PDF | En los bovinos, los dermatofitos producen un impacto negativo en la cría de ganado y pueden causar zoonosis. El objetivo de este. Se realizó un estudio retrospectivo de la dermatofitosis cutánea bovina a través de los registros clínicos entre junio de y junio de del Servicio Clínico. Frequency of dermatophytosis in bovine (Bos indicus) of Córdoba Department, Colombia. Foreign Title: Frecuencia de dermatofitosis en bovinos Bos indicus.
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Yeasts isolated from beef heifers with ringworm. Levaduras aisladas de terneras de carne con dermatofitosis.
Hubo diecinueve aislamientos de Trichophyton spp. Bovine dermatophytosis has a negative impact in cattle breeding and can cause zoonoses. The aim of this study was to report a ringworm outbreak in Brazil and bovinks evaluate the presence of yeast in the lesions. After weaning, 88 dermatofitosls beef heifers in feedlot were clinically investigated. Lesions dermatovitosis of ringworm were observed in Hyaline hiphae were observed in Skin scrapings from 27 heifers with ringworm were inoculated Sabouraud dextrose agar and Mycosel Agar.
Nineteen isolates dermatofitsis Trichophyton spp. Yeasts were isolated from 24 heifers The meaning of these yeast species in the aetiology and pathogeny of bovine dermatophytosis may be evaluated in further epidemiological investigations.
Mycelial fungi of the species Trichophyton verrucosumMicrosporum canis and Microsporum gypseum are causative agents of dermatophytosis or ringworm in animals and humans worldwide. Dermtaofitosis reservoirs are cattle, cats and soil, respectively Cutsem and RochetteHainerPapini et al Recently, a cattle farmer has been evaluated with an extensive erythematous plaque that failed to respond to antibacterial treatment. History revealed that his cows were being treated for ringworm and his diagnosis was confirmed by skin biopsy demonstrating fungal elements and culture yielding T.
Furthermore, a case of mycozoonosis associated with T. Thus, the bovine dermatophytosis, namely bovine ringworm, is encountered as an outmost important manifestation for animals and humans in veterinary and medical practice.
The dermatophytes can persist during long periods in the environment and can spread within the herds. Lesions can be found all over the body, but most frequently on the bovinoe, around the eyes, on the forehead and near the ears Cutsem and RochetteGudding and Lund In Brazil, few scientific studies deematofitosis described the occurrence of bovine dermatophytosis Silveira et al In degmatofitosis, there are few investigations on the presence of yeast communities associated with dermatophyte lesions in animals Cutsem and RochetteLacaz et al The purpose of this study was to describe a ringworm outbreak in heifers raised in Minas Gerais State, Brazil, and to evaluate the yeast species associated with this skin disease.
The presence of smell, itching, increases in volume, dermatoditosis, alopecia, excoriations and crust formations were evaluated through clinical examinations of the skin. The mycological direct exams were carried out in specimens from all heifers with lesions suggestive govinos ringworm 84 of 88 animals. Skin scales were collected by scraping of the lesion margin using a sterile scalpel blade into sterile petri dish. Hairs were collected by removing dull dermatpfitosis hairs from the lesion margin using sterile tweezers.
Cultures were evaluated to aliquots specimens from 27 animals with disseminated skin lesions of ringworm figure 1 and positive KOH test. Mycelial isolates were identified using microculture technique. Micromorphological characteristics were observed dermatofittosis the light of the optical microscope and compared with fungi structures.
Urea hydrolysis was performed culturing Trichophyton isolates on Christensen’s solid medium and Dermatophyte Agar. The growth on basal medium with inusitol or thiamine was also considered for identification of these isolates RipponLacaz et al Dermatophytes and other fungi were identified according the keys of De Hoog et al Subsequently to the growth, up to three different yeast colonies were drematofitosis to each animal plate and were identified considering the micromorphological and biochemical tests according to the taxonomic keys presented in Kurtzman and Fell The ringworm suggestive animals were isolated from the healthy cattle and moved to pastures with one animal unit per hectare, without confinement stress.
The occurrence of typical ringworm lesions figure 1 was observed in 84 animals The heifers were weaned and confined at the end of the dry period and the lesions appeared three weeks after the weaning, rapidly spreading among the cattle. Alopecia and circular crust formation started around the eyes, heads and neck, 38 heifers also showed skin lesion throughout the entire body. The animals with ringworm were separated from the rest of the cattle and were moved to pastures without confinement stress.
They were treated with daily topical PVP-iodine application for a week which reduced lesions significantly within two months after treatment.
In dermatofitossis report, high morbidity to lesions suggestive of ringworm was observed in a bovine beef livestock, corresponding to The animals were young and were confined in high density just after weaning, from August to September.
In this period, the first rains arrived and air humidity increased. These conditions suggest that stress, intense physical contact, higher temperature and humidity favoured the high ringworm occurrence. During the same period, similar lesions were not observed in adult cows grazing on extensive pastures, suggesting that confinement, pre-weaning dermatoftosis immaturity were the ringworm promoting factors in this farm.
According to Gudding and Lundthese factors should be controlled or considered in order to prevent the rapid spread of the disease. The transmission ne occurrence have been favoured by large scale productions that may cause lack of individual animal care. The constant introduction of new animals from other farms in livestock em contribute to the dermatophyte spread.
Dermatofitosis en animales by Marina Velasco on Prezi
bovinoa Livestock in restricted areas with high bovine density promotes the dissemination of the disease due to the increased physical contact Cutsem and RochetteGudding and Lund Culture test showed presence of Trichophyton spp. The most frequent species was Trichophyton verrucosum. Among the saprophytic fungi, the genus Fusarium was the most detected table 1.
The higher rate of isolates of the genus Trichophyton Among the identified isolates, Trichophyton verrucosum is the main agent in bovine ringworm and is frequently related edrmatofitosis temperate regions Gudding and LundPapini et al Studies evaluated the presence of Trichophyton spp. Trichophyton verrucosum was isolated in The highest occurrence was also reported in younger boivnos during autumn and winter Silveira et alOzkanlar et al In Japan, the isolation of t.
This species was also isolated in These results suggested that the contact with areas with or without lesions from sick animals could spread the fungus to other animals Takatori et al Other studies have also reported the occurrence of T.
In the Greece, an reported outbreak was caused only by T. In mycological studies in the India, cattle with typical ringworm lesions revealed the presence of four t. Another research, also carried out in India, evaluated 21 cattle with these lesions and showed the presence of two Dermatofitosi.
These studies and the data from this report suggest that other dermatophytes besides T. Future studies should also dn the presence of the genus Aspergillus, Acremonium, Fusarium and Rhizopus which were identified in this study table 1considering that these fungi can be contaminants, saprophytes or opportunists RipponLacaz et al Takatori et bocinos isolated airborne fungi of the genus Aspergillus, Alternaria, Penicillium and Cladosporim from calves with ringworm without implications in the lesions.
Positive cultures to yeasts were observed in 24 heifers The physiological and biochemical identification showed the presence of Candida C.
Other yeast isolates were identified as C. Cultures from ten animals indicated concomitant infections with different yeast species table 2. The genus Malassezia was not isolated in the evaluated animals.
There are no scientific reports describing the association of these species in dermatophytosis. The high occurrence suggests that further research, examining the role of these and other yeasts in the pathogenesis of bovine ringworm are required.
Same yeast of this genus can produce queratinases, lipases and proteases or other enzymes Duarte et alWawron et alaggravating the ringworm. Further investigation is needed to evaluate the association of this yeast tougher dermatophytes.
Candida lusitaniae has been isolated from several cases of disseminated nosocomial candidiasis in humans. This species frequently shows resistant to amphotericin B and the detection from milk of cows with mastitis also has been reported RipponKurtzman and FellWawron et al Species of the Candida and Rhodotorula genera are members of the normal microbiota of warm-blooded animals and have been isolated from external bovine otitis Duarte et al The high dermatophytosis occurrence observed in these young heifers strengthens their monitoring importance and indicates the need for preventive measures such as reduction of stress during the weaning period and rearing in feedlots.
Skin lesions on the face of a kid
The role of the yeast species identified in this research may also be considered in new studies of the bovine ringworm pathogenesis and their possible transmission forms to humans, animals and the environment. Where do they come from? How did they turn to parasites? Med Mycol 18, Cutsem JV, F Rochette. Mycoses in domestic animals. Janssen Research Foundation, Beerse, Belgium. Atlas of Clinical Fungi. Prevalence dermatofiyosis yeast and mycelial fungi in bovine parasitic otitis in the state of Minas Gerais, Brazil.
J Vet Med 48, Factors associated with the prevalence of Malassezia species in the external ears of cattle from the State of Minas Bofinos, Brazil. Med Mycol 41, Increased expression of keratinase and other peptidases by Candida parapsilosis mutants. Braz J Med Biol Res 44, Yeasts in the gastrointestinal tract of preweaned calves and possible involvement of Candida glabrata in neonatal calf diarrhea.
Influence of diet on the shedding of Candida glabrata by experimentally infected preweaned calves.
Vet J Gudding R, A Lund. Immunoprophylaxis of bovine dermatophytosis.