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Poultry Science Jun 1980Coumaphos (O-(3-chloro-4-methyl-2-oxo-2H-1-benzopyran-7-yl)O,O-diethyl phosphorothioate), famphur (O-[p-(dimethylsulfamoyl)phenyl] O,O-dimethyl phosphorothioate)....
Systemic activity of coumaphos, famphur, crufomate, ronnel, and phosmet given orally to hens for control of the northern fowl mite, Ornitbonyssus sulviarum (Canestrini and Fanzago).
Coumaphos (O-(3-chloro-4-methyl-2-oxo-2H-1-benzopyran-7-yl)O,O-diethyl phosphorothioate), famphur (O-[p-(dimethylsulfamoyl)phenyl] O,O-dimethyl phosphorothioate). crufomate (4-tert-butyl-2-chlorophenyl methyl methylphosphoramidate), ronnel (O,O-dimethyl O-(2,4,5-trichlorophenyl) phosphorothioate) and phosmet (O,O-dimethyl phosphorodithioate S-ester with N-(mercaptomethyl) phthalimide) were administered as systemic acaricides (either single or multiple oral doses or as feed additives) for control of the nortnern fowl mite, Ornithonyssus sylviarum (Canestrini and Fanzago), on caged White Leghorn hens. None of the treatments controlled the mites, but some hens were poisoned.
Topics: Animals; Chickens; Coumaphos; Insecticides; Mite Infestations; Organophosphorus Compounds; Organothiophosphates; Organothiophosphorus Compounds; Phosmet; Poultry Diseases; Sulfonamides
PubMed: 6157151
DOI: 10.3382/ps.0591208 -
Canadian Journal of Comparative... Jan 1981When applied to yearling steers on November 30, pour-on applications of famphur at 40 or 50 mg/kg were unsatisfactory for systemic grub control as they only reduced the... (Comparative Study)
Comparative Study
When applied to yearling steers on November 30, pour-on applications of famphur at 40 or 50 mg/kg were unsatisfactory for systemic grub control as they only reduced the number of warble grubs by 52.2 and 68.4%, respectively. The treatments, which had no adverse effects on the health of steers or cellular constituents of their blood, reduced the whole-blood cholinesterase, with the maximum reduction occurring 15 days after treatment. Low ambient temperatures prevailing at the time of treatment and during the two following weeks might have impeded the absorption of famphur through the skin and reduced its effectiveness for grub control. With the grub damage kept to the minimum by weekly manual removal of warble grubs, the groups treated with famphur at 40 or 50 mg/kg outgained (P less than 0.05) the untreated group by 29.9 and 13.4 kg/steer, respectively, during the posttreatment period of 181 days. These results indicate the economic benefits of grub control.
Topics: Administration, Topical; Animals; Body Weight; Cattle; Cattle Diseases; Cholinesterases; Hypodermyiasis; Insecticides; Male; Organothiophosphates; Organothiophosphorus Compounds; Sulfonamides
PubMed: 7272837
DOI: No ID Found -
The Canadian Veterinary Journal = La... Jun 1981Holstein-Friesian calves (n = 12) were treated with famphur at three dosage levels 20.25 mg/kg, 40.5 mg/kg and 60.75 mg/kg. The only changes observed in the calves were... (Comparative Study)
Comparative Study
Holstein-Friesian calves (n = 12) were treated with famphur at three dosage levels 20.25 mg/kg, 40.5 mg/kg and 60.75 mg/kg. The only changes observed in the calves were pupillary constriction in two calves receiving the high dosage and marked depression of whole blood acetylcholinestrase activity. The length of time the blood acetylcholinesterase activity was reduced was longer than previously reported in Hereford cattle.
Topics: Administration, Topical; Animals; Cattle; Cholinesterases; Female; Insecticides; Male; Organothiophosphates; Organothiophosphorus Compounds; Sulfonamides
PubMed: 7284948
DOI: No ID Found -
The Cornell Veterinarian Jul 1985A case of presumptive organophosphate-induced delayed neurotoxicity in a bull is described. All signs were referable to a focal cervical or diffuse spinal cord lesion....
A case of presumptive organophosphate-induced delayed neurotoxicity in a bull is described. All signs were referable to a focal cervical or diffuse spinal cord lesion. These included recumbency with severe symmetrical paresis of all 4 limbs, the hind limb involvement being greater than the forelimbs. CSF analysis was normal. The bull was killed and necropsied. There were no gross CNS lesions. Histopathologic finds are characterized and their resemblance to lesions observed in delayed neurotoxicity caused by organophosphate compounds is discussed. The bull had been treated with organophosphate insecticide (famphur) 43 days prior to the onset of signs.
Topics: Animals; Brain Stem; Cattle; Cattle Diseases; Insecticides; Male; Nerve Degeneration; Organothiophosphates; Organothiophosphorus Compounds; Paralysis; Spinal Cord
PubMed: 4017591
DOI: No ID Found