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Foot Pad Dermatitis Associated with Osteomyelitis in a Mute Swan (Cygnus Olor)

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Foot Pad Dermatitis Associated with Osteomyelitis in a Mute Swan (Cygnus Olor) American Journal of Animal and Veterinary Sciences Case Report Foot Pad Dermatitis Associated with Osteomyelitis in a Mute Swan (Cygnus olor ) 1Alireza Jahandideh, 2Reihaneh Manouchehri, 2Shiva Jahanshiri and 2Manely Ansari 1Department of Clinical Sciences (Surgery), Faculty of Specialized Veterinary Sciences, Science and Research Branch, Islamic Azad University, Tehran, Iran 2Department of Clinical Sciences, Faculty of Specialized Veterinary Sciences, Science and Research Branch, Islamic Azad University, Tehran, Iran Article history Abstract: A Captive mute swan with swelling abscesses in foot pads of Received: 29-01-2018 both legs was presented. A complete blood count reveals systemic Revised: 9-04-2018 infection. Radiographs showed radiopaque areas in foot pad of both legs Accepted: 04-05-2018 and osteomyelitic periosteal reaction in left foot. After anesthesia, surgical Corresponding Author: debridement was carried out to remove pus and necrotic tissue on the Alireza Jahandideh plantar surface of both feet. Full surgical debridement, effective antibiotics, Department of Clinical Science good post-surgical care and husbandry are affecting factors that cause no (Surgery), Faculty of recurs of disease despite osteomyelitis. Specialized Veterinary Sciences, Science and Research Keywords: Mute Swan, Cygnus olor , Bumblefoot, Ostemyelitis, Branch, Islamic Azad University, Tehran, Iran Staphylococcus aureus Email: [email protected] Introduction spp., Klebsiella spp., Clostridium spp., Corynebacterium spp., Bacillus spp., Diplococcus spp., Nocardia spp., Mute swan originated from Europe and central Asia. Actinobacillus spp., Actinomyces spp., Aeromonas spp., This extremely elegant bird has been introduced as an Proteus spp. and Pseudomonas spp. have been ornamental species in many other parts of the world (Burnie, 2011). Adult swans are truly massive flying interlaced. Candida spp. and Aspergillus spp. may also birds. They can be 1.6 m in length (half of which is be included in some cases (Doneley, 2010). neck) and can have a wingspan well in excess of 2 m. Adult birds weight from 6 kg upwards. Female birds Case History rarely overshoot 10 kg but an adult male may weigh up to 14 kg (Routh, 2000). A Captive mute swan weighting 8.5 kg with swelling Foot Pad Dermatitis (FPD) or plantar pododermatitis abscesses in foot pads of both legs was presented to the is also recognized as bumblefoot. It refers to an inflamed Islamic Azad University (IAU) specialized veterinary and often infected lesion on the plantar surface of the polyclinic (Fig. 1). On physical examination the keel was foot. It is most commonly seen in raptors, but may be difficult to palpate and the bird was found to be in good seen in other species. It is a disease of captivity, being body condition but a little bit depressed. The swollen rare or nonexistent in wild birds (Doneley, 2010). abscesses cause inability to walk in the swan. Cloacal Parenteral antibiotics may be necessitated if the temperature was 40°C and dehydration was not remarkable. masses grow infected, but the underlying condition will A complete blood count reveals systemic infection persevere because of the environmental factors (Routh, with an increase in leukocytes (heterophilia, 2000). The condition has been reported in other birds, monocytosis accompanied with lymphopnea). including raptors, falcons, eagle, geese, owls, gannet, penguins (Rodriguez-Lainz et al ., 1997; Müller et al ., Radiographs of both legs obtained. These showed 2000; Poorbaghi et al ., 2012; Parsad et al ., 2010; Gentz, radiopaque areas in foot pad of both legs and 1996; Daoust et al ., 2000; Reidarson et al ., 1999) To the osteomyelitic periosteal reaction in left foot (Fig. 2). author’s lore this is the first report of bumblefoot Anesthesia was induced with xylazine 2% (0.3 mg/kg associated with osteomyelitis in mute swan. Alfasan, Netherlands) and ketamine 10% (12 mg/kg FPD are usually a consociated with Staphylococcus Alfasan, Netherlands) intravenously. Then swan aureus , but other bacteria containing E. coli , Pasteurella intubated with a cuffed endotracheal tube and a single © 2018 Alireza Jahandideh, Reihaneh Manouchehri, Shiva Jahanshiri and Manely Ansari. This open access article is distributed under a Creative Commons Attribution (CC-BY) 3.0 license. Alireza Jahandideh et al . / American Journal of Animal and Veterinary Sciences 2018, 13 (2): 66.69 DOI: 10.3844/ajavsp.2018.66.69 dose of atropine (0.04 mg/kg Dicatro®, Caspian Co., Post surgical treatment was initiated with 50 mg/kg, 2 Iran) injected intramuscularly to make sure that the tube times daily, IM Clindamycin (Darou Pakhsh Co., Iran) does not become blocked with tracheal secretions. for 3 days and continued with 50 mg/kg, 2 times daily, Isoflurane (5%) used for inhalation anesthesia. PO Clindamycin (Darou Pakhsh Co., Iran) for 11 days Surgical plan to amputate osteomyelitic bone more. Additional supportive treatment included injection of 1 mL of Vitamin AD3E (Eurovet, Netherlands) and recommended, but owner refused amputation. The 0.7 ml of Vitamin B1, B6, B12 (Neurobion®, Merck, wound prepared aseptically and surgical debridement Germany) intramuscularly. The results of laboratory was carried out to remove pus and necrotic tissue on the culture and isolation from drained pus demonstrated plantar surface of both feet. Sample of the abscesses was Staphylococcus aureus as of infectious organism in the collected aseptically and send for culture. Surgical bumblefoot and osteomyelitis. dressing and bandage used to minimize pressure on After 14 days of treatment with Clindamycin a digital foots and Clindamycin 1% topical gel (Iran Najo second blood sample revealed a normal Complete blood Co. Tehran, Iran) also applied to plantar surface of both count and wound healed successfully. It was suggested legs. Oxygen supplementation for several minutes used to owner to use softer substrate and enforce more time for recovery and then extubated. on the water to avoid recurrence of FPD. Fig. 1: Bumblefoot in a Mute Swan Fig. 2: A. dorso-plantar radiograph of right foot illustrating radiopaque area of plantar pododermatitis 67 Alireza Jahandideh et al . / American Journal of Animal and Veterinary Sciences 2018, 13 (2): 66.69 DOI: 10.3844/ajavsp.2018.66.69 Discussion happening of FPD. About FPD in broilers and turkeys, we know, litter material and depth is an important area of FPD is a common husbandry condition of captive- research for the understanding and prevention of FPD reared birds characterized by local injury to the (Shepherd and Fairchild, 2010). integument of the foot (usually the digital or plantar In birds of prey, eagles and buteos were the species metatarsal pads). Symptoms include scab formation, most affected by FPD. Their occurrence rates were thickenings, swellings, inflammation and ulcerative significantly higher than those of other species; the lesions of the subcutaneous tissues of the foot pads and, in median duration of bumblefoot was two to five times extreme cases, distortion of the digits and septic arthritis of greater for these species (Rodriguez-Lainz et al ., 1997). the joints and osteomyelitis (Reissig et al ., 2011). In Müller et al . (2000) research in wild and captive- The etiology of FPD includes a complex of bred falcons, diet shows a significant influence on the environmental, host and bacterial components (Oaks, occurrence of FPD. Especially the wild falcons tested 1993). Potential or known predisposing factors contain showed a reduced morbidity rate when fed pigeons, species, trauma to the feet, poor nutritional status, bustards and ducks, which resemble their usual prey. deficiencies in vitamin A or vitamin E, heavy parasite In contrast to this, captive-bred falcons are often fed load and poor hygiene (Halliwell and Graham, 1986; Remple and Al-ashbal, 1993). with low-energy food like beef as part of their FPD is a common condition in broilers and turkey. nutrition plan, resulting in a significant decrease of Some factors affect incidence of this problem, as FPD cases (Müller et al ., 2000). Shepherd and Fairchild (2010) discussed, environmental Remple and Al-Ashbal (1993) stated that, the factors, food and nutritional deficiencies, sex and body incidence of bumblefoot in free-living raptors is size could affect broilers and turkeys. considered to be lower than in captive birds-probably In environmental factors, one thing that is common because wild birds are more active, have more control among most previous research is that litter moisture is a over landing impact and have a choice of perching significant factor in the onset of FPD. Continually surfaces with a variety of textures. standing in wet litter will reason the footpad to soften There is little information available about incidence and become more prone to damage, predisposing the of FPD in waterfowl. But occurs most commonly in larger species such as swans due either to chronic wear, bird to developing FPD. Drying out the litter and moving pressure and abrasion (especially when birds have to birds from wet litter to dry litter was remarked to reverse walk on hard surfaces such as concrete or tarmac) or the severity of FPD (Shepherd and Fairchild, 2010). following crash Landing on tarmac surfaces as can occur As a second environmental factor, season could when birds confuse the shimmering surface of a road for affect the incidence of FPD in broilers. According to a water surface (Humphreys, 1996). Mayne (2005), higher incidences of hock and breast In this reported
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