Hexachlorobenzene

Accumulation and depletion of some organochlorine pesticides in high-producing laying hens

“…However, the explanation given there is probably not applicable to our experiment. Compared to the half-value times of HCB in eggs of 11 weeks (Avrahami and Steele, 1972) and 9-11 weeks (Kan and Tuinstra, 1976b), the present value of 5-8 weeks is rather short. For a-and /3-HCH, no literature data are available, but the curves are in line with those expected from their accumulation pattern.…”

“…From these limited data, we calculated rising half-value times of 1.5 week for a-and 7-HCH and 2-3.5 weeks for HCB, /3-HCH, /3-heptachlor epoxide, total DDT, and dieldrin. From figures of Avrahami and Steele (1972), a rising half-value time of HCB in eggs of 4-5 weeks can be deduced. The data of Cummings et al (1966) and Waldron and Naber (1974) give a value of approximately 1.5-2 weeks for 7-HCH.…”

Accumulation of organochlorine pesticides in poultry: a review

“…Table I shows the accumulation ratios found for HCB in eggs. The data from Avrahami and Steele (1972a) were much higher than other reported data. In this experiment there were, however, three complicating factors.…”

“…Laying Hens. Table II shows that once again the values of Avrahami and Steele (1972a) are rather high. The remarks for values in eggs apply here too.…”

Toxicity, accumulation, and depletion of hexachlorobenzene in laying chickens

“…Onset of full egg production was delayed in groups receiving 10, 14, or 100 mg/kg of HCB (Table III). A similar delay was observed by Avrahami and Steele (1972b), but they hesitated to attribute it to dietary HCB because of low experimental numbers. Our independent observation of the same phenomenon indicates that HCB does, indeed, delay egg production, but final egg production is not affected.…”