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Titolo:
Application of Sartwell's model (lognormal distribution of incubation periods) to age at onset and age at death of foals with Rhodococcus equi pneumonia as evidence of perinatal infection
Autore:
Horowitz, ML; Cohen, ND; Takai, S; Becu, T; Chaffin, MK; Chu, KK; Magdesian, KG; Martens, RJ;
Indirizzi:
Texas A&M Univ, Coll Vet Med, Dept Large Anim Med & Surg, College Stn, TX 77843 USA Texas A&M Univ College Stn TX USA 77843 & Surg, College Stn, TX 77843 USA Kitasato Univ, Sch Vet Med & Anim Sci, Dept Anim Hyg, Towada, Aomori 034, Japan Kitasato Univ Towada Aomori Japan 034 Anim Hyg, Towada, Aomori 034, Japan Equine Clin, Capitan Sarmiento, Argentina Equine Clin Capitan Sarmiento Argentina n, Capitan Sarmiento, Argentina Texas A&M Univ, Coll Sci, Dept Stat, College Stn, TX USA Texas A&M Univ College Stn TX USA ll Sci, Dept Stat, College Stn, TX USA Univ Calif Davis, Coll Vet Med, Dept Med & Epidemiol, Davis, CA 95616 USA Univ Calif Davis Davis CA USA 95616 Med & Epidemiol, Davis, CA 95616 USA
Titolo Testata:
JOURNAL OF VETERINARY INTERNAL MEDICINE
fascicolo: 3, volume: 15, anno: 2001,
pagine: 171 - 175
SICI:
0891-6640(200105/06)15:3<171:AOSM(D>2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Soggetto:
CORYNEBACTERIUM-EQUI; DISEASES; NORMALITY; PLASMA; HORSES;
Keywords:
epidemiology; horses; natural history;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
24
Recensione:
Indirizzi per estratti:
Indirizzo: Cohen, ND Texas A&M Univ, Coll Vet Med, Dept Large Anim Med & Surg, College Stn, TX 77843 USA Texas A&M Univ College Stn TX USA 77843 llege Stn, TX 77843 USA
Citazione:
M.L. Horowitz et al., "Application of Sartwell's model (lognormal distribution of incubation periods) to age at onset and age at death of foals with Rhodococcus equi pneumonia as evidence of perinatal infection", J VET INT M, 15(3), 2001, pp. 171-175

Abstract

The distributions of the incubation periods for infectious and neoplastic diseases originating from point-source exposures, and for genetic diseases.follow a lognormal distribution (Sartwell's model). Conversely. incubationperiods in propagated outbreaks and diseases with strong environmental components do not follow a lognormal distribution. In this study Sartwell's model was applied to the age at onset and age at death of foals with Rhodococcus equi pneumonia. The age at onset of clinical signs and age at death were compiled for 107 foals that had been diagnosed with R equi pneumonia at breeding farms in Argentina and japan. For each outcome (disease and death),these data followed a lognormal distribution. A group of 115 foals with colic from the University of California were used as a comparison group. The age at onset of clinical signs for these foals did not follow a lognormal distribution. These results were consistent with the hypothesis that foals are infected with R equi during the ist several days of life, similar to a point-source exposure.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/01/20 alle ore 01:31:41