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Vet News

  • Factors associated with colostrum immunoglobulin G concentration in northern-Victorian dairy cows

    Tuesday, Jun 27 '17 02:56

    Objectives To determine the proportion of first-milking colostrum samples produced on four northern-Victorian dairy farms that meet industry standards in terms of immunoglobulin G (IgG) concentration and to identify risk factors that affect colostrum quality. Methods Colostrum IgG concentrations from 442 dairy cows on four farms were estimated using a Brix refractometer and risk factors for colostrum IgG concentration were determined using multivariable logistic regression. Results Only 39% of samples met the definition of high quality. The strongest predictor for colostrum quality was the interval from calving to colostrum harvesting. Colostrum harvested from cows within 12 h of calving was 6-fold more likely to be high quality compared with colostrum harvested later. Colostrum from cows in ≥ 4th lactation was nearly twice as likely to be high quality compared with cows entering their 1st lactation. If the calf was not allowed to suckle from the dam prior to colostrum harvesting, the odds of producing high-quality colostrum were nearly 4-fold greater. If the cow had not leaked colostrum prior to harvesting, it was more than 3-fold more likely to produce high-quality colostrum. Conclusions The majority of samples assessed were below industry standard. Herd, lactation number, calf suckling or cow leaking colostrum prior to harvesting and time between calving and colostrum harvesting were factors that influenced colostrum IgG concentration. The results support current industry recommendations of harvesting colostrum shortly after parturition (ideally within 12 h of calving) and testing the quality of all colostrum prior to feeding to dairy calves. Read more...

  • Efficacy of a commercial vaccine against different strains of rabbit haemorrhagic disease virus

    Tuesday, Jun 27 '17 02:55

    Background This study investigated the ability of a commercial rabbit haemorrhagic disease virus (RHDV) vaccine (Cylap®) to protect rabbits from disease caused by two different strains of the virus (v351 and K5) that are used or proposed to be used for wild rabbit control in Australia. These strains of the RHDV1 genotype belong to the ‘classical RHDV’ and ‘antigenic variant RHDVa’ subtypes, respectively. Methods Vaccinated rabbits were exposed to very high doses of the virus either by direct oral dosing or by exposure to infected rabbit livers. Results & Conclusion All vaccinated rabbits were protected against rabbit haemorrhagic disease, indicating that the Cylap® vaccine is effective against both strains of the virus under experimental conditions. Read more...

  • Trypanosomiasis in an Australian little red flying fox (Pteropus scapulatus)

    Tuesday, Jun 27 '17 02:55

    Case report An adult female Australian little red flying fox (Pteropus scapulatus) presented with icterus and anaemia. Examination of a blood smear revealed numerous trypanosomes 20.4–30.8 µm long with tapered ends. Necropsy and histological findings were consistent with trypanosome infection of lymphoid tissue and intravascular haemolysis. Sequence and phylogenetic analysis demonstrated this trypanosome species to be genetically distinct and most similar to Trypanosoma minasense and Trypanosoma rangeli (with a genetic distance of 1% at the 18S rRNA locus for both). Conclusion To the authors’ knowledge this is the first report of a trypanosome infection associated with clinical disease in bats. Read more...

  • Long-term control of olfactory neuroblastoma in a dog treated with surgery and radiation therapy

    Tuesday, Jun 27 '17 02:55

    Background Olfactory neuroblastoma is a rare malignancy of the nasal cavity in dogs that is thought to arise from specialised sensory neuroendocrine olfactory cells derived from the neural crest. Case report An 8-year-old dog was presented for reclusiveness and pacing. On CT and MRI, a contract-enhancing mass was disclosed within the rostral fossa, extending caudally from the cribriform plate into the left nasal sinus. Surgical excision was performed and the diagnosis was histological grade III (Hyams grading scheme) olfactory neuroblastoma. Based on human CT criteria this was high stage (modified Kadish stage C). Surgical excision was incomplete and was followed by curative-intent radiation therapy using a linear accelerator to a total dose of 48 Gy. Conclusion The dog survived 20 months after diagnosis. Although olfactory neuroblastoma is a rare tumour in dogs, aggressive local therapy may allow for prolonged survival, even when the tumour is advanced. Read more...

  • Cricopharyngeal dysphagia and phenobarbitone-responsive sialoadenosis in a Miniature Poodle

    Tuesday, Jun 27 '17 02:55

    Case report An 11-year-old male neutered Miniature Poodle was investigated for ptyalism, weight loss and anorexia. Cricopharyngeal dysphagia was diagnosed using fluoroscopy, and non-inflammatory salivary disease was diagnosed using a combination of cytology and computed tomography. The dog was successfully managed with phenobarbitone. Conclusion To the authors’ knowledge this is the first time acquired cricopharyngeal dysphagia and phenobarbitone-responsive sialoadenosis have been described together. Read more...

Vet News

  • Pictures of cute animals may boost marital satisfaction

    Sunday, Jun 25 '17 05:00

    Learning to associate spouses with unrelated positive stimuli - such as pictures of puppies - could help to improve marital satisfaction, study suggests. Read more...

  • Snake venom could lead to safer blood clot prevention

    Sunday, Jun 11 '17 05:00

    Researchers have found that a protein in the venom of the Tropidolaemus wagleri snake may lead to a safer antiplatelet medication. Read more...

  • Dogs: Personal trainers for older owners?

    Saturday, Jun 10 '17 05:00

    Older dog owners walk more than non-dog owners, according to a new study, adding further evidence that owning a dog is good for our health. Read more...

  • Six ways your pet can boost health and well-being

    Saturday, Jun 3 '17 01:00

    Our pets not only bring us joy and companionship, they offer benefits for health and well-being, too. We take a closer look at what these are. Read more...

  • Declawing linked to aggression and other abnormal behaviors in cats

    Thursday, May 25 '17 05:00

    Declaw surgery (onychectomy) is illegal in many countries but is still a surprisingly common practice in some. Read more...