Contagious postular dermatitis in goat treatment and prevention

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Contagious postular dermatitis in goat treatment and prevention contagious pustular dermatitis, sore mouth, or orf, is an acute dermatitis of sheep and goats caused

Contagious ecthyma (ORF)
Contagious ecthyma (also known as orf and sore mouth) is a quite common disease of sheep and goats caused by a poxvirus. The classic clinical signs are crusty scabs affecting the mucocutaneous junction of the nose and mouth. There may also be proliferative lesions affecting the oral mucosa.47 The oral lesions are usually seen in young animals born into endemic herds. Immun

ologically naïve older animals may develop clinical signs when exposed to clinically normal carrier animals.48 Orf lesions are differentiated from oral lesions of FMD and Bluetongue by the clinical signs of crusty scabs as opposed to erosions and ulcerative lesions. The clinical signs of contagious ecthyma are usually self-limiting in 3 to 6 weeks. Severely affected animals may require supportive care and assisted feeding if the mouth is sore enough to prevent nursing or if ewes have udder lesions significant enough to prevent the young from nursing. Humans can be infected by the virus as well as act as vectors transmitting the virus from one animal to another so extreme care should be taken to use protective gloves when handling affected animals.49,50

Animals usually show immunity for 2 to 3 years after a clinical case of orf although some may show clinical signs 1 year after disease. Lesions are usually milder and respond more quickly during subsequent infections.36 Eighteen outbreaks of orf over 4 years in India (6 sheep, 12 goat) had morbidity rates of 18.93% for goats and 21.50% in sheep while mortality rates were 2.53 and 1.10% in those species, respectively. Kids were more likely to have lesions on the gums and tongue than older animals.51 Contagious ecthyma is endemic in northeastern Brazil.52 One lamb flock affected by an orf outbreak in addition to the signs of crusty nostrils, lips, and muzzle had significant facial swelling with pitting edema. The disease ran its course but the healed animals showed some hair loss at the sites of the facial edema.53 While most cases of orf have healing of the clinical lesions in weeks there is a report of sheep showing clinical signs for as long as 6 months. The scabs of the chronic form were well adhered to the skin and caused bleeding when removed.54

One survey of 48 goat flocks in Argentina found that 81.2% identified contagious ecthyma as an infectious disease problem on the premises.55 There has been a report of orf in five sheep from three flocks in the United States that exhibited proliferative skin lesions on the limbs that were painful to touch and caused the sheep to be reluctant to move. The lesions did not spontaneously resolve as is the case with most cases of orf. The disease also appeared to be less contagious than classic orf in sheep. All these animals were euthanized after lack of response to imperative treatment with antibiotics and topical medications, or spontaneous resolution of signs. This stresses that while this disease is usually diagnosed on clinical signs and course of disease, not all cases are classic.56

Contagious ecthyma has been reported in several species of cervidae and there are case reports of human disease (orf) that have been contracted from exposure to cervidae.29 Pox virus has also been reported from white-tailed deer in Florida.29 Diagnosis is rare and treatment is limited to benign neglect unless secondary bacterial infection is suspected, in which case systemic antibiotics may be helpful. Prevention through vaccination may be helpful in affected herds, but proof of disease and the subsequent use of either sheep vaccine or an autogenous vaccine should be carefully considered before implementing.

13/09/2022

Management/Prevention/Control measures
Disease is introduced into a flock by carrier sheep with no obvious skin lesions. Infection can remain viable in dry scab material in buildings for many months and is the likely reason for persistence of infection from year to year on the same premises. Thorough cleaning and disinfection of lambing accommodation may therefore help to break the usual annual appearance of disease.
Control following scarification with a live vaccine proves difficult to quantify but is routinely undertaken in many flocks in the UK. Vaccine must never be used in a flock with no history of CPD. Vaccination is by scarification of the inner thigh in lambs and the axillary region in ewes. The timing of vaccination is approximately 6 weeks before the anticipated occurrence of disease. Care must be exercised during handling the live vaccine as it is affected by high temperatures and inactivated by disinfectants.

Orf is an acute contagious and economically important zoonotic viral skin disease of sheep, goat, and wild ruminants cau...
13/09/2022

Orf is an acute contagious and economically important zoonotic viral skin disease of sheep, goat, and wild ruminants caused by orf viruses. Infected animal is sick, fail to thrive and susceptible to bacterial infections. Characteristic of the disease are proliferative and often self-limiting lesions on the skin of the lips, on the oral mucosa and around the nostrils. The mortality rate related to orf is usually low, but it may be very high when bacterial or fungal secondary infections occur. Three kids with comparable age group of six months were affected with orf in Sheep and Goat Farm, Livestock Research Station, Assam Agricultural University, Mandira. The affected kids developed fever, dull, depressed and lesions on nostrils, lips and inside the mouth. Affected goats was isolated from other healthy goats. Lesions were wiped with potassium permanganate solution. Affected goats was treated intramuscularly with Inj. Enrofloxacin @ 5mg/kg body weight, Inj. Meloxicam @ 0.5 mg/kg body weight and Inj. Chlorpheniramine maleate @ 0.5 mg/kg body weight. An ethno veterinary medicine, comprised of aloe vera gel and turmeric powder in the ratio of 1:1 was mixed and applied over the lesions twice daily. There was complete recovery within one week of treatment

How do I treat skin fungus or ringworm in my goats?Isolate the goat and treat early and aggressively. Clip the hair, rem...
13/09/2022

How do I treat skin fungus or ringworm in my goats?
Isolate the goat and treat early and aggressively. Clip the hair, remove any scales/crust, scrub with Nalvasan or Betadine, apply topical antifungals often, and continue for up to six weeks. Be sure to disinfect all equipment and the area daily. You may need to use a systemic antibiotic like Penicillin G or Nulfor (extra label use by a veterinarian) if the fungus is deeper than the skin only. In some cases, a systemic antifungal drug is needed, and these will have a long withdrawal time. Remember that a skin fungus is contagious to humans and hard to treat. Take precautions. Consult your veterinarian when using any medications on goats.

Treatment and ControlTopical and systemic antibiotics, along with husbandry changes to keep the animal dryIt was previou...
13/09/2022

Treatment and Control
Topical and systemic antibiotics, along with husbandry changes to keep the animal dry
It was previously thought that because acutely infected animals usually heal rapidly and spontaneously, treatment was indicated only for cosmetic reasons in food-producing animals. However, in certain parts of the world, the disease is associated with significant morbidity and mortality, loss of body condition, decreased milk production, and increased somatic cell counts in milk. Treatment is recommended in horses because the lesions interfere with use and are painful.
Organisms are susceptible to a wide range of antimicrobials: erythromycin, spiramycin, penicillin G, ampicillin, chloramphenicol, streptomycin, amoxicillin, tetracyclines, and novobiocin. In food-producing animals, topical applications of lime sulfur are a cost-effective adjuvant to antibacterial therapy. Insecticides applied externally are frequently used to control biting insects.
In horses, the lesions should be gently soaked and removed. Topical antibacterial shampoo therapy is effective as adjuvant therapy. Chlorhexidine is recommended and is not irritating.
Isolating clinically affected animals, culling affected animals, and controlling ectoparasites are methods used to break the infective cycle. Preventing chronic maceration of the skin and keeping the animals dry are important. Zinc levels should be checked in the feed of cattle, because outbreaks have been associated with zinc deficiencies.

Dermatophilosis is a bacterial infection of the skin of animals. It is prevalent worldwide and is caused by Dermatophilu...
13/09/2022

Dermatophilosis is a bacterial infection of the skin of animals. It is prevalent worldwide and is caused by Dermatophilus congolensis. Cattle, sheep, goats, and horses are affected most frequently, and pigs, dogs, and cats rarely. Lay terms for this disease include "lumpy wool" and "Strawberry foot rot (for infections on the feet)." Recent isolates from sea turtles may represent a new species of Dermatophilus. It is also a common disease in farmed crocodiles and has been reported in polar bears. The few human cases reported usually have been associated with handling diseased animals.

22/08/2022

Orf vaccine contains live virus so must be administered with extra care. It is important that vaccinated animals do not come into contact with unvaccinated animals for at least 7 days, and the vaccine should NEVER be used on farms with no previous cases of orf

Orf can affect sheep of all ages and has serious welfare implications. It causes scabs and lesions usually in the mouth ...
22/08/2022

Orf can affect sheep of all ages and has serious welfare implications. It causes scabs and lesions usually in the mouth area, but can affect udders and feet as well. There isn’t a cure to get rid of the virus once it has become established in the animal; however, the secondary infections can be treated. This image is sourced from www.msd-animal-

Treating OrfAt present there is no practical means of killing the virus once it is established in the animal, although t...
22/08/2022

