[Effectiveness of paraformaldehyde foam in continuous disinfection of poultry bedding and dried liquid waste of pigs].
In laboratory experiments 24-hour cultures of poultry strains E. coli, Staphylococcus, Pseudomonas on paper carriers without an agar coat and with it, after 6-hour exposure in dilutions from 10(-4) to 0, were devitalized by paraformaldehyde foam. The Bacillus strain was devitalized only after 24-hour exposure. After adding paraformaldehyde foam in an amount of 0.6% of the weight into litter under a multiplier flock of layers four months before expedition, and after adding paraformaldehyde foam in an amount of 5% and 10% of the weight into the litter for chick broilers, microbial contamination of the litter did not decrease in comparison with the control. 24-hour old cultures of tested microbial strains on carriers were not devitalized after 24-hour exposure in a mixture to litter and paraformaldehyde foam not even after adjusting the volume ratio of mixing to 1 : 9. The disinfecting effect on microbes growing in End's agar and in blood agar with crystal violet was manifested only after adding dried liquid manure of pigs with paraformaldehyde foam at a volume ratio of 50% to 50% after exposure times of 1, 3 and 6.0 weeks. Despite the excellent results obtained with paraformaldehyde foam in disinfecting test-microbes on carriers in laboratory experiments, practical application at a very low volume weight for continuous disinfection of poultry litter is technically unrealistic.
D000818:Animals; D004202:Disinfectants; D004203:Disinfection; D005557:Formaldehyde / Q000031:analogs & derivatives* / Q000494:pharmacology; D006799:Housing, Animal; D011200:Poultry; D013242:Sterilization; D013552:Swine; D014866:Waste Products
D004202:Disinfectants; D014866:Waste Products; D005557:Formaldehyde
Ucinnost paraformaldehydové pĕny pri kontinuální dezinfekci drůbezí podestýlky a suseného tekutého hnoje prasat.