica infection, including rhinitis, a serous ocular and nasal discharge, fever, sneezing and coughing. The mean (sd) clinical score for the cats in the unvaccinated control group was 19.5 (5.4) compared with 1.53 (1.9) for the vaccinated group. In the second experiment vaccinated kittens were challenged with virulent B bronchiseptica 72 hours after they were vaccinated. Their mean clinical score was 2.76 (2.62) compared with 13.4 (3.33) for the control group. In the final experiment, vaccinated and unvaccinated control cats were challenged after six or 12 months. After six months the mean clinical scores were 13.9 (4.7) for the control group, compared with 1.33 (1.56) for the vaccinated group, and after 12 months the scores were 9.92 (5.79) for the control group compared with 0.92 (0.89) for the vaccinated group.
Vet Rec 2002 Apr 06
PMID:Studies of the efficacy of a novel intranasal vaccine against feline bordetellosis. 1199 73

Five of 10 pregnant, lactating mares, each with a foal at foot, developed neurological disease. Three of them became recumbent, developed complications and were euthanased; of the two that survived, one aborted an equine herpesvirus type 1 (EHV-1)-positive fetus 68 days after the first signs were observed in the index case and the other gave birth to a healthy foal on day 283 but remained ataxic and incontinent. The diagnosis of EHV-1 myeloencephalitis was supported by postmortem findings, PCR identification of the virus and by serological tests with an EHV-1-specific ELISA. At the time of the index case, the 10 foals all had a heavy mucopurulent nasal discharge, and PCR and the ELISA were used to detect and monitor EHV-1 infection in them. The status of EHV-1 infection in the five in-contact mares was similarly monitored. Sera from three of the affected mares, taken seven days after the index case were negative or had borderline EHV-1-specific antibody titres. In later serum samples there was an increase in the titres of EHV-1-specific antibody in two of the affected mares. In contrast, sera from the five unaffected in-contact mares were all EHV-1-antibody positive when they were first tested seven or 13 days after the index case.
Vet Rec 2003 Oct 04
PMID:Outbreak of equine herpesvirus type 1 myeloencephalitis: new insights from virus identification by PCR and the application of an EHV-1-specific antibody detection ELISA. 1458 30

Fifteen influenza-naive Welsh mountain ponies were randomly assigned to three groups of five. A single dose of a recombinant ALVAC vaccine was administered intramuscularly to five of the ponies, two doses, administered five weeks apart, were administered to five, and the other five served as unvaccinated, challenge controls. Two weeks after the completion of the vaccination programme, the ponies were all challenged by exposure to an aerosol of influenza virus A/eq/Newmarket/5/03. Their clinical signs were scored daily for 14 days according to a standardised scoring protocol, and nasal swabs were taken daily for 10 days to monitor the excretion of virus. The challenge produced severe clinical signs of influenza (fever, coughing, nasal discharge and dyspnoea) in all five control ponies, but the vaccinated ponies developed only mild disease, consisting of a serous nasal discharge lasting for only one day. The excretion of virus was almost completely suppressed in the vaccinated ponies, but the control ponies shed the virus for up to seven days after the challenge.
Vet Rec 2005 Mar 19
PMID:Efficacy of a recombinant equine influenza vaccine against challenge with an American lineage H3N8 influenza virus responsible for the 2003 outbreak in the United Kingdom. 1581 80

The aim of this study was to assess the effects of changes to the stable environment on exhaled markers of respiratory inflammation in six horses with clinical histories of recurrent airway obstruction. The horses were maintained for two weeks under conventional stable management (straw bedding and hay) and for two weeks on a reduced-dust regimen (paper bedding and ensiled grass), in a crossover study design. Exhaled ethane and carbon monoxide (CO) and exhaled breath condensate hydrogen peroxide (H(2)O(2)) were measured every three days under each regimen. The presence of clinical signs of airway inflammation (nasal discharge and cough) was monitored daily. The reduced-dust regimen was associated with fewer clinical signs of airway inflammation than the conventional regimen. Exhaled ethane and CO were significantly lower on the reduced-dust regimen and these markers were correlated with clinical signs of respiratory inflammation, but exhaled H(2)O(2) was not affected by the management regimen.
Vet Rec 2005 Oct 01
PMID:Effects of changes to the stable environment on the exhalation of ethane, carbon monoxide and hydrogen peroxide by horses with respiratory inflammation. 1619 75

Between March and May 2003, equine influenza virus infection was confirmed as the cause of clinical respiratory disease among both vaccinated and unvaccinated horses of different breeds and types in at least 12 locations in the UK. In the largest outbreak, 21 thoroughbred training yards in Newmarket, with more than 1300 racehorses, were affected, with the horses showing signs of coughing and nasal discharge during a period of nine weeks. Many of the infected horses had been vaccinated during the previous three months with a vaccine that contained representatives from both the European (A/eq/Newmarket/2/93) and American (A/eq/Newmarket/1/93) H3NN8 influenza virus lineages. Antigenic and genetic characterisation of the viruses from Newmarket and elsewhere indicated that they were all closely related to representatives of a sublineage of American viruses, for example, Kentucky/5/02, the first time that this sublineage had been isolated in the uk. In the recently vaccinated racehorses in Newmarket the single radial haemolysis antibody levels in acute sera appeared to be adequate, and there did not appear to be significant antigenic differences between the infecting virus and A/eq/Newmarket/1/93, the representative of the American lineage virus present in the most widely used vaccine, to explain the vaccine failure. However, there was evidence for significantly fewer infections among two-year-old horses than older animals, despite their having similar high levels of antibody, consistent with a qualitative rather than a quantitative difference in the immunity conveyed by the vaccination.
Vet Rec 2006 Feb 11
PMID:Description of the outbreak of equine influenza (H3N8) in the United Kingdom in 2003, during which recently vaccinated horses in Newmarket developed respiratory disease. 1757 55

Twelve horses with a history of a unilateral malodorous nasal discharge were examined clinically, endoscopically and radiographically. The head of one of the horses was examined by computed tomography. Tissue samples were taken for microbiology from four of the horses and for histology from three. The conchal necrosis was unilateral in 11 of the horses and bilateral in the other, and no particular concha was affected more than the others. The affected tissue was removed transendoscopically with a polypectomy snare while the horses were sedated and standing. Mild disinfectants were used locally in six of the horses. After the removal of all the necrotic tissue, the affected concha healed without any complications in all 12 horses.
Vet Rec 2008 Sep 06
PMID:Necrosis of the nasal conchae in 12 horses. 1877 76


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