摘要:

ABSTRACTThe popularity of Cajun cuisine has promoted the consumption of Louisiana crayfish, Procambarus clarkii. Tail meat and hepatopancreatic tissues of crayfish captured from two locations in the Atchafalaya River Basin and four open ponds were analyzed separately for xenobiotic metal and mineral composition using an inductively coupled plasma emission spectrometer (ICP) and chlorinated hydrocarbons by gas chromatograph (GC) with electron capture detector. Less than 3 mg/kg of toxic xenobiotic metals were found in the tail meats and less than 5 mg/kg in the hepatopancreatic tissues. Mineral concentrations were similar to those reported for other crustacean species. Occasional trace amounts of DDD and DDE were found present in tissue samples.

ISSN:0149-6085    

DOI:10.1111/j.1745-4565.1991.tb00062.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

ABSTRACTToxoplasmosis, a disease of mammals and birds, is caused by the obligate intracellular protozoan parasite, Toxoplasma gondii.It is believed that approximately half of the human population of the U.S. is infected and that 500 million of the world population demonstrate a positive serological reaction to the parasite. Only a small percentage of the infected individuals show symptoms: however, in immunocompromised persons, the disease can be quite severe and even fatal. The infectious agent is generally foodborne and is due to the ingestion of raw or undercooked meats derived from infected animals. In this review, several aspects of theT. gondiiorganism, including its survival, its distribution in the environment and animals, its presence and survival in foods, role of virulence factors, and its transmission to humans, are reviewed. In addition, human toxoplasmosis, its treatment and prevention, and the economic aspects of the disease are discussed.

ISSN:0149-6085    

DOI:10.1111/j.1745-4565.1991.tb00063.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

ABSTRACTBoth fresh and frozen chicken meat were evaluated for microbiological status by screening for total bacterial counts and for the presence of pathogens like Enterobacteria, Bacillus cereus,coagulase positive Staphylococci andSalmonellaspp. Most of the samples exhibited heavy bacterial contamination (1.2 × 105‐ 2.6 × 106/g), mainly withStaphylococcusspp. (1.5 × 104‐ 2.8 × 105/g). All the chicken samples also showed the presence of Salmonellae (3 × 101‐ 2.1 × 102/g). Among the different serotypes observed in chickens. S. typhimuriumwas common in fresh as well as frozen chicken. Radicidation at 2 kGy at cryogenic conditions (−40°C) was efficient in eliminating the natural pathogenic contamination of the poultry. Salmonellaspp. viz.S. seftenbergandS. typhimuriumdiffered in radiation sensitivity, the D10values in phosphate buffer (pH 7.2) being 0.25 kGy and 0.12 kGy, respectively. Chicken homogenate (10%) offered approximately 2‐fold protection to these cells. Chicken samples artificially inoculated with a heavy inoculum (108cells/g) of these 2 serotypes required higher gamma radiation doses of 4–5 kGy. The findings suggested that a dose of 2 kGy is adequate for normally contaminated chicken samples, but for the heavily contaminated chicken a dose of 4–5 kGy, depending upon the predominatingSalmonellaserotype

ISSN:0149-6085    

DOI:10.1111/j.1745-4565.1991.tb00064.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

ABSTRACTVibrio metschnikovii,a potentially pathogenic marine bacterium, was recovered from a wide variety of finfish and shellfish purchased at fish markets and supermarkets. Because limited information is available on the occurrence of this organism in food products and human disease, the observations may be relevant to public health considerations of seafood consumption.

ISSN:0149-6085    

DOI:10.1111/j.1745-4565.1991.tb00065.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

ABSTRACTAn appreciable percentage of electric power is generated by oil‐fired power plants. The ash resulting from such plants is typically very high in elements such as vanadium, nickel, aluminum and molybdenum. Oil bottom ash and fly ash when disposed or fly ash fallout from such power plants could result in absorption of such metals by agricultural crops. Swiss chard(Beta vulgarisL.) was grown in potted soils amended with oil bottom ash and fly ash at 2% and 1% (w/w), respectively. The crop absorbed significantly higher concentrations of each of the metals as compared to those in the control crop grown on soil alone. Higher levels of the ashes in soil resulted in phytotoxicity to the swiss char

ISSN:0149-6085    

DOI:10.1111/j.1745-4565.1991.tb00066.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

ISSN:0149-6085    

DOI:10.1111/j.1745-4565.1991.tb00067.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY