robert45 schreef:Vlooienresistentie.....
Kan er iemand hier een wetenschappelijk onderbouwd bewijs leveren dat de vlooienmiddelen zoals een frontline resistente vlooien opleveren?
Graag een bron!
http://www.sciencedirect.com/science/ar ... 7504000240
dit gaat over fipronil resistentie bij kattenvlooien, hier heb je dus je bron. Heb ik binnen een minuutje zoeken gevonden, dus er moeten nog wel meer bronnen zijn.
edit: minuutje later vond ik deze bron:
Citaat:Pest Manag Sci. 2004 Dec;60(12):1157-62.
Identification of the Rdl mutation in laboratory and field strains of the cat flea, Ctenocephalides felis (Siphonaptera: Pulicidae).
Bass C, Schroeder I, Turberg A, Field LM, Williamson MS.
Source
Biological Chemistry Division, Rothamsted Research, Harpenden, AL5 2JQ, United Kingdom.
Abstract
In many insect species, resistance to cyclodiene insecticides is caused by amino acid substitutions at a single residue (A302) within the M2 transmembrane region of the gamma-aminobutyric acid (GABA) receptor sub-unit termed Rdl (resistance to dieldrin). These mutations (A302S and A302G) have also been shown to confer varying levels of cross-resistance to fipronil, a phenylpyrazole insecticide with a similar mode of action to cyclodienes. To investigate the possible occurrence of these mutations in the cat flea, Ctenocephalides felis (Bouché), a 176-bp fragment of the cat flea Rdl gene, encompassing the mutation site, was PCR amplified and sequenced from nine laboratory flea strains. The A302S mutation was found in eight of the nine strains analysed, although the relative frequency of the mutant allele varied between strains. Only one strain (R6) was found to be homozygous for the S302 allele in all the individuals tested, and this correlated with previous reports of low-level fipronil resistance in this strain. A PCR-based diagnostic assay, capable of screening individual fleas for this mutation, was developed and used to survey a range of fleas collected at random from veterinary clinics in the UK and USA. The A302S mutation was present at a high frequency in these domestic pet populations.
Edit2: en nog geen 10 seconden later vond ik deze review, voor degenen die hem via PubMed etc. kunnen openen makkelijker te lezen dan bovenstaande artikelen.
Citaat:J Med Entomol. 1998 Jul;35(4):415-22.
Review of insecticide resistance in cat fleas (Siphonaptera: Pulicidae).
Bossard RL, Hinkle NC, Rust MK.
Source
Department of Entomology, Kansas State University, Manhattan 66506, USA.
Abstract
Insecticide resistance often is blamed for failures of insecticides to control cat fleas, Ctenocephalides felis (Bouché). Yet the genetics and adaptive advantage of resistance traits remain unexamined. Lethal doses of insecticides that kill 50% of the population fluctuate 7-fold within a cat flea strain. Many reports of flea resistance may be attributable to variable mortality from effects of solvents, substrates, humidities, temperatures, colonization, and ages of fleas. Resistance ratios (ratios of lethal doses of a resistant to a susceptible strain) are < 690-fold in fleas; lower than many other arthropods. This, plus strain variability, hinders resistance detection. Relationships between resistance levels, control failures, and health threats are unclear. Insensitive acetylcholinesterase, knockdown recovery, glutathione transferase conjugation, and mixed function oxidase/cytochrome P450 are demonstrated resistance mechanisms in cat fleas. Ecological genetics of resistance in cat fleas probably involves flea transfer among hosts, host movements, refugia, founder effects, and mortality from abiotic factors. Understanding cat flea resistance requires population monitoring before, during, and after insecticide treatments using conventional and rapid molecular bioassays. Sustained insecticide release devices such as flea collars and long-lived insecticide residues for premises possibly contribute to the development of resistance. New systemic and topical insecticides, especially when given prophylactically, may act similarly. Eliminating insecticides prevents insecticide resistance but necessitates application of biorational tactics incorporating mechanical, environmental, and cultural controls. Using high temperatures, low humidities, host grooming and such tactics as decreasing doses, increasing action thresholds, rotating insecticides, and leaving spatial and temporal refugia may suppress cat flea resistance.

