Vetlexicon

Vetlexicon Clinical support at your fingertips. Helping veterinary professionals on the front line of animal care.

Vetstream’s clinical reference services – Canis, Felis, Lapis and Equis – provide the world’s largest online source of peer reviewed point-of-care veterinary content. Featuring over 18,500 articles, including images and videos, our clinical information is peer-reviewed and regularly updated to help you keep abreast of the latest veterinary methodology and techniques. Webpartner: easy-to-manage, pr

ofessional looking websites to suit any practice. Vetacademy: our online Continuing Professional Development service. We provide an extensive range of training modules covering small animal, equine, exotic animal and business management topics on an eLearning platform and videos on a pay-per-view video player.

With a career spanning five decades, Derek Knottenbelt OBE BVMYS DVMS DipECEIM DipACVIM MRCVS is an internationally accl...
05/06/2026

With a career spanning five decades, Derek Knottenbelt OBE BVMYS DVMS DipECEIM DipACVIM MRCVS is an internationally acclaimed equine internal medicine specialist whose distinguished achievements have cemented his place as one of the most influential figures in veterinary medicine today.

Derek qualified from Edinburgh University in 1970. He is a Diplomate of the European College of Equine Internal Medicine and of the American College of Veterinary Internal Medicine and held a personal chair at the University of Liverpool until his "retirement" in 2010. He founded with Horsepower in 2009, and the first trip took place in 2010. Colleagues accurately describe Derek as a "force of nature" and is tireless in his efforts to support equine welfare.

His topics of interest as a speaker include a wide range of equine medicine topics that are covered on Vetlexicon Equis. With a special interest in dermatology and wounds, oncology, ophthalmology and neurology, including headshakers, the list certainly is not limited to this!

View his Vetlexicon content, and read his bio here 👉 https://tr.ee/derek-knottenbelt

Primary and inherited cataracts are rare in the cat.Feline cataracts are most commonly secondary to uveitis, systemic di...
04/06/2026

Primary and inherited cataracts are rare in the cat.

Feline cataracts are most commonly secondary to uveitis, systemic disease, or trauma — so when you spot lens opacity in your feline patients, a thorough diagnostic work-up is key to identifying the underlying cause.

Early referral to a veterinary ophthalmologist for surgical suitability assessment can be sight-saving, with a good prognosis following lens removal.

Read the full peer-reviewed article on .

👉 https://www.vetlexicon.com/felis/core-competencies/articles/cataract-3

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Cataracts in cats has been written and peer-reviewed by
Peter Renwick MA Vet MB DVOphthal MRCVS
David Williams MA MEd VetMD PhD EdD DipECAWBM CertVOphthal CertWEL FRSB FRCVS
Dennis Brooks DVM PhD DipACVO
Fiona McKeever MVB MANCVS GPCert(Ophthal) MRCVS

Vetstream are delighted to support the with Horsepower project, run by Vetlexicon Equis contributor, Derek Knottenbelt....
30/05/2026

Vetstream are delighted to support the with Horsepower project, run by Vetlexicon Equis contributor, Derek Knottenbelt.

For 15 years, the Vets with Horsepower project has supported vulnerable children and animals around the world

The project is referred to as the “perfect mix of charity and veterinary education”. Made up of experienced equine vets who found they have common ground:

🌍They believe the world can be made a better place for everyone, one step at a time.
🐎They all have a shared skill set as respected equine vets and lecturers.
🏍️They have a thing for motorbikes!

👉 https://www.vetswithhorsepower.com/

28/05/2026

Grass sickness if a frequently fatal equine dysautonomia/polyneuropathy of the autonomic and enteric nervous systems of grazing equids.

Grass sickness is a disease with acute, subacute, or chronic presentations and is most commonly seen in spring, peaking in May. Predominant signs result from dysfunction of the gastrointestinal tract.

Learn more about this disease with this informative article from .

👉 https://www.vetlexicon.com/equis/gastrohepatology/articles/grass-sickness-3

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Grass sickness has been written and peer-reviewed by a collection of experts, including
Frank Andrews DVM MS DipACVIM
Annalisa Barrelet BVetMed MS CertESM MRCVS
Rachael Conwell BVetMed DipECEIM CertEM(IntMed) MRCVS
Caroline Hahn DVM MSc PhD DipECEIM DipECVN MRCVS
Bruce McGorum BSc BVM&S MSc PhD CertEM(Int Med) DipECEIM FRCVS
Elspeth Milne PhD FRCPath FHEA DipECVCP FRCVS
Rachel Murray MA VetMB MS DipECVS DipACVS PhD MRCVS
Jonathan Naylor DVM PhD DipACVIM
Andrew Rich BVSc DiplECVP AFHEA MRCVS

26/05/2026

Cloacopexy and colopexy can be valuable surgical options in poultry for the management of recurrent cloacal prolapse, helping to restore anatomy and reduce recurrence. Careful case selection and appropriate technique are key to successful outcomes.

