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Clastogenic effect of bracken fern on human lymphocytes
Bracken fern has a lot of side effects, especially bleeding disorders, which are mainly seen in large animals. This study evaluates the effect of dietary bracken farm on chromosomes of cattle and humans.

Ingestion of bracken fern (Pteridium aquilinum v. arachnoideum) is associated with digestive tract cancer in different regions of Japan, Venezuela and Brazil.

In view of reports that dietary bracken fern causes chromosomal instability in cattle, the clastogenic effect of bracken fern was investigated, in a preliminary study, in peripheral lymphocytes obtained from habitual consumers and a control group of nonconsumers, which were carefully investigated about cancer history or family cancer history, negative in both cases, using protocols comparable to those previously described in studies in cattle raised on bracken pastures.

Cytogenetic analysis showed significant increased levels of chromosomal abnormalities, such as chromatid breaks, in cultured peripheral lymphocytes of the consumer group.
There was no correlation with subjects, gender, smoking habits or alcohol consumption, and the only correlation was with prolonged exposure to dietary bracken.

Source: Recouso, R. C., Santos, R. C. Stocco dos, Freitas, R., Santos, R. C., Freitas, A. C. de, Brunner, O., Beçak, W. & Lindsey, C. J. (2003): Clastogenic effect of bracken fern (Pteridium aquilinum v. arachnoideum) diet in peripheral lymphocytes of human consumers: preliminary data. In: Veterinary and Comparative Oncology 1 (1), 22-29.




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SMALL ANIMAL PRACTICE

Electroretinography as a prognostic indicator after retinal reattachment surgery
Retinal detachment is one of the ophthalmological emergencies, and even if the diagnosis is made early and a reattachment surgery is performed immediately many dogs do not regain postoperative vision. This 18‐month prospective study recorded signalment, duration, cause, and extent of retinal detachment and pre‐operative vision status. Rod and mixed rod‐cone ERG responses were recorded prior to RRS. Referring veterinary ophthalmologists assessed vision 2 months postoperatively to determine whether pre‐operative electroretinography (ERG) predicts postoperative vision in dogs undergoing retinal reattachment surgery (RRS).

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