[Immunologic diagnosis of animal hydatidosis--Preliminary results]. / Diagnóstico imunológico da hidatidose animal--Resultados preliminares.

Immunological reactions for diagnosis of Hydatidosis in cattle and swine are studied, such as Casoni, Latex agglutination and Serum-precipitation. The preliminary data shows that procedures may be useful in clinical practice of bovines. The same techniques in swine shows much promise, but requires further evaluation. The intradermal test for Hydatic disease, introduced by Casoni (1911) has been employed in some parts of the world and seems to be of high sensitivity in bovine. Latex agglutination and precipitation Test may be used in cases of weak skin reactions.

[Experimental trial to reproduction enzootic haematuria in cattle by feeding bracken fern [Pteris aquilina (Kuhn)] (author's transl)]. / Tentativa de reprodução experimental da hematúria enzoótica em bovinos pela administração de samambala.

Cattle were fed with a diet containing bracken fern in order to study the development of chronic bovine haematuria. The experimental 25 animals were randomly divided into 5 groups and such groups received different amounts of the plant. All groups were fed for 36 months, while no clinical effect of the disease was noted. After that time, the supplement of bracken fern to the diet was suspended and the animals still remained under observation. One of the animals (from group I) exhibit haematuria one month after the fern was removed from the diet. In the same occasion, four animals were slaughtered and only one of them presented haemorragic lesions in the urinary bladder. After 34 days another four animals were slaughtered and 114 days later three more were killed. All animals were chosen randomly and in spite of no clinical signs of the disease, all of them presented haemorragic lesions in the urinary bladder. The results obtained in this experiment confirmed that bracken fern (Pteris aquilina) is responsable for the development of chronic bovine haematuria in cattle. The disease is challenged by continuous ingestion of small amounts of bracken fern during a long period of time.