Publications

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a regional food-frequency questionnaire for the us mississippi delta.to describe food sources of nutrient intake for white and african american adults in the lower mississippi delta (lmd), and their use in the development of a regional food-frequency questionnaire (ffq) based on an earlier version of the national cancer institute's health habits and history questionnaire.200515705249
bolbophorus damnificus n. sp. (digenea: bolbophoridae) from the channel catfish ictalurus punctatus and american white pelican pelecanus erythrorhynchos in the usa based on life-cycle and molecular data.the common pathogenic prodiplostomulum metacercaria in the flesh, mostly near the skin, of pond-produced channel catfish ictalurus punctatus has been demonstrated to be bolbophorus damnificus overstreet & curran n. sp. the catfish acquires the infection from the snail planorbella trivolvis, the only known first intermediate host, and the species is perpetuated through the american white pelican pelecanus erythrorhynchos, as confirmed by experimental infections with nestling and dewormed adult pe ...200212075128
high incidence of glomerulonephritis associated with inclusion body hepatitis in broiler chickens: routine histopathology and histomorphometric studies.during the routine histologic evaluation of an outbreak of inclusion body hepatitis (ibh) in mississippi broilers, a high incidence of renal enlargement and glomerulonephropathy was observed in the birds presenting classic hepatic pathology. characteristic intranuclear adenoviral inclusion bodies were demonstrated in the livers of these birds, and fowl adenovirus was identified by viral isolation and by pcr. the glomerular lesions were consistent with proliferative or membranoproliferative forms ...201020945776
genotypic and phenotypic variation of selected saint louis encephalitis viral strains isolated in california.the mechanism for long-term maintenance of st. louis encephalitis (sle) virus in california is unknown. two possibilities are 1) that the virus is maintained locally in discrete enzootic foci by one or more reservoir mechanisms, and/or 2) that the foci are ephemeral in nature and virus is reintroduced periodically from other enzootic areas by migratory birds or movement of vectors. we have investigated these epidemiologic alternatives by studies of genetic variation within a 277 nucleotide porti ...19979288820
risk factors associated with detection of salmonella in broiler litter at the time of new flock placement.in this study, we investigated risk factors associated with the probability to detect salmonella in samples of litter collected within 2 h prior to new flock placement in 76 grow-out houses on 38 conventional broiler farms located in the us states of mississippi, alabama and texas. we evaluated characteristics of location and layout of the farm; area adjacent to and surrounding the house; house construction; condition and type of equipment in the house; litter management and other production, sa ...201120202186
outbreak of campylobacter enteritis associated with cross-contamination of food--oklahoma, 1996.on august 29, 1996, the jackson county health department (jchd) in southwestern oklahoma notified the oklahoma state department of health (osdh) of a cluster of campylobacter jejuni infections that occurred during august 16-20 among persons who had eaten lunch at a local restaurant on august 15. this report summarizes the investigation of these cases and indicates that c. jejuni infection was most likely acquired from eating lettuce cross-contaminated with raw chicken. this report also emphasize ...19989498294
epidemiology and effect on production parameters of an outbreak of inclusion body hepatitis in broilers.in 2007, an inclusion body hepatitis (ibh) outbreak affected several broiler farms in mississippi. results of logistic regression analyses showed significant associations between ibh occurrence and high enzyme-linked immunosorbent assay geometric mean titers for infectious bursal disease virus. however, there was no association between ibh occurrence and chicken infectious anemia virus status. results of linear regression model analyses showed significant associations between ibh occurrence with ...201020408402
sequence comparisons of the variable vp2 region of eight infectious bursal disease virus isolates.the vp2 gene is part of the genomic segment a of infectious bursal disease virus (ibdv). it has been identified as the major host-protective antigen of ibdv and is known to contain conformationally dependent protective epitopes. a 643-base pair segment covering the hypervariable region of this gene from three recent serologic variant ibdv isolates from the southeastern united states, two variants from the delmarva peninsula, and three serologic standard viruses were amplified and sequenced using ...19979087318
disseminated histoplasmosis in persons infected with human immunodeficiency virus.disseminated histoplasmosis is an aids-defining illness that occurs in about 5% of aids patients residing in histoplasmosis-endemic areas of the united states (the mississippi and ohio river valleys). this disease develops as a result of acute infection and perhaps also as the result of reactivation of latent infection: cases reported from areas such as new york city, where histoplasmosis is not endemic, are most likely due to reactivation of an infection acquired earlier in a histoplasmosis-end ...19958547497
epidemiology of reticuloendotheliosis virus in broiler breeder flocks.six broiler breeder flocks from two companies in mississippi were tested at intervals for reticuloendotheliosis (re) virus infection. virus was isolated and antibody demonstrated in all six flocks. infection was first detected at ages ranging from 13 to 47 weeks. studies showed that neither congenital transmission from grandparent flocks nor treatment with contaminated vaccines was a likely source of infection; thus, exposure to re virus was assumed to come from the environment. virus was isolat ...19853008697
rhipicephalus sanguineus: vector of a new spotted fever group rickettsia in the united states.a rickettsia related to but distinct from the spotted fever agent, rickettsia rickettsii, has been detected in 167 (18.9%) of 884 rhipicephalus sanguineus taken off dogs in central and northern mississippi. the organisms could readily be isolated in male meadow voles (microtus pennsylvanicus), where it produced massive infections in the tissues of tunica vaginalis. it was practically nonpathogenic for male guinea pigs, although inoculation of these animals with infected tunica vaginalis of voles ...1975806533
attempts to reproduce a runting/stunting-type syndrome using infectious agents isolated from affected mississippi broilers.various organisms, including 12 aerobic and 2 anaerobic bacteria, an infectious bronchitis virus (ibv), a reovirus, and 2 bacteriophages, were isolated from intestinal tracts of commercial broiler chicks undergoing a runting/stunting-type condition. in a series of trials, these agents were given alone and in combination to 1-day-old chicks in an attempt to reproduce the field condition. because the agents were isolated and evaluated over time, an augmented designs variation of the analysis of va ...19979087323
arbovirus studies in the ohio-mississippi basin, 1964-1967. vi. mermet: a simbu-group arbovirus. 19694980380
elevated tcdd in chicken eggs and farm-raised catfish fed a diet with ball clay from a southern united states mine.the u.s. food and drug administration (fda) terminated the use of ball clay from a mine in mississippi as an additive in animal feed after discovering nanogram per gram concentrations of 2,3,7,8-tetrachlorodibenzo-p-dioxin (2,3,7,8-tcdd). the fda collected chicken eggs and farm-raised catfish in affected areas and throughout the remaining continental united states to assess levels of 2,3,7,8-tcdd. a new method using quadrupole ion storage tandem-in-time mass spectrometry (qistms) measured the 2, ...199910585021
factors associated with introduction of infectious laryngotracheitis virus on broiler farms during a localized outbreak.we analyzed factors involved in the introduction of infectious laryngotracheitis (ilt) virus (iltv) onto broiler farms during a localized outbreak in an immunologically naive broiler population. the outbreak occurred in the state of mississippi, united states in 2002-2003. from the responses to a retrospective survey questionnaire administered via personal interviews, 181 farm-level risk factors were defined and analyzed for their association with iltv introduction using logistic regression. the ...201223050469
a 5-year retrospective report of gallibacterium anatis and pasteurella multocida isolates from chickens in mississippi.a 5-yr retrospective study (november 2006-december 2011) was conducted to determine the isolation frequency of pasteurella multocida and gallibacterium anatis and their antibiograms from chickens submitted to the mississippi poultry research and diagnostic laboratory. the number of isolations of g. anatis increased over the last 5 yr in broiler and broiler breeder type chickens. for p. multocida, the number of isolations increased from 2006 to 2010, but decreased through 2011 with all isolations ...201324235226
isolation of type a influenza and newcastle disease viruses from migratory waterfowl in the mississippi flyway.twenty-seven chicken red blood cell agglutinating agents were isolated from 187 tracheal swabbings of apparently healthy migratory mallard ducks (anas platyrhynchos) in the mississippi flyway. twenty-four of the isolants were type a influenza virus; 3 lentogenic newcastle disease viruses were isolated. isolations were not made from either 65 giant canada geese (branta canadensis) or 60 franklins' gulls (larus pipixcan).1977924873
genetic relationships of infectious bronchitis virus isolates from mississippi broilers.a 582-base pair segment located in the nucleocapsid protein terminal part of the s1 gene of 26 arkansas (ark)-type infectious bronchitis virus (ibv) isolates from mississippi broilers was amplified and sequenced. reverse transcription-polymerase chain reaction and cycle sequencing techniques were used to elucidate the genetic and deduced amino acid relationships among the isolates. analysis suggested that the nucleotide and amino acid sequences of the isolates were highly conserved, with greater ...200010737646
virus characterization and sequence of the fusion protein gene cleavage site of recent newcastle disease virus field isolates from the southeastern united states and puerto rico.nine newcastle disease virus (ndv) isolates obtained from puerto rico, georgia, alabama, mississippi, and texas were analyzed for in vivo pathogenicity, biological properties (hemagglutination of mammalian erythrocytes), and for sequence variation at the amino acid and sense rna level of the fusion protein cleavage site. intracerebral pathogenicity index values ranged from 0 to 0.3 and the intravenous pathogenicity index obtained for all isolates was 0. four isolates hemagglutinated bovine eryth ...19968790890
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