Tag Archives: Permethrin


Urticaria is a very common nodular presentation. Edema in the dermis causes a rapid onset of nodules. This condition is often referred to as “feed bumps” or “protein bumps” by the layperson. The pathogenetic mechanism is that of a type I hypersensitivity most often associated with drug administration such as antibiotics, antiinflammatory agents, or vaccines.… Read More »

Collagenolytic Granuloma

The second clinical presentation of nodules is that of a more slowly progressive, infiltrative lesion. Collagenolytic granuloma (nodular necrobiosis, equine eosinophilic granuloma with collagen degeneration) is the most common nodular skin disease of horses within this category. The etiology of these nodules is unknown; however, it is probably a type IV hypersensitivity reaction to insect… Read More »

Treatment of Pastern Dermatitis

The appropriate therapy obviously involves identification of the predisposing, perpetuating, and primary factors. In general, avoiding pastures/paddocks with mud, water, or sand may minimize predisposing factors. Keeping patients stalled during wet weather and until morning dew has dried is often rewarding. Use of alternate sources of bedding may be beneficial because the chemicals in treated… Read More »

Fly Control

Flies (Diptera) are ubiquitous pests of horses. The general life cycle of flies includes four stages: egg, larva, pupa, and adult. Flies that depend most on domestic animals for energy sources are the easiest to control. In some species of flies, the adults use domestic mammals as a primary energy source (e.g., horn flies). However,… Read More »

Tabanids, Black Flies, And Biting Midges

Tabanids, black flies, and biting midges are not livestock-dependent, and it is impossible to control the larval habitat. Tabanids In North America, tabanids are horse flies (Tabanus spp.) and deer flies (Chrysops spp.), which are 6- to 11-mm, yellow-orange flies with dark body markings and mostly with patterned wings. The term horse fly describes a… Read More »

Culicoides Hypersensitivity

The best-documented insect hypersensitivity is that caused by Cidicoides spp. These insects — also known as “no-see-ums,” “biting midges,” and “punkies” — inflict an extremely painful bite due to their chewing mouthparts. They create primary papules, or wheals. Secondary lesions are a result of intense pruritus that leads to alopecia, scaling, crusting, hy-perpigmentation, and lichenification.… Read More »

Activyl Tick Plus [Indoxacarb-Permethrin] for Dogs

Active substance / Generic: Indoxacarb-Permethrin Scientific discussion This medicine is approved for use in the European Union Activyl Tick Plus is an ectoparasiticide containing indoxacarb and permethrin as the active substances and is presented in cardboard boxes of 1, 4 or 6 pipettes. Activyl Tick Plus is indicated for flea and tick infestations in dogs and… Read More »


(Arachnida) Mites can be divided into two major groups: sarcoptiform and nonsarcoptiform mites. The sarcoptiform mites can be subdivided into those that burrow or tunnel within the epidermis and those that do not. Sarcoptiform mites are distinguished from nonsarcoptiform mites by possessing a round to oval-shaped body. The legs of sarcoptiform mites also have pedicels… Read More »