Crystals in the intestinal epithelium of neonatal pigs

Laminated crystalline structures occurred within vacuoles of absorptive intestinal cells in colostrum-fed pigs. They are believed to be bilirubin crystals formed by breakdown of ingested red blood cells, but this could not be substantiated histochemically, and they could not be produced experimentally.

Attachment and penetration of Escherichia coli into intestinal epithelium of the ileum in newborn pigs

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Nonrandom mutagenesis of the Escherichia coli genome by nitrosoguanidine

The distribution on the genetic map of mutations induced with nitrosoguanidine in stationary-phase cultures of Escherichia coli is nonrandom.

A quantitative study of the transfer of colostral immunoglobulins to the newborn calf

The transfer of colostral IgM and IgG to newborn calves was studied quantitatively. Both IgM and IgG were absorbed equally well from the gastrointestinal tract of the calf. However, the degree of globulin absorption and hence the serum immunoglobulin concentrations varied considerably from calf to calf. Three of the ten calves remained virtually agammaglobulinaemic despite the ingestion of colostrum. The significance of failure to absorb colostral immunoglobulins (especially IgM) is discussed in relation to the pathogenesis of neonatal septicaemias of the newborn calf.

The Immunoglobulin Response in Intact and Splenectomized Calves Infected with Anaplasma Marginale

Two groups of 4-month-old calves (group I intact, group II splenectomized) were infected with Anaplasma marginale. The kinetics of the immunoglobulin response throughout anaplasmosis were assayed by means of the radial diffusion test. In group I, IgM levels increased about 7 days before the onset of patent infection and reached a peak of 200% above the preinfection value for the group. This macroglobulinemia persisted for a long period. Concentrations of IgG increased 11 days after the initial increase in IgM, but the IgG response was neither pronounced nor prolonged. All the calves in group II died. In these, both the IgM and complement-fixing antibody responses were significantly delayed, although some of them synthesized appreciable amounts of IgM before death. It was postulated that enhanced severity of anaplasmosis in splenectomized animals resulted from, 1) decreased sensitivity to low levels of parasite antigens, leading to delayed antibody synthesis and 2) impaired phagocytosis of anaplasma, due to the absence of splenic reticuloendothelial system.

Serum lactic dehydrogenase isoenzymes in "myxoedema heart disease"

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Management of the subclavian steal syndrome

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Corticotrophin and corticosteroids in the management of acute and chronic heart block

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Pigmented hairy epidermal nevus (Becker)

The pigmented hairy epidermal nevus (Becker) is a variety of epidermal nevus in which epidermal thickening may be minimal and hairiness and pigmentation obvious. Characteristically it is a unilateral lesion of the shoulder in males but it may affect other sites, be multiple and bilateral, and be found in women and Negroes. Histological examination may show no epidermal thickening. Nevus cells are not seen in the dermis.