Refresh your knowledge on indications, surgical approach, and postoperative care with this practical article on .

👉 https://www.vetlexicon.com/avis/surgery/articles/cloacopexy-colopexy/

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Cloacopexy / colopexy has been written and peer-reviewed by
Vicki Baldrey BVSc BSc(Hons) DZooMed(Avian) FHEA MRCVS
Henrietta Kodilinye-Sims BVetMed PgDipVEPH GCLT MRCVS

Skin shedding is common after brumation and with the rise in temperature during Spring. Unfortunately, this also increas...
22/05/2026

Skin shedding is common after brumation and with the rise in temperature during Spring. Unfortunately, this also increases the likelihood of dysecdysis.

Refresh your knowledge on its diagnosis, treatment, and prevention with this article on .

👉 https://www.vetlexicon.com/exotis/reptiles/dermatology/articles/ecdysis-dysecdysis/

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Ecdysis / dysecdysis has been written and peer-reviewed by
Robert Johnson BVSc(Sydney) MANZCVS CertZooMed BA
Nathalie Wissink-Argilaga LicVet CertAVP(ZooMed) GPCert(ExAP) DZooMed(Reptilian) MRCVS
Livia Benato DVM MScR CertZooMed DipECZM(Small Mammal) MRCVS

21/05/2026

Proteinuria in rabbits can be a useful indicator of underlying renal disease, but results should always be interpreted carefully.

A structured approach is important for determining clinical significance and guiding further investigation.

Refresh your knowledge on causes, diagnosis, and interpretation with this article on proteinuria in rabbits on .

👉 https://www.vetlexicon.com/lapis/urinary/articles/proteinuria/
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Proteinuria has been written and peer-reviewed by
Rebecca Macmillan BVetMed BSAVA PGCertSAM MRCVS
Anna Meredith OBE MA VetMB CertLAS DipECZM DZooMed(Mammalian) PhD FRCVS

Methiocarb is a carbamate pesticide used as an insecticide, acaricide, molluscicide and bird repellent.Cats are at risk ...
19/05/2026

Methiocarb is a carbamate pesticide used as an insecticide, acaricide, molluscicide and bird repellent.

Cats are at risk from ingesting the poison put down by gardeners or ingesting prey that has ingested the poison. Affected cats may display hypersalivation, vomiting, tremor, dyspnea and/or convulsions.

Refresh your memory on diagnosing and treating methiocarb poisoning with .

👉 https://www.vetlexicon.com/felis/toxicology/articles/methiocarb-toxicity/

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Methiocarb toxicity was written and peer-reviewed by
Rosalind Dalefield BVSc PhD DipABVT DipABT
Nicola Bates BSc(Brunel) BSc(Open) MSc MA SRCS

The spread of processionary moth caterpillars across Western Europe has increased the incidence of reactions to their ur...
14/05/2026

The spread of processionary moth caterpillars across Western Europe has increased the incidence of reactions to their urticating hairs. They are found in South East England, continental Europe, North Africa and the Middle East.

The shed hairs can persist in the environment for years, and if licked or ingested, can cause intense swelling of the tongue and oral tissues, which can lead to severe tissue damage and necrosis.

Read up on the pathogenesis, diagnostics and treatment with our toxicology article on .

👉 https://www.vetlexicon.com/canis/toxicology/articles/processionary-moth-caterpillar-toxicity-thaumetopoea-spp/

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Processionary moth caterpillar toxicity has been written and peer-reviewed by
Nicola Bates BSc(Brunel) BSc(Open) MSc MA SRCS
Rosalind Dalefield BVSc PhD DipABVT DipABT

11/05/2026

As the weather warms up and midge populations increase, it is important to be vigilant for the signs of the notifiable disease, Bluetongue, and any suspicions should be reported immediately.

Cattle can present with a range of clinical signs.

Refresh your memory with this informative and recently updated article from .

👉 https://www.vetlexicon.com/bovis/alimentary/articles/bluetongue/

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Bluetongue has been written and peer-reviewed by
Belal Hossain DVM MPH
Jo Oultram BVSc CertCHP DBR SFHEA MRCVS
Vetstream Ltd
Sophie Mahendran BVM BVS DipECBHM MRCVS

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