Effect of acaricide control ofAmblyomma variegatum ticks on bovine dermatophilosis on Nevis

Abstract

A sentinel group of 8 Bos taurus cattle was compared with similar cattle in a herd of 90 of which 21 were pastured with the sentinels. The sentinel group was not treated with acaricide whilst the rest of the cattle were treated weekly with the organophosphate acaricide ethion. Weekly counts of adult ticks and rankings of dermatophilosis were made on the sentinel herd. The remaining cattle were observed for the presence of ticks and dermatophilosis prior to the weekly treatment with acaricide. All sentinel cattle became infested with Amblyomma variegatum ticks and dermatophilosis developed on all. Rank correlations of tick numbers and dermatophilosis scores were between +0.34 and +0.98, varying with maturity of cattle and time during the trial. Incidence of dermatophilosis on the cattle treated with acaricide was very low. Tick numbers on the sentinel animals were compared to rainfall and temperature. It is concluded that acaricide is the best option for controlling bovine dermatophilosis in Nevis.

Prevalence and pathology of dermatophilosis in camels (Camelus dromedaries) in Iran

“…This organism is found throughout the world, but is most prevalent in tropical and subtropical regions, and has a wide host range (Zaria 1993;Burd et al 2007). Endemic and epidemic infections are most commonly reported in cattle, sheep, goats, and horses (Poermagjaja et al 1993;Hadrill and Walker 1994;Patten et al 1995;Yeruham et al 1996Yeruham et al , 2000Msami et al 2001;Chatikobo et al 2004;Szczepanik et al 2006;Dalis et al 2010). The disease has been reported in dogs, cats, pigs, and humans (Kaya et al 2000).…”

In Vitro Efficacy of Extracts From Plants Used by Small-Holder Farmers in the Treatment of Dermatophilosis in Cattle

“…Topical applications of potassium aluminium hydroxide used with parenteral applications of long acting tetracyclines provided treatment (Nath et al, 2010). Due to the association of bovine dermatophilosis with Amblyomma variegatum ticks (Walker, 1996), tick control has been an important adjunct in the control of the disease (Hadrill and Walker, 1996). Non-conventional or ethno-veterinary preparations have been used to manage bovine dermatophilosis.…”

Spatiotemporal patterns of clinical bovine dermatophilosis in Zimbabwe 1995–2014

“…Diagnoses were based on the presenting clinical signs and the provisional diagnosis was verified based on adherence to a prescribed case definition for bovine dermatophilosis, geographical area, and season. Cases presenting with a case definition that satisfied any one of the following clinical signs (lesions): small paint brush-like clumping of hair, multiple circumscribed scabs over 1 cm in diameter and confluent progressive lesions as described by Hadrill and Walker ( 1996 ), were considered clinically to be bovine dermatophilosis cases. The officers making the diagnoses were trained in animal health and disease recognition and possessed qualifications ranging from diploma in animal health to veterinary science degrees.…”

“…Dermatophilosis is an economically important disease of livestock caused by Dermatophilus congolensis , a Gram-positive actinomycete that produces motile zoospores which invade the skin (Hadrill & Walker 1996 ; Samson et al 2010 ). Although it has a worldwide distribution, the disease is reported mainly in African countries (Awad, Nadra-Elwgoud & El-Sayed 2008 ).…”