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At least 991 records · Page 55Linked to original sources
PubMed2000

[Invasion of Dermanyssus gallinae (De Geer, 1778) in poultry farms in the Toruń region].

The studies were conducted in three big fully automaticised egg-laying farms within the boundaries of Toruń Voivodship, where Dermanyssus gallinae (DE GEER 1778) was present. The increased invasion of the parasite on one of the farms resulted in the presence of all clinical symptoms of dermanyssosis. A considerable decrease in the body weight, anaemia and organism exhaustion were observed. A growth in the hens' death rate from 1% (when they were not contaminated) to 4% was observed. There was also a decrease in egg-laying, particularly in its top phase. When breeding farms are not contaminated, egg-laying amounts normally to 91-93%, whereas in the contaminated farm the percentage lowered to 80-82%. The hens' death rate, a decrease in the egg production as well as a fall in the productive cycle by two months resulted in economical losses suffered by the farm owner. Having excluded the treatment costs, the sum amounted to c. 36,000 PLN in a single production cycle. To fight the parasite effectively, cleansing frequency, desinfecting with Wirkon and Pollena Jod K or caustic soda, and disinsectization with Neguvon and Alfasep 10WP were increased.

Animal Husbandry↗
PubMed2004

[Resistance in the hematophagous arthropods--problem on the rise. II: The consequences of resistance and management strategies to avoid resistance development].

Insecticide resistance has been a problem in all insects groups. Resistance has developed to every chemical class of insecticide, including microbial drugs and insect growth regulators. The result of rising resistance could be either increase in the number of arthropods cumbersome, like lice, or spread of arthropod-borne diseases, like malaria. The main tool of prevention against resistance is surveillance of the susceptibility of populations. Careful scrutiny of current information about vector resistance shows that the full effect of resistance on control efforts is not known. Resistance management strategies are dependent on early detection of the occurrence of resistance and efficient monitoring of resistance gene frequencies in populations. Detection of the susceptibility of a population could be shown trough bioassay, biochemical assay, or molecular assay. Resistance management can help avoid resistance development in populations or slow the rate of resistance development.

Animals↗
PubMed1991

[Epidemiology of bovine babesiosis in south-western Angola].

An epidemiological survey on bovine babesiosis was carried out in South-Western Angola. Both parasitological and serological methods were used. Use of the packed cell volume (PCV) technique increased up to five times the detection of infected cattle as compared with the thin blood smear method. Although the PCV method provided better information on the parasitological diagnosis, the indirect fluorescent antibody test represents a better approach for the evaluation of endemic situations. Results obtained by this method proved that in most herds and farms investigated there was an endemic stability. The disease did not present any problem in the traditional sector. Cases of babesiosis were only reported in some commercial farms where the control of ticks was inadequate and responsible for endemic instability.

Angola↗
PubMed1990

Eradication of ear mites from naturally infested conventional research rabbits using ivermectin.

Rabbits naturally infested with ear mites were treated with ivermectin injection for cattle, subcutaneously at the rate of 400 mcg/kg; which was repeated in 15 to 17 days. Rabbits treated as described and housed in a conventional vivarium environment were found to be free of mites during a subsequent 33 to 139 day observation period. Side effects were minimal and associated with occasional transient discomfort at the injection site. Ivermectin appears to be safe and effective for treating rabbits with ear mites. The prospects of eradicating mites from infested rabbit colonies using this method of treatment is promising.

Animals↗
PubMedDate not supplied

[Immunological structure of the population following the extermination of ticks in a natural focus of tick-borne encephalitis].

Ten years after the break of the chain of transmission of tick-borne encephalitis virus the level of the immune stratum of the local population declined from 59% to 39%. A decrease in the number of seroconversions was found in all the age groups but was particularly noticeable in the rural residents aged 10-30 years (39% and 13%), the mean titres declining from 1.8 log2 to 0.6 log2. In the rural residents over 30 years of age the immune stratum declined from 71% to 54%, the mean antibody titres from 3.4 to 2.5 log2. In subjects repeatedly infected in the natural focus, antihemagglutinins persisted for 10 years (the observation period).

Adolescent↗
PubMed1979

Immunization against anaplasmosis and babesiosis. Part III. Evaluation of immunization under field conditions in the Cauca River Valley.

Bovine anaplasmosis and babesiosis constitute serious constraints to efficient cattle production in Colombia. Nine commercial ranches located in the Cauca River Valley were used to evaluate the applicability, safety and economics of the newly developed immunization technology to control these diseases under actual field conditions using the minimum infective doses techniques. A total of 432 calves, 6--8 months old, of different breeds were used in this experiment. Calves born and raised in nonendemic areas of Valle, vaccinated against anaplasmosis and babesiosis and then moved to the endemic zone had developed a high degree of resistance. None of them died or required treatment after field challenge. In comparison, non-vaccinated controls suffered severe clinical anaplasmosis and babesiosis. Eighteen percent dies and 85% required chemotherapy to survive. Calves born and raised in the endemic zones of Valle and vaccinated did not suffer clinical disease nor require treatment after field challenge. However, non-vaccinated controls had 2% mortality and 60% of them required treatment to survive under the same field conditions. The weight gains favored vaccinated animals. The results of this study indicate significant reductions in deaths and production losses of cattle and the economic benefits to the livestock producers in controlling tick-borne diseases by vaccination.

Anaplasmosis↗