geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

The response of susceptible chickens to graded doses of the virus of visceral lymphomatosis


, : The response of susceptible chickens to graded doses of the virus of visceral lymphomatosis. Poultry Sci 35(1): 17-26

A study involving 1458 South Carolina White Leghorn chickens was made of the relation between the dose of the virus of visceral lymphomatosis (VL) and the response of the chickens over periods of 200 and 270 days when the material was given by the intraperi-toneal route. Filtered plasma and lymphomatous liver filtrates from strain RPL 12 inoculated birds were the inoculums used in graded doses in 4 experiments. The primary response was the development of VL. Deaths occurred as early as 22 days after inoculation in a high dosage lot and continued in the low dosage lots for as long as the chickens were kept. Range in incidence was from a low of 55.5% in a low dosage lot to a high of 90.1% in a high dosage lot, with an average age at death of 128.2 and 55.6 days in the same lots, respectively. In the intermediate dosage range, increases in dose caused step-wise increase in percentage of VL that occurred in 200 days but increases were small for each 10-fold increase in dose. A greater rate of change was noted in the average age at death which decreased rapidly with increases in dose. Based on the microscopic location of neoplastic cells, all cases of VL were classified into 1 of 2 types; namely intravascular or extravascular. The percentage of intravascular VL increased rapidly with an increase in dose but incidence of extravascular was inversely related to dose. A low but significant percentage of osteopetrosis also occurred in all inoculated lots. A consistent relation between dose and incidence of this bone disease was not obtained in 3 experiments, and an apparent inverse relation with dose was obtained in 1 experiment. Females were slightly more susceptible to VL, whereas males were slightly more susceptible to osteopetrosis.

US$19.90

DOI: 10.3382/ps.0350017


Other references

Barretto, A.C.; Cuba, C.A.C.; Marsden, P.D.; Vexanat, J.A.; Belder, M. de, 1981: Epidemiological characteristics of cutaneous american leishmaniasis in an endemic region of Bahia, Brazil. I. Human leishmaniasis. An examination was made of 853 persons in a village in SE Bahia, Brazil. 82 (9.6%) showed active lesions of leishmaniasis (67% were cutaneous and 33% mucocutaneous) and 161 (18.8%) showed scars. Apparently the infection is no longer transmitted in...

Coberg, A.; Lynch, D.; Mavretish, B., 1991: Restraints in the 90s. Harnessing ideas to release restraints. Geriatric Nursing 12(3): 133-134

Anistratenko V.V., 2002: Heterochronous periods and homologous clusters in the development of Tertiary malacofauna in eastern Paratethys. The concept of heterochronous periodism in the development of the Tertiary malacofauna in the Eastern Paratethys basins has been proposed. The Mediterranean fauna had been transforming into the reach endemic brackish-water faunal complex and then...

Ferreira Gomez, A., 1950: First experiences with streptomycin therapy in gynecology and obstetrics. Clinica Y Laboratorio 49(289): 288-294

Lieberman, J.A.; Sloan, J., 1994: The moral imperatives of medical research in human subjects. Journal of the California Alliance for the Mentally Ill 5(1): 40-42

Ruggiero, F.; Pfäffle, M.; von der Mark, K.; Garrone, R., 1988: Retention of carboxypropeptides in type-II collagen fibrils in chick embryo chondrocyte cultures. An antibody reacting with the C-propeptide of chick type-II procollagen was used in an attempt to localize this terminal extension of the procollagen molecule (by immunogold labelling) during early collagen fibrillogenesis in chondrocyte cultures....

Bitterli T., 1988: Speleologic explorations in the Hohgant-Sieben Hengste-Beatenberg area. Cavernes 32(1): 9-17

Zhang, N.; Aebersold, R.; Schwikowski, B., 2002: ProbID: a probabilistic algorithm to identify peptides through sequence database searching using tandem mass spectral data. With the recent quick expansion of DNA and protein sequence databases, intensive efforts are underway to interpret the linear genetic information of DNA in terms of function, structure, and control of biological processes. The systematic identific...

Altman, J.A., 1969: Wedge-saw progress report. Describes and illustrates the prototype of a new chain saw designed for felling hardwoods in pulpwood logging operations and adaptable for fitting to any type of skidder. Shears are not able to fell the larger hardwood trees, and their use causes...

Seong Soo Hong, Han Jun Jin, 2013: Assessment of association of ACTN3 genetic polymorphism with Korean elite athletic performance. Genetic and environmental factors have long been suspected to influence on physical performance and athletic ability. Recent studies have suggested that the skeletal-muscle actin binding protein ?-actinin-3 (<em>ACTN3</em>) gene was as...