. Poultry diseases and their treatment. Poultry. POULTRY DISEASES AND THEIR TREATMENT. l6l internal secretion which in some way controls the secondary sex- ual characters remains unchanged. As congenital atrophy of the ovary are to be classed cases of pseudo-hermaphroditism in fowls. In such cases a true, func- tioning ovary never develops. There may be a body which in gross features resembles an ovary, but it is inactive and does not take even the first steps in oogenesis (egg formation). There may or may not be a testis like body present in these cases. Not only is the egg producing activity
. Poultry diseases and their treatment. Poultry. POULTRY DISEASES AND THEIR TREATMENT. l6l internal secretion which in some way controls the secondary sex- ual characters remains unchanged. As congenital atrophy of the ovary are to be classed cases of pseudo-hermaphroditism in fowls. In such cases a true, func- tioning ovary never develops. There may be a body which in gross features resembles an ovary, but it is inactive and does not take even the first steps in oogenesis (egg formation). There may or may not be a testis like body present in these cases. Not only is the egg producing activity absent in such cases, but also in many of them at least, the internal secretion normally produced by the ovary is lacking also. The bird then takes on some or all of the secondary sexual characters of the male. The appearance of such a bird is shown in fig. Fig. 41. Showing a case of incomplete hermaphroditism. In front of the line a-b the bird has the characters of the male, behind it the characters of the female. The ovary was not functional in this bird. (Original). As ''black atrophy" of the ovary is here designated the peculiar disease of the ovary first observed more than a cen- tury ago in England as occurring in pheasants. The striking feature of the disease is that under its influence the bird assumes the plumage appropriate to the male. The change in the ovary and oviduct induced by the disease appears to be an atrophy ac- companied by a blackening which is probably a true melanosis. The following account of an outbreak of this disease about 50. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Pearl, Raymond; Surface, Frank Macy, 1882-; Curtis, Maynie Rose, 1880-; Maine Agricultural Experiment Station. Orono, Me.
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Keywords: ., bookauthorpe, bookcentury1900, bookdecade1910, booksubjectpoultry
