The control program of red poultry mite (Dermanyssus gallinae), today

Dermanyssus gallinae control has so far been predominantly based on acaricides (insecticides) and their efficacy has been decreasing in time due to the development of resistance. D. gallinae is a species that has developed resistance to all current acaricides. Considering this, we can assume that the new acaricide - fluralaner with its evident efficacy, but also with some downsides, will improve the situation in D. gallinae control in the short term. The control of red poultry mite population in intensive poultry production has had an unfavourable tendency for decades. In order for this trend to be stopped and reversed, certain measures must be taken to the control of this disease. It is necessary to eliminate toxicological risks; define the short-term objective (efficient suppression) and the long-term one (eradication); introduce the principles of biosecurity, prevention, and rational control; provide a professional application of formulations and increase the quality of monitoring. The D. gallinae program control integrates all the above specified elements into a whole. In our opinion, the currently used program currently used on farms, based on mechanical control and active influence on technological processes, has a bright future. This type of control can be combined with other efficient methods of mite suppression on farms.

AN INNOVATIVE FORMULATION OF PARAFFIN AND SILICONE OILS FOR THE CONTROL OF THE RED POULTRY MITE (Dermanyssus gallinae) – EXAMINATION OF THE EFFICIENCY UNDER LABORATORY CONDITIONS

The past decades of clinical practice in poultry farming are character-ized by inadequate control of one of the most important poultry ectopara-site, the red poultry mite (Dermanyssus gallinae). Therefore, the program for control of D. gallinae based exclusively ona physical mechanisms of action of acaricides has been developed in Serbia since 2012. By the beginning of 2017, a synergistic relationship between paraffi n and silicone oils was observed by our team, and its effi ciency in preventing the red poultry mite from respiring was examined. For laboratory examination the Petri dish and tin-box methods were used. Direct, full 1-minute exposure of adult mites to the recommended (15 and 20%) or even much lower concentration of the formulation resulted in 100% mortality aft er 24 hours. Subsequent 1-hour exposure (24 hours aft er application onto treated non-absorbent surface of adult mite) resulted in 100% mortality with the same concentrations. The long term eff ect depends on the surface quality. The concentrations of 15 and 20% provide 100% long-term eff ect aft er a 1-hour exposure period, and remains fully eff ective over the following 4-month period. In the following months (8 months), the formulation continues to work with a slightly lesser, however, still signifi cant eff ect. The formulation is most eff ective on a plastic surface, where the full eff ect is achieved with signifi cantly lower concentrations. The formulation has no eff ect on eggs; however, aft er the short development cycle is completed in the egg (2-6 days) and exit from the shell, the larva is immediately exposed to the eff ects of the formulation and eliminated. High effi ciency of the paraffi n and silicone oils formulation, which has been established in laboratory conditions, justifi es its use to the purpose of D. gallinae control in cages and equipment before fl ock settle-ment as well as in transport cages aft er cleaning and disinfection.

Occupational otitis externa in chicken catchers

Otitis externa is only occasionally occupational in origin and infestations of the ear are even less common. Two cases of occupational otitis externa due to infestation with Dermanyssus gallinae, the red poultry mite, are reported occurring in poultry workers.