Clinical observations on bovine parasitic otitis in Tanzania

Msolla, P.; Semuguruka, W. D.; Kasuku, A. A.; Shoo, M.K.

doi:10.1007/bf02236880

Cited by 23 publications

(31 citation statements)

References 5 publications

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“…O lacrimejamento apresentado pelos bovinos do presente estudo pode ser explicado pela ação irritativa das lavas de R. blumi (Fig.5) encontradas no saco conjuntival, o que está de acordo com a hipótese levantada por Campos et al (2009). Com relação à forma de transmissão foi aventada a possibilidade da migração das larvas presentes do cerume da região periauricular para o olho (Msolla et al 1993, Verocai et al 2007, Abdalla et al 2008, Campos et al 2009). Não descartamos o papel das moscas no transporte das larvas do parasita para o globo ocular, como também já foi mencionado por Msolla et al (1986).…”

Section: Resultsunclassified

“…De acordo com Msolla et al (1993), Abdalla et al (2008) e Campos et al (2009, os sinais clínicos nervosos observados no presente estudo são característicos de uma otite interna já agravada e com comprometimento do sistema vestibular e do nervo facial, consequente de uma evolução clínica acima de seis meses.…”

Section: Resultsunclassified

“…Os bovinos podem ficar apáticos, demonstrar desconforto, balançar de cabeça e tendem a coçar as orelhas com as patas, nas instalações ou em outros animais. Nas otites internas, os sinais clínicos são semelhantes aos da otite média, acrescentados de sintomatologia nervosa devido à evolução para uma síndrome vestibular, caracterizada por nítido rotacionar da cabeça, apatia mais evidente, incoordenação, salivação, problemas de mastigação e acúmulo de alimento na cavidade oral (Msolla et al 1993, Verocai et al 2007, Abdalla et al 2008, Campos et al 2009, Leite et al 2010, Rezende 2010.…”

Section: Introductionunclassified

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Detecção e tratamento de otite por Rhabditis blumi em bovinos da região Norte do Brasil

et al. 2016

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RESUMO.-O presente estudo teve como objetivo descrever a ocorrência de otite parasitária causada por Rhabditis blumi em bovinos leiteiros de raça Gir de uma fazenda da região Norte do Brasil. Foram coletadas amostras de 42 bovinos por swab e lavado dos condutos auditivos externos (CAE). Ao exame clínico, 9,5% (4/42) dos bovinos apresentavam sintomatologia nervosa, como leve a moderada rotação da cabeça, apatia, flacidez dos lábios e ptose palpebral This study aimed to describe the occurrence of parasitic otitis caused by Rhabditis blumi in dairy cattle of the Gir race from a farm in northern Brazil. Forty-two samples were collected from cattle by swab washed from the external auditory canal (EAC). On clinical examination, in 71.4% (30/42) of the cattle the parasite was found in the cerumen of the ear canal, along with alopecia of head and hump caused by discomfort and itching of the auricular region. At microscopic analysis of material from the conjunctival sac the parasite was found in 90% (9/10) of the evaluated cattle. In addition, 9.5% (4/42) of the cattle showed nervous symptoms, such as mild to moderate rotation of the head, apathy, flaccid lips and unilateral ptosis, change in chewing and food accumulation in the oral cavity. Thirty cattle positive for Rhabditis spp. were randomly divided into three groups of 10 animals each: (G1) Cattle Control, (G2) Cattle treated with ivermectin 1% pour-on, and (G3) Cattle undergoing wash of the external auditory canal (EAC). Each treatment was repeated three times with intervals of seven days. In G1, 10 cattle remained infected throughout the study. In G2, 20% of the cattle were negative after the first two treatments, however were positive at the third evaluation. In G3, all cattle remained positive, but with decrease in parasite load. Identification by molecular analysis of amplified fragments through the expansion D2/D3 28S rDNA confirmed the presence of only Rhabditis blumi. Based on clinical, morphologic and molecular examination, it appears to be the first report of the occurrence of R. blumi infection in Gir cattle in the State of Pará, due to the purchase of cattle from areas where parasitic otitis has been diagnosed, as from Minas Gerais, to produce crossbred animals (Gir x Holstein). This emphasizes the importance of prior clinical examination by the veterinary service in order to transfer only healthy animals to other properties or regions. This appears also to be the first report on R. blumi infection of the conjunctival sac in cattle. Treatment with ivermectin in G2 did not produce clinical improvement.

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Section: Resultsunclassified

Section: Introductionunclassified

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Detecção e tratamento de otite por Rhabditis blumi em bovinos da região Norte do Brasil

et al. 2016

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“…Les méningites et/ou encéphalites purulentes sont fréquemment la conséquence d'une bactériémie et sont caractérisées par une alternance de signes cliniques correspondant à une période initiale d'excitation, suivis de signes cliniques correspondant à l'arrêt des fonctions (11,93). Par contiguïté de tissu, une sinusite (écornage, bris de corne ou de dent) ou une otite peuvent induire des TEN (70,109). L'entérotoxémie, qui est moins fréquemment rencontrée chez le bovin adulte, peut également induire des TEN dans la forme subaiguë (6,11,100).…”

Section: Maladies D'origine Bactérienneunclassified

Diagnostic différentiel des troubles à expression nerveuse dans l’espèce bovine en Europe occidentale

