COM 0212.428 1996-1998 - Laserfiche WebLink

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COUNCIL FOR AGRICULTURAL SCIENCE AND TECHNOLOGY listed in Table 3. The parasitic nematode Trichnre(!n Cumpylubncrer, 99.999+~/0 0( F_. coli 0157:H7 (Figure spirn/is~. the bovine and pork tapeworms Cce~tir•crcrrc I 