Treating Orf
At present there is no practical means of killing the virus once it is established in the animal, although there is some experimental evidence of a reduction in lesion severity with an antiviral drug (Scagliarini et al., 2008). However, orf is a self-limited disease and symptomatic treatment with dressings and local antiseptics are very helpful. Where secondary bacterial infections in animals with orf are common, topical and systemic antibiotics can be used in the treatment schedule (Nandi et al., 2011). In ewes with severe teat lesions, they can be treated with a local treatment of tetracycline (Burriel, 1997). Where possible, scabs that have been shed from lesions should be removed and incinerated.
Treatment of the scabby lesions with herbal remedies may help. Of these, plant oils obtained from sesame, castor, juice of Calotropis procera and Euphorbia spp. have been found to be effective in the treatment of orf infection in India and African subcontinents. Whereas in France and Netherlands, Ilex aquifolium is used for curing and preventing contagious ecthyma (Nandi et al., 2011).
Attention to feeding may prevent severe weight loss and debilitation in animals, especially in lambs having difficulty with sucking.

Control and Prevention of OrfLower stocking rates and outdoor lambing may help to prevent serious outbreaks of orf becau...
22/08/2022

Control and Prevention of Orf
Lower stocking rates and outdoor lambing may help to prevent serious outbreaks of orf because it is highly contagious and is transmitted readily from animal to animal. Disease can be introduced into a flock by carrier sheep with no obvious clinical signs, therefore a closed flock policy reduces the risk of the disease.

Lambs and ewes in shed
High stocking rates, and indoor lambing are considered to be risk factors for the spread of the orf virus. The virus can survive in dry cool areas for years so thorough cleaning and disinfection between batches is essential.

Live orf vaccines are available, which are prepared from infectious scab material (Nettleton et al., 1996b). These vaccines are applied by scarification and cause mild Orf lesions. However, protection is not lasting, although outbreaks that follow vaccination are milder and of short duration.

Vaccination can be useful in the face of an outbreak of the disease as a means of artificially infecting all animals and ensuring that they experience only mild disease. Vaccination of replacements bought into flocks already infected with orf may also be useful. As the scabs shed from vaccinal lesions contain live virus and contaminate the environment, vaccines should never be used unless there is a known problem with orf. Vaccinated ewes should not be allowed access to the lambing area until all scabs are shed (Reid, 1991).

If an orf outbreak occurs disinfection of buildings is essential. The building should be thoroughly cleaned before applying the disinfectant. Orf virus is susceptible to most disinfectants. Exposure to 3% iodophor solution or 1% formaldehyde will kill the virus, however iodophor disinfectants are expensive, and specific clothing and respirators are required when using formaldehyde. Hypochlorite solution is one of the disinfectants recommended by the World Organisation for Animal Health (OIE), however it is rapidly inactivated by the presence of organic matter so cleaning before disinfecting is required (Gallina and Scagliarini 2010). Particular attention should be paid to cleaning in and around pen divisions and feeding troughs.

Survival of the virus between outbreaks is thought to be in the form of virus contained in scabs. It can survive under c...
22/08/2022

Survival of the virus between outbreaks is thought to be in the form of virus contained in scabs. It can survive under cool, dry circumstances for years. The virus has been found to survive for up to 17 years in environments with dry climate and remain viable on the wool of animals and contaminated material for significant periods (Spyrou and Valiakos, 2015), but has been found to lose its infectivity quickly in cold, wet circumstances (McKeever and Reid, 1986). An alternative source of infection may be the existence of chronic orf infections of sheep (McKeever, 1984; Nettleton et al., 1996a).

Sheep that have recovered from infection have only limited protection against reinfection, although subsequent infections tend to be milder and more short-lived than the initial one (McKeever et al., 1988). Antibodies are produced against the virus, but even when present in large amounts they seem to have little effect on the course of the disease (Greig et al., 1984; Yirrell et al., 1989).

Infection spreads rapidly through the flock, with most animals becoming infected within a few weeks. Outbreaks can be pa...
22/08/2022

Infection spreads rapidly through the flock, with most animals becoming infected within a few weeks. Outbreaks can be particularly severe in housed sheep due to the high stocking rate. Contaminated livestock trailers may also be a source (Gumbrell and McGregor, 1997). Outbreaks usually last for between 6 and 8 weeks, and generally do not reappear until there is a fresh crop of susceptible lambs.

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