Eradication programmes directed against Sarcoptes scabiei var. suis, performed without any
disinfection of the environment, were compared to an eradication programme including a
simultaneous environmental disinfection. The performance of such programmes would be
facilitated considerably if environmental disinfection could be avoided. The trial was conducted
in four conventional piglet-producing herds designated A±D. All herds suffered from a subclinical
but persistent infection with the sarcoptic mite. Herd A was treated with two injections of
ivermectin and simultaneously disinfection of the environment was done. In the other herds, the
animals were treated twice (B and C) or three times (D) with acaricides (ivermectin or phoxim) at
intervals of 7±12 days without any simultaneous disinfection of the buildings or environment. The
results were monitored by attempts to demonstrate the mite by skin scrapings, and by monitoring
the levels of serum antibodies to Sarcoptes scabiei by an ELISA. Samples were taken from all
adults and from 20% of the piglets aged 10±12 weeks, before initiating the control programmes,
every third month during the first year and a final sampling 18 months after the treatments. After
treatment, the levels of antibodies continuously decreased. Presumably dead S scabiei were
demonstrated in one sow from two of the herds 3 months after initiating acaricidal treatments. S
scabiei was not demonstrated later, nor from skin scrapings of the piglets. The results obtained
demonstrate that it is possible to eradicate sarcoptic mange mites in swine herds with the use of
simplified eradication programmes. The success of such programmes may efficiently be monitored
Eradication programmes directed against Sarcoptes scabiei var. suis, performed without anydisinfection of the environment, were compared to an eradication programme including asimultaneous environmental disinfection. The performance of such programmes would befacilitated considerably if environmental disinfection could be avoided. The trial was conductedin four conventional piglet-producing herds designated A±D. All herds suffered from a subclinicalbut persistent infection with the sarcoptic mite. Herd A was treated with two injections ofivermectin and simultaneously disinfection of the environment was done. In the other herds, theanimals were treated twice (B and C) or three times (D) with acaricides (ivermectin or phoxim) atintervals of 7±12 days without any simultaneous disinfection of the buildings or environment. Theresults were monitored by attempts to demonstrate the mite by skin scrapings, and by monitoringthe levels of serum antibodies to Sarcoptes scabiei by an ELISA. Samples were taken from alladults and from 20% of the piglets aged 10±12 weeks, before initiating the control programmes,every third month during the first year and a final sampling 18 months after the treatments. Aftertreatment, the levels of antibodies continuously decreased. Presumably dead S scabiei weredemonstrated in one sow from two of the herds 3 months after initiating acaricidal treatments. Sscabiei ก็แสดงให้เห็นในภายหลัง หรือ จากผิว scrapings ของทรูด ผลลัพธ์ที่ได้แสดงให้เห็นว่า เป็นไปได้ที่จะขจัด sarcoptic mange ไรในฝูงสุกรด้วยการใช้โปรแกรมกำจัดได้ง่ายมากขึ้น ความสำเร็จของโปรแกรมดังกล่าวอาจถูกตรวจสอบได้อย่างมีประสิทธิภาพ
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