תפריט נגישות
ניגודיות עדינהניגודיות גבוהה
מונוכרום
הדגשת קישורים
חסימת אנימציה
פונט קריא
סגור
איפוס הגדרות נגישות
להורדת מודול נגישות חינם תפריט נגישותניגודיות עדינהניגודיות גבוההמונוכרוםהדגשת קישוריםחסימת אנימציהפונט קריאסגוראיפוס הגדרות נגישותלהורדת מודול נגישות חינםAvishai Lublin, Michael Samish, Aziza Mishoutchenko - Kimron Veterinary Institute, P.O.Box 12, Bet Dagan 50250, Israel
Lesser mealworm beetles (Alphitobius diaperinus) are frequently present in large numbers in poultry houses. They may be important as a reservoir and vector of various pathogens including Salmonella spp., which are responsible for many of the humane food-borne disease outbreaks. Previously it was shown by McAllister et al (1994) that under controlled laboratory conditions, Salmonella can survive in the digestive system of beetles for over 14 days. In controlled trials we were able to show that by force-feeding of Salmonella-free turkey poults or chicks with Salmonellainfected adult Alphitobius diaperinus beetles, the infection was distributed to the birds which subsequently showed clinical salmonellosis. The beetles were left for 7 days on mash feed contaminated with 106 CFU/g Salmonella infantis. On the 8th day, before feeding the birds with infected beetles, the beetles were externally disinfected with 70% ethyl alcohol followed by 2% sodium hypochlorite, which was proven to kill all Salmonella on the beetle’s integument. The intestinal tract of the beetles still contained the pathogen. Each bird from a group of 10-15 was force-fed with 10 infected beetles, while 5-10 other birds served as non-contaminated controls and were fed non-contaminated beetles. Cloacal shedding of Salmonella started 1 or 2 days post infection, as mortality of poults due to Salmonella (none of the chicks died). To conclusively determine whether infected beetles can transmit Salmonella between consecutive flocks in a poultry house despite the cleaning and disinfection process, more trials need to be done. These would include determining the ability of the pathogen to survive the molting stages and metamorphosis of the host beetle, and examining the means and duration of Salmonella adherence to the cuticle of the beetle. This preliminary study suggests that beetles in poultry houses may be a potential vector of Salmonella to birds.
Avishai Lublin, Michael Samish, Aziza Mishoutchenko - Kimron Veterinary Institute, P.O.Box 12, Bet Dagan 50250, Israel
Lesser mealworm beetles (Alphitobius diaperinus) are frequently present in large numbers in poultry houses. They may be important as a reservoir and vector of various pathogens including Salmonella spp., which are responsible for many of the humane food-borne disease outbreaks. Previously it was shown by McAllister et al (1994) that under controlled laboratory conditions, Salmonella can survive in the digestive system of beetles for over 14 days. In controlled trials we were able to show that by force-feeding of Salmonella-free turkey poults or chicks with Salmonellainfected adult Alphitobius diaperinus beetles, the infection was distributed to the birds which subsequently showed clinical salmonellosis. The beetles were left for 7 days on mash feed contaminated with 106 CFU/g Salmonella infantis. On the 8th day, before feeding the birds with infected beetles, the beetles were externally disinfected with 70% ethyl alcohol followed by 2% sodium hypochlorite, which was proven to kill all Salmonella on the beetle’s integument. The intestinal tract of the beetles still contained the pathogen. Each bird from a group of 10-15 was force-fed with 10 infected beetles, while 5-10 other birds served as non-contaminated controls and were fed non-contaminated beetles. Cloacal shedding of Salmonella started 1 or 2 days post infection, as mortality of poults due to Salmonella (none of the chicks died). To conclusively determine whether infected beetles can transmit Salmonella between consecutive flocks in a poultry house despite the cleaning and disinfection process, more trials need to be done. These would include determining the ability of the pathogen to survive the molting stages and metamorphosis of the host beetle, and examining the means and duration of Salmonella adherence to the cuticle of the beetle. This preliminary study suggests that beetles in poultry houses may be a potential vector of Salmonella to birds.
