Difference between revisions of "Bovine Papillomaviruses"

Revision as of 14:11, 4 March 2011

Synonyms

Bovine warts, Papoaviruses, Fibropapillomatosis

Introduction

There at least five strains of papillomavirus, each of which has a specific predilection site on the cow.

BPV type I causes wart like lesion on the nose, teats or penis and affect young cattle and will usually regress over time.
BPV type II causes warts all over the skin of the head and neck of young cattle and will usually regress over.
BPV type III causes atypical warts which are smooth and white in appearance and occur mainly on the teats and udders of older cows.
BPV type IV causes papillomas in gut, especially the rumen, and bladder, as well as lesions on the eye. This particular systemic form can be refered to as papillomatosis. The papillomas caused by this strain can undergo malignant transformation to alimentary carcinomas, however, this transformation is usually concurrent with grazing bracken (co-carcinogen) and ingesting quercetin (immunosuppressant). In Hereford cattle, the papilloma can transform to a squamous cell carcinoma of the eye, where UV light acts as the co-carcinogen.
BPV type V causes tiny warts on the teat.

Infection is spread by direct contact from cow to cow or bu indirect contact from fomites. With most strains, calves are most commonly affected.

Clinical Signs

These will obviously vary depending on which strain of the virus is contracted. In BPV type IV signs will be concurrent with the body sytem affected e.g. haematuria if in the bladder or diarrhoea and bloat if in the rumen.

On the skin, the virus will at first appear as small, smooth raised nodules in the characteristic regions, which will then enlarge. Some will become rough and cauliflour- like in appearance, whilst others may become pedunculated.

A characteristic feature of this disease is that the warts will regress spontaneously over a period no longer than one year.

Diagnosis

Lesions are characteristic in appearance and location along with the signalment of the animal are enough to make a presumtive diagnosis.

Treatment and Control

Often no treatment is required as spontaneous regression usually occurs. If the cow traumatises a wart then a short course of antibiotics or anti inflammatories may be used to aid its immeditate relief. Any other treatment is only of cosmetic value and so is generally only performed by those wishing to show their cattle. Treatment of warts would include injection with lithium anitomy thiomalate 6%, removal by cryosurgery or cold steel surgery.

Control measures are not usually necessary due to the mildness of the disease.

References

Andrews, A.H, Blowey, R.W, Boyd, H and Eddy, R.G. (2004) Bovine Medicine (Second edition), Blackwell Publishing
Blowey, R, Weaver, A.D, (2003) Colour Atlas of Diseases and Disorders of Cattle, Mosby Publishing
Radostits, O.M, Arundel, J.H, and Gay, C.C. (2000) Veterinary Medicine: a textbook of the diseases of cattle, sheep, pigs, goats and horses Elsevier Health Sciences

@@ Line 1: / Line 1: @@
-*2 groups:
+== Synonyms ==
-#Fibropapillomas: viral DNA sequences, but no virus found
-#Epithelial Papillomas: virus found
-*Calves most commonly affected
-*Usually resolves spontaneously
-*Can undergo malignant transformation to alimentary carcinomas
-**Usually concurrent with grazing bracken (co-carcinogen) and ingesting quercetin (immunosuppressant)
-*Can cause squamous cell carcinoma of the eye in Hereford cattle, where UV light acts as the co-carcinogen
-===Papillomatosis===
+Bovine warts, Papoaviruses, Fibropapillomatosis
-* Caused by Bovine Papillomaviruses|bovine papilloma virus-4.
-* Usually affects pedunculated structures in [[Reticulum - Anatomy & Physiology|reticulum]]/[[Rumen - Anatomy & Physiology|rumen]] of cattle.
-===Viral papillomas===
-in the pharynx
+== Introduction ==
-[[Category:Nasopharynx - Pathology]]
+There at least five strains of papillomavirus, each of which has&nbsp;a specific predilection site on the cow.
-[[Category:Papomaviridae]][[Category:Cattle Viruses]][[Category:Forestomach - Proliferative Pathology]]
-[[Category:Respiratory System - Hyperplastic/Neoplastic Pathology]]
+*BPV type I causes wart like lesion on the nose, teats or penis and affect young cattle and will usually&nbsp;regress over time.
-[[Category:To_Do_-_Kate]]
+*BPV type II causes warts all over the skin of the head and neck of young cattle and will usually&nbsp;regress over.
+*BPV type III causes atypical warts which are smooth and white in appearance and occur mainly on the teats and udders of older cows.
+*BPV&nbsp;type IV causes papillomas in gut, especially the rumen,&nbsp;and bladder, as well as lesions on the eye. This particular systemic form can be refered to as papillomatosis. The papillomas caused by this&nbsp;strain can undergo malignant transformation to alimentary carcinomas, however, this transformation is usually concurrent with grazing bracken (co-carcinogen) and ingesting quercetin (immunosuppressant). In Hereford cattle, the papilloma can transform to a squamous cell carcinoma of the eye, where UV light acts as the co-carcinogen.
+*BPV type V causes tiny warts on the teat.
+Infection is spread by direct contact from cow to cow or bu indirect contact from fomites. With most strains, calves are most commonly affected.&nbsp;&nbsp;&nbsp;
+== Clinical Signs ==
+These will obviously vary depending on which strain of the virus is contracted. In BPV type IV signs will be concurrent with the body sytem affected e.g. haematuria if in the bladder or diarrhoea and bloat&nbsp;if in the rumen.
+On the skin, the virus will at first appear as small, smooth raised nodules in the characteristic regions, which will then enlarge. Some will become rough and cauliflour- like in appearance, whilst others may become pedunculated.
+A characteristic feature of this disease is that the warts will regress spontaneously over a period no longer than one year.
+== Diagnosis ==
+Lesions are characteristic in appearance and location along with the signalment of the animal are enough to make a presumtive diagnosis.
+== Treatment and Control ==
+Often no treatment is required as spontaneous regression usually occurs. If the&nbsp;cow traumatises a wart then&nbsp;a short course of antibiotics or&nbsp;anti inflammatories may&nbsp;be used to aid its immeditate relief. Any other treatment&nbsp;is only of cosmetic value and so is generally only performed by those wishing to show their cattle. Treatment of warts would include injection with lithium anitomy thiomalate 6%, removal by cryosurgery or cold steel surgery.
+Control measures are not usually necessary due to the mildness of the disease.
+== References ==
+Andrews, A.H, Blowey, R.W, Boyd, H and Eddy, R.G. (2004) Bovine Medicine (Second edition), Blackwell Publishing <br>Blowey, R, Weaver, A.D, (2003) Colour Atlas of Diseases and Disorders of Cattle, Mosby Publishing<br>Radostits, O.M, Arundel, J.H, and Gay, C.C. (2000) Veterinary Medicine: a textbook of the diseases of cattle, sheep, pigs, goats and horses Elsevier Health Sciences <br>
+[[Category:Nasopharynx_-_Pathology]] [[Category:Papomaviridae]] [[Category:Cattle_Viruses]] [[Category:Forestomach_-_Proliferative_Pathology]] [[Category:Respiratory_System_-_Hyperplastic/Neoplastic_Pathology]] [[Category:To_Do_-_Review]]