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Biomedical subjects

A E Larsen

Publications and source records attributed to A E Larsen.

At least 37 records · Page 2Linked to original sources
PubMed1977

Isolation of Aleutian disease virus of mink in cell culture.

Aleutian disease virus, the causative agent of a persistent infection in mink, was isolated in a continuous line of feline renal cells when the cultures were maintained at reduced temperature (31.8 degrees). After serial in vitro passage of the virus at this temperature it had an optimum replication temperature of 37 degrees. An immunofluorescence focus assay was found to be suitable for virus quantitation. The cultured virus reproduced Aleutian disease in mink, and the virus could be reisolated from the mink 10--180 days after inoculation. The properties of the virus suggest that it is a member of the parvovirus group.

Aleutian Mink Disease Virus↗
PubMed1977

Reduced severity of lesions in mink infected transplacentally with Aleutian disease virus.

Inoculation of mink late in the second trimester of pregnancy with Aleutian disease virus (ADV) produces a persistent infection in the offspring. When these mink were analyzed at 83 days of age and compared with adolescent mink infected for a similar length of time, the transplacentally infected mink show: 1) a marked reduction in plasmacytosis, immunoglobulin level and specific ADV antibody; 2) increased amounts of infectious ADV and numbers of cells containing viral antigen; 3) a marked reduction in immune complex glomerulonephritis and absence of immune complex arteritis; 4) free ADV antigen in the glomeruli; and 5) a striking accumulation of eosinophils in the tissues. The findings suggest that the degree of ADV expression is partially immunologically controlled.

Aging↗
PubMed1976

Experimental porcine nephropathy: changes of renal function and structure perorally induced by crystalline ochratoxin A.

Nine pigs were fed crystalline ochratoxin A in amounts corresponding to a feed level of 1 mg per kg for 3 months. The only observable lesion developed was a kidney damage, identical to the naturally occurring porcine nephropathy. The changes of renal function was characterized by impairment of proximal tubular function, indicated by a decrease of the ratio TmPAH/CIn, of the ability to concentrate urine, and by an increased urinary excretion of glucose. The decrease of the ratio TmPAH/CIn is correlated with time of exposure to ochratoxin A. The changes of renal structure were characterized by degeneration of the proximal tubules, leading to tubular atrophy accompanied by interstitial fibrosis. At the end of the experiment the kidney, liver, adipose and muscular tissue of the slaughtered pigs contained sizable amounts of ochratoxin A residues. As the pigs would have passed the meat inspection this represents a possible health problem. The changes observed in this study are identical to those observed by feeding to pigs grains naturally contaminated with ochratoxin A.

Adipose Tissue↗
PubMed1975

Pathogenesis of aleutian disease of mink: identification of nonpersistent infections.

Aleutian disease virus usually produces a persistent infection and progressive immune comples disease in mink of the Aleutian genotype. Study of Aleutian disease virus infection in non-Aleutian mink showed that about one-quarter developed nonpersistent infections by the virus, and that the nonpersistence was not genetically determined by the host. The nonpersistently infected mink developed only a transient elevation of serum gamma globulin, and much lower specific Aleutian disease virus antibody titers than persistently infected mink. No lesions were found in the nonpersistently infected mink.

Aleutian Mink Disease↗
PubMed1975

Isolation of infectious bovine rhinotracheitis virus from Mustelidae.

Herpesviruses isolated from either domesticated or wild carnivores should be immunologically compared with known viruses of this group which could have been included in the diet of the animal before being considered to be previously undescribed herpesviruses native to the carnivore in question.

Animals↗
PubMed1975

Positive irregular antibody screen due to leukocyte antibody.

A case is described of a multi-transfused, multiparous woman whose serum gave positive results in routine screening for irregular antibodies. No red cell antibodies could be identified, however, and apparently compatible units were crossmatched for this patient. Upon administration of a unit of whole blood, the patient exhibited severe chills and fever. Her serum was found to contain a strong anti-HLA 17, and possibly other white cell antibodies, as well. It is suggested that the positive irregular antibody screen detected the leukocyte antibody, because of expression of HLA antigens on the screening cells.

Adult↗
PubMed1973

The pathogenesis of Aleutian disease of mink. 3. Immune complex arteritis.

Mink chronically infected with Aleutian disease virus develop a severe necrotizing arteritis affecting muscular arteries. Acute, subacute and healing lesions may be found. Extracellular deposits of host immunoglobulin and complement and, after acid elution, viral antigen can be shown by immunofluorescence technics in areas of fibrinoid necrosis and between proliferating endothelial cells. No intracellular viral antigen was found, indicating that the virus probably does not replicate in vascular structures. The arteritis of Aleutian disease appears to be the result of immune complex deposits in vessel walls.

Aleutian Mink Disease↗