Saegerman

Claes²,

Dewaele³

et al. 2003

Rev. Sci. Tech. OIE

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IntroductionL'incidence des troubles neurologiques chez la bête bovine est peu connue à l'échelle de la population et les résultats disponibles sont peu comparables. Ces données sont pourtant de toute première importance pour l'épidémiosurveillance des encéphalopathies subaiguës spongiformes transmissibles (124). Un pourcentage relatif de 0,82 % de pathologies neurologiques a été mentionné parmi l'ensemble des pathologies rencontrées en pratique vétérinaire (65). En Suisse, l'incidence annuelle minimale des cas neurologiques examinés dans les universités Rev. sci. tech. Off. int. Epiz., 2003, 22 (1), 61-82 RésuméUne classification des troubles neurologiques ou à expression nerveuse susceptibles d'être rencontrés en Europe occidentale chez les bovins âgés de 12 mois et plus a été établie selon l'étiologie, la fréquence et les conditions d'apparition, l'âge et le type d'animaux concernés et les principaux signes cliniques observés. Les troubles à expression nerveuse ont été classés selon les différents groupes de causes : biologiques, non biologiques et non spécifiques ou inconnues. Le diagnostic différentiel des troubles à expression nerveuse est un élément essentiel de l'épidémiosurveillance clinique de l'encéphalopathie spongiforme bovine. Un nombre croissant d'étiologies est décrit dans la littérature scientifique. L'identification et la gestion centralisée des troubles neurologiques permettront, d'une part, de tenir compte de la variabilité inhérente à la forme clinique développée et à la démarche diagnostique de l'observateur et, d'autre part, d'identifier de nouveaux facteurs de risque permettant leur maîtrise. Mots-clésBovin -Cause biologique -Cause non biologique -Cause non spécifique -Encéphalopathie spongiforme bovine -Europe -Trouble neurologique. Diagnostic différentiel des troubles à expression nerveuse dans l'espèce bovine en Europe occidentale, L. Claes (2) , A. Dewaele (3) , D. Desmecht (3) , F. Rollin (5) , J. Hamoir (6) , P. Gustin (6) , G. Czaplicki (7) , J. Bughin (7) , J. Wullepit (2) , J. Laureyns (8) , S. Roels (9) , D. Berkvens (10) , E. Vanopdenbosch

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“…Severely affected animals are usually apathetic and without appetite, showing constant head movement. Clinical signs also include purulent and fetid otorrhea (which predisposes to myiasis) in addition to nervous symptoms such as facial hemiplegia, which profoundly affects food apprehension and mastication, thus drastically reducing weight gain (Msolla et al 1993, Verocai et al 2007. While in Africa the parasite was identified in most of the cases as Rhabditis bovis, in Brazil four different species were described parasitizing the ear canal of cattle, including R. freitasi e R. costai (Martins-Junior 1985).…”

Section: Introductionmentioning

confidence: 99%

Inefficacy of albendazole sulphoxide and ivermectin for the treatment of bovine parasitic otitis caused by rhabditiform nematodes

et al. 2009

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910Pesq. Vet. Bras. 29(11):910-912, novembro 2009 RESUMO.-[Ineficácia do sulfóxido de albendazole e da ivermectina no tratamento da otite parasitária bovina causada por nematóides rhabditiformes.] O objetivo deste estudo foi avaliar a eficácia do sulfóxido de albendazol administrado oralmente e da ivermectina "pour-on" no tratamento da otite parasitária bovina causada por nematóides rhabditiformes. Dezoito vacas Gir apresentando otite clínica foram divididas em três grupos de seis animais cada. O primeiro não recebeu tratamento (grupo controle). O segundo foi tratado com ivermectina "pouron" a 0,05% na dose de 500μg/kg de peso vivo. O terceiro grupo foi tratado com sulfóxido de albendazol oral a 6% na dose 6,0mg/kg. Os condutos auditivos de todos os animais foram reexaminados nos dias 7 e 21 pós-tratamento. Os animais do grupo controle permaneceram infectados nos dias de observação. O tratamento com ivermectina não demonstrou eficácia alguma para os dias 7 e 21 pós-tratamento. O tratamento com sulfóxido de albendazol obteve 16,7 e 25% de eficácia nos dias 7 e 21, respectivamente. Mais estudos são necessários para determinação de tratamentos eficazes para tal doença parasitária, especialmente através de vias alternativas de administração, por causa de seu significante impacto na criação de Bos taurus indicus nas Regiões Tropical e Subtropical. The purpose of this study was to evaluate the efficacy of orally administered albendazole sulphoxide and pour-on ivermectin for the treatment of bovine parasitic otitis caused by rhabditiform nematodes. Eighteen Gyr cows presenting clinical otitis were divided in three groups with six animals each. The first one did not receive any treatment (control group). The second one was treated with 0.5% pour-on ivermectin, 500μg/kg of body weight, and the third group was treated with oral 6% albendazole sulphoxide, at 6.0mg/kg. Both ear canals of each animal were reexamined on days 7 and 21 post treatment. The animals in the control group remained infected throughout the days of observation. Ivermectin treatment did not show effectiveness on days 7 or 21 post treatment. The albendazole sulphoxide treatment had an efficacy of 16.7 and 25% on days 7 and 21, respectively. Further studies are required to assess an effective treatment for this parasitic disease, especially via alternative administration routes, because of its significant impact on Bos taurus indicus cattle breeding in Tropical and Subtropical Regions. Inefficacy of albendazole

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Clinical observations on bovine parasitic otitis in Tanzania

Cited by 23 publications

References 5 publications

Detecção e tratamento de otite por Rhabditis blumi em bovinos da região Norte do Brasil

Detecção e tratamento de otite por Rhabditis blumi em bovinos da região Norte do Brasil

Diagnostic différentiel des troubles à expression nerveuse dans l’espèce bovine en Europe occidentale

Inefficacy of albendazole sulphoxide and ivermectin for the treatment of bovine parasitic otitis caused by rhabditiform nematodes

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