First report of Dermatophilus congolensis infection in native Omani cattle.

Mahmoud El-Neweshy, Julanda Al Mawly, Haytham Alieldin Ali


Skin lesions were reported in a group of quarantined Omani native cattle for exportation purpose during January 2018. The skin lesions were reported in 17 animals out of 140 and were scattered over the head, neck, back and perineal region of the animals. Lesions varied from paint-brush matted hairs to wart-like lesions that are up to 2 cm in diameter. Skin scraping samples were obtained from the living animals and were directly stained with gram stain. Histologically, there was severe multifocal exudative dermatitis with hyperkeratosis. Dermis was infiltrated with neutrophils, mononuclear cells, and numerous branching filaments coccoid bodies. Bacterial culture on sheep blood agar revealed gray to white, beta hemolytic, raised and irregularly shaped colonies. Gram staining showed gram positive branching filaments with both transverse and longitudinal fragments formed from packs of coccoid cells confined with Dermatophilus congolensis. Animals were treated successfully with 3 doses of intra muscular injection of long-acting oxytetracycline with topical application of antibiotic spray. To the best of our knowledge, this is the first report of dermatophilosis in Omani cattle.


Dermatophilosis pathology; Oman; natural infection; Dermatophilus Congolensis

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Bancroft, J. D., 2013. Histochemical techniques, Butterworth-Leinemann.

Burd, E. M., Juzych, L. A., Rudrik, J. T. & Habib, F., 2007. Pustular dermatitis caused by Dermatophilus congolensis. Journal of Clinical Microbiology, 45, 1655-1658

Carter, G. R. & Cole, G. R., 1990. Diagnostic procedures in veterinary bacteriology and mycology. 5th edition (Academic Press, California), 280-283

Dean, D., Gordon, M., Severinghaus, C., Kroll, E. & Reilly, J., 1961. Streptothricosis: a new zoonotic disease. New York State Journal of Medicine, 61

Gebreyohannes, M. and Gebresselassie, M., 2013. An overview on dermatophilosis of animals. Journal of Animal Science Advances, 3, 337-344

Gitao, C., Agab, H. and Khalifalla, A., 1998. Camel dermatophilosis in Kenya, Sudan and Saudi Arabia. Proc. Third Ann. Meeting for Anim. Prod. Under Arid Conditions, 93-107

Jafari Shoorijeh, S., Badiee, K., Behzadi, M. & Tamadon, A., 2008. First report of Dermatophilus congolensis dermatitis in dairy cows in Shiraz, Southern Iran. Iranian Journal of Veterinary Research, 9, 281-283

Joseph, S., Wernery, U. and Ali, M., 1998. Dermatophilosis caused by a non haemolytic Dermatophilus congolensis strain in dromedary camels in the United Arab Emirates. Journal of Camel Practice and Research, 5, 247-248

Osman, S. A., 2014. Camel dermatophilosis: clinical signs and treatment outcomes. Journal of Camel Practice and Research, 21: 199-204

Pal, M., 1995. Prevalence in india of Dermatophilus congolensis infection in clinical specimens from animals and humans. Revue Scientifique et Technique-Office International des Epizooties, 14, 857-857.

Quinn, P. & Markey, B., 2003. Section II pathogenic bacteria, Dermatophilus congolensis. Concise Review of Veterinary Microbiology. 1st edition: Blackwell Publishing.

Quinn, P. J., Markey, B. K., Leonard, F. C., Hartigan, P., Fanning, S. & Fitzpatrick, E. I., 2011. Veterinary Microbiology and Microbial Disease, John Wiley & Sons.

Stewart, G., 1972. Dermatophilosis: a skin disease of animals and man. I. Veterinary Record, 91, 537-544

Tarazi, Y. H. and Al-ani, F. K., 2016. An outbreak of dermatophilosis and caseous lymphadenitis mixed infection in camels (Camelus dromedaries) in Jordan. The Journal of Infection in Developing Countries, 10, 506-511

Yeruham, I., Elad, D. and Perl, S., 2003. Dermatophilosis in goats in the Judean foothills. Revue de Médecine Vétérinaire, 154, 785-788

Zaria lt. 1993. Dermatophilus congolensis infection (dermatophilosis) in animals and man! An update. Comparative Immunology, Microbiology & Infectious Diseases, 16:179–222



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