PubMed Health⌕ Search

Biomedical subjects

C Coss

Publications and source records attributed to C Coss.

5 recordsLinked to original sources
PubMed2006

Effects of time and temperature on the viability of Toxoplasma gondii tissue cysts in enhanced pork loin.

Enhanced or pumped pork products represent a significant proportion (40 to 50%) of the commercially available pork cuts available to consumers at the retail level. In a previous study, pork loins containing viable Toxoplasma gondii tissue cysts were pumped with solutions containing 2% sodium chloride or 1.4% or higher potassium or sodium lactate and stored at 4 degrees C for 7 days. This treatment prevented transmission of T. gondii to cats. In the present study, enhanced pork loins were stored for 0, 8, 16, 24, 32, or 40 h at 4 degrees C and then fed to T. gondii-seronegative cats to determine how quickly the loss of tissue cyst viability occurred. In a second experiment, pork loins collected from pigs experimentally infected with T. gondii were stored at temperatures found in retail meat cases and then fed to T. gondii-seronegative cats to determine the effect of typical meat case storage temperatures on tissue cyst viability. In both experiments, cat feces were examined for 14 days after the infected meat meal to assess oocyst shedding. The results indicate that solutions containing 2% sodium chloride or 1.4% potassium or sodium lactate are effective within 8 h of injection for killing T. gondii tissue cysts in pork loins and that storage at meat case temperatures at or below 0 degrees C (32 degrees F) for 7 days also killed T. gondii tissue cysts in pork loins.

Animals↗
PubMed2005

Trichinella nativa in a black bear from Plymouth, New Hampshire.

A suspected case of trichinellosis was identified in a single patient by the New Hampshire Public Health Laboratories in Concord, NH. The patient was thought to have become infected by consumption of muscle larvae (ML) in undercooked meat from a black bear killed in Plymouth, NH in October 2003 and stored frozen at -20 degrees C fro 4 months. In January 2004, a 600 g sample of the meat was thawed at 4 degrees C, digested in hydrochloric acid and pepsin, and larvae were collected by sedimentation. Intact, coiled, and motile ML were recovered (366 larvae per gram (l pg) of tissue), which were passed into mice and pigs. Multiplex PCR revealed a single 127 bp amplicon, indicative of Trichinella nativa. The Reproductive Capacity Index (RCI) for the T. nativa-Plymouth isolate in mice was 24.3. Worm burdens in the diaphragms of two 3-month-old pigs given 2,500 ML were 0.05 and 0.2l pg by 35 days post-inoculation, while 2.2 and 0.75 l pg were recovered from two 3-month-old pigs given 10,000 ML; no larvae were recovered from four 1-year-old pigs given 2,500 ML (n=2) or 10,000 ML (n=2). Viable larvae were also recovered from frozen black bear meat harvested at two additional locations, one in southern Ontario, Canada, and one in upstate New York, USA. Multiplex PCR using genomic DNA from these parasite samples demonstrated that both isolates were T. nativa. This is the first report of the freeze-resistant species, T. nativa, within the continental United States.

Animals↗
PubMed1994

Chromosomal localization of genes required for the terminal steps of oxidative metabolism: alpha and gamma subunits of ATP synthase and the phosphate carrier.

The terminal steps of oxidative phosphorylation include transport of phosphate and ADP into the mitochondrial matrix, synthesis of ATP in the matrix, and transport of the product ATP into the cytosol where it can be utilized to perform cellular work. Three nuclear genome encoded membrane proteins, namely, the phosphate carrier (PHC), the adenine nucleotide carrier (ANT), and the ATP synthase complex, consisting of at least 13 individual subunits, catalyze these reactions. The locations of the alpha and gamma subunits of the mitochondrial ATP synthase complex and the mitochondrial phosphate carrier, PHC, on human chromosomes were determined using cloned rat liver cDNA as probes. Human homologues of the alpha subunit are on chromosomes 9 and 18, the gamma subunit are on chromosomes 10 and 14, and the PHC was localized to chromosome 12.

Animals↗
PubMed1993

Genetic and physical mapping of the Treacher Collins syndrome locus with respect to loci in the chromosome 5q3 region.

Treacher Collins syndrome is an autosomal dominant, craniofacial developmental disorder, and its locus (TCOF1) has been mapped to chromosome 5q3. To refine the location of the gene within this region, linkage analysis was performed among the TCOF1 locus and 12 loci (IL9, FGFA, GRL, D5S207, D5S210, D5S376, CSF1R, SPARC, D5S119, D5S209, D5S527, FGFR4) in 13 Treacher Collins syndrome families. The highest maximum lod score was obtained between loci TCOF1 and D5S210 (Z = 10.52; theta = 0.02 +/- 0.07). The best order, IL9-GRL-D5S207/D5S210-CSF1R-SPARC-++ +D5S119, and genetic distances among these loci were determined in the 40 CEPH families by multipoint linkage analysis. YAC clones were used to establish the order of loci, centromere-5'GRL3'-D5S207-D5S210-D5S376-CSF1R -SPARC-D5S119-telomere. By combining known physical mapping data with ours, the order of chromosome 5q3 markers is centromere-IL9-FGFA-5'GRL3'-D5S207-D5S210- D5S376-CSF1R-SPARC-D5S119-D5S209- FGFR4-telomere. Based on this order, haplotype analysis suggests that the TCOF1 locus resides distal of CSF1R and proximal to SPARC within a region less than 1 Mb in size.

Base Sequence↗