Incidence of dermatophytosis in canine cases presented at Apollo Veterinary College, Rajashtan, India (original) (raw)
Related papers
Occurrence of dermatophytosis in dogs from Thrissur, Kerala
Journal of Veterinary and Animal Sciences
Dermatophytosis is one of the most common skin diseases that affect dogs. Geographic factors like temperature and humidity play an important role in determining prevalence of dermatophytosis. The aim of this study was to determine the macroscopic and microscopic identification of different types of dermatophytes from the dogs presented to University Veterinary Hospital, Kokkali and Teaching Veterinary Clinical Complex, Mannuthy. Skin scrapings and hair were collected from the dogs presented with complaint of alopecia and pruritus. Each sample was cultured on Sabouraud Dextrose Agar (SDA). The cultures were incubated at room temperature for maximum of four weeks. The isolates of fungi were examined macroscopically and microscopically.Lactophenol cotton blue staining technique was used for fungi morphology identification. The most common type of dermatophytes affecting dogs in Thrissur district, Kerala were Trichophyton spp.(68 per cent), Microsporum spp. (32 per cent) and other non-d...
Detection and characterization of zoonotic dermatophytes from dogs and cats in and around Kolkata
Veterinary World, 2015
The ringworms of pet dogs, cats, and stray animals (dogs, cats, and other animals) could be a potential source of zoonotic infections causing a serious public health problem in the busy city Kolkata. The pet owners are more susceptible to get this infection from their pets, because of the close contact with them as dermatophytosis is very much prevalent in those pets. So, this study was aimed to check the prevalence of dermatophytosis in dogs, cats, and in pet owners. Materials and Methods: A total of 362 clinically suspected cases of dermatophytosis from dogs (123 in number), cats (202 in number), and human beings (37 in number) were collected and studied from in and around Kolkata to detect the presence of significant dermatophytes. Direct microscopy and cultural examination of the isolates were performed following standard methodology. Identification and characterization of the isolates were done by different biochemical tests. Results: Samples (n=285) having significant dermatophytic fungal infections were found to be of highest number in cats (158, 55.5%) than in dogs (108, 37.8%) and humans (19, 6.7%), respectively. The incidence of Microsporum canis (60.0%) was the highest from affecting dogs, cats, and human beings in comparison to Microsporum gypseum (22.5%), Trichophyton mentagrophytes (15.8%) and Trichophyton rubrum (1.7%). Detection of T. rubrum was only from human cases in this study, whereas the presence of rest three were slightly higher in cats than that of the dogs and humans in this present study. The incidences were higher in young animals and in humans of the age group of 21-30 years, during the rainy season (from April to August) and also in in-contact human beings. Conclusion: M. canis was the most commonly pathogen among all causing dermatophytosis in animals and also in the pet owners. M. gypseum and T. mentagrophytes were other pathogens associated with these infections. These infections were more prevalent in the rainy seasons and in in-contact human patients or pet owners.
Ringworm in cattle and man caused by Microsporum canis: Transmission from dog
Dermatophytosis ,caused by many dermatophytic fungi,is an important cutaneous mycotic zoonosis of global significance. Microsporum canis, a zoophilic dermatophyte, was identified as the prime cause of ringworm in two cross-bred, female calves which belonged to a private dairy farm in Gujarat, India. The small, discrete, scaly lesions were observed on the skin of the head and neck of the affected young cattle.The direct examination of the skin scrapings under light microscope showed hyaline,branched ,septate hyphae and arthrospores by potassium hydroxide technique. The fungus was isolated in pure culture from the skin scrapings on Sabouraud dextrose agar and dermatophyte test medium (DTM) .The detailed morphological examination of fungal growth in Narayan stain confirmed the identity as Microsporum canis. The retrospective epidemiology indicated that both the calves contracted the infection from a young male pet dog. In addition, one three-year-old female child in the family also acquired ringworm infection from the diseased dog. The skin scrapings from the calves, dog and child when examined under Wood's lamp exhibited a bright greenish yellow fluorescence suggesting Microsporum infection. Microsporum canis was also identified in the skin lesions of pet dog and the child by direct microscopy as well cultural isolation on mycological media. Interestingly, the isolates of Microsporum canis from cattle, dog and man did not reveal any difference in their cultural and morphological characteristics. The findings of this investigation indicated that transmission of Microsporum canis from the dog to cattle and man is possible. As animal dermatophytes are communicable to humans, care must be exercised while handling the sick animal or collecting the skin scrapings or applying drug on the skin lesions. It is emphasized that Narayan stain should be widely used in all public health and microbiology laboratories for studying the detailed morphology of fungi which are incriminated in the various clinical disorders of humans as well as animals.
Seminars in Avian and Exotic Pet Medicine, 2000
Dermatophytes are fungi that can use keratin as a nutrient source. These organisms invade keratinized tissue (skin, hair, and nails) and cause dermatophytosis or ringworm. Colonization is usually restricted to the nonliving, cornified layer of the epidermis because of the inability of dermatophytes to penetrate viable tissue of an immunocompetent host. However, infection does elicit a host response ranging from mild to severe that is related to the species and strain of fungus. Zoophilic species are primarily parasitic on animals, and infections are often mild or symptomless in exotic pets. Infection with unusual or geophilic (soil-associated) dermatophytes causes severe inflammatory lesions. Ringworm has long been associated with rodents and rabbits: it is common in rabbits and guinea pigs; uncommon in chinchillas, mice, and rats; rare in golden and dwarf hamsters; and unreported in gerbils. Dermatophytosis is rare in ferrets and unreported in pet African pygmy hedgehogs. In naturally occurring infections, Trichophyton mentagrophytes is the fungal species most commonly isolated; Microsporum sp. are occasionally reported. Because dermatophytes cause a communicable disease, pets that are symptomless carriers represent a potential zoonotic source to their owners. Current methods of diagnosis and clinical management of dermatophytosis, including a survey of recent trends in therapy are presented.
Dermatophytosis -A Highly Infectious Mycosis of Pet Animals
Dermatophytosis is a highly infectious mycotic disease of great economic, and public health consequences. It is estimated that 20 % of world population is affected with dermatophytosis. The disease is cosmopolitan in distribution, and has been frequently reported in humans as well as in many species of animals including cats and dogs. Dermatophytosis is an occupational mycozoonosis of pet owners, dog handlers, kennel attendants, dog trainers, dog catchers, veterinarians, and persons working in animal shelters. Among several species of dermatophytes, Microsporum canis is the principal cause of ringworm in cats, and dogs; and is recognized as an emerging pathogen of global significance. Transmission of infection can occur by direct contact with diseased animal and man, indirect contact with contaminated fomites or contact with soil. The disease is more severe and common in kittens and puppies. Direct microscopical demonstration of dermatophytes in skin /nail lesions by potassium hydroxide technique, and its isolation in pure growth on Sabouraud medium/DTM still considered the mainstay of diagnosis. A number of topical agents (miconazole, clotrimazole, terbinafine, luliconazole), and systemic drugs such (griseofulvin, ketoconazole, fluconazole, itraconazole) have been tried for the management of disease. The identification of asymptomatic carrier in kennels and catteries by culture of brushing, and use of Wood's lamp in screening of pet colonies where M. canis is the only concern, is recommended. The role of T. bullosum, a newly emerged zoophilic dermatophyte in the etiology of canine and feline ringworm should be investigated. It is emphasized that Narayan stain, which is cheap, easy to prepare and stable at room temperature, should be widely employed in microbiology and public health laboratories for the morphological studies of dermatophyes, which are implicated in the etiology of human and animal ringworm.
Isolation of dermatophytes from dogs and cats with suspected dermatophytosis in Western Turkey
Preventive Veterinary Medicine, 2011
The aim of this study was to determine the species of dermatophytes isolated from dogs and cats and their prevalence in the two big provinces of Western Turkey. A total of 362 animals (198 dogs and 164 cats) with skin lesions (alopecia and desquamation) were examined from March 2006 to February 2008. Of the 362 samples examined, 52 (14.4%) were positive for fungal elements by direct microscopic examination, and 70 (19.3%) were culture positive for dermatophytes. The isolation rates of dermatophyte species from dogs and cats were 18.7% and 20.1%, respectively. Microsporum canis (57.1%) was the most common species isolated from dogs and cats. The prevalence of Trichophyton mentagrophytes was five-fold greater in dogs than in cats (odds ratio = 5.226; CI = 1.152-23.696). No association was detected between prevalence of infection and provinces, and also sex of dogs and cats. The only risk factor found to be significantly associated with infection was age. Dogs and cats younger than one year of age showed a statistically significant higher prevalence of dermatophytes than other age groups (P < 0.05). The isolation rate of dermatophytes was relatively high in the spring and winter for dogs, and in the spring, summer and autumn for cats. However, the association of season and prevalence was found not to be significant.
Alexandria Journal of Veterinary Sciences, 2016
Dermatophytes are considered one of the important zoonotic superficial fungal skin diseases in different animal species in the world especially among immunocompromised, stressed and senile individuals. The disease affects the animal productivity, leather industry (cattle), animal performance (Horses) and zoonotic importance (cats).our study focused on three main species cattle, horses and cats with skin lesions suspected to be ring worm to determine the different causes. Diagnosis was carried out using direct examination of skin scraping, isolation of the fungus using FungAssay and microscopic determination of fungal spores and microconidia. Different species of dermatophytes were isolated from calves including, Microsporumcanis and Microsporum gypsum, while in horses Trichophytonmentagrophytes and Microsporum gypsum were isolated and in cats Trichophytonmentagrophytes and Microsporumcanis were isolated. Mixed infection was reported in some cases. We could conclude that the isolated fungi are Microsporumcanis,Trichophytonmentagrophytes and Microsporum gypsum.
2018
A study was undertaken to ascertain the prevalence of dermatosis in canines in and around tarai region of Uttarakhand. Diagnosis of different conditions was determined by microscopic examination of skin scrapings. Prevalence was based on region, etiology, age, breed, sex, and month wise. Highest prevalence of dermatosis was recorded at Pantnagar (21.16%) and lowest at Bajpur (16.15%). Fungal infections (32.93%) were the major etiological agents followed by miscellaneous infestations (24.55%), ticks/fleas/lice (20.95%), mange (10.77%) and mixed infections (10.77%). Maximum cases of dermatosis was reported in the month of August (27.0%) and minimum in April (10.3%). With respect to sex, males recorded a higher prevalence rate (59.28%) than females (40.71%) at Pantnagar. Infestation of tick/flea/lice was observed mainly in 2-5 years of age, mange during 0-6 month’s age group where as fungal infections mainly observed in dogs above 5 years of age. Regarding breed wise distribution maxim...
A retrospective study of Trichophyton mentagrophytes infection in dogs (1970-2002)
Veterinarski Arhiv, 2004
Clinical and laboratory examinations of all skin and hair samples yielded 66 (1.7%) isolates of Trichophyton mentagrophytes, while Microsporum canis was diagnosed in 840 cases (21.8%). Other dermatophytes were cultured less frequently. Microsporum gypseum was isolated in 38 dogs (1.0%), while Microsporum persicolor was diagnosed only twice (0.1%). A retrospective study of trichophytosis due to T. mentagrophytes was performed in order to present different clinical aspects in dogs. All 66 dogs showed clinical evidence of skin lesions, and four groups with different symptoms were identified. The majority of dogs 42 (63.6%) with T. mentagrophytes infection had lesions typical of dermatophyte infection. The remaining 24 dogs (36.4%) were without nummular lesions typical of dermatophyte appearance. The clinical picture included multifocal to diffuse appearance in 12 dogs (18.2%), severe inflammatory lesions in 10 (15.2%) or granulomatous lesions resembling pseudomycetoma in 2 dogs (3.0%). Considering the veterinary and public health importance of canine ringworm, attention was focused on T. mentagrophytes due to variations in clinical appearance which might make early diagnosis very difficult, together with duration of infection and reappearance due to persisting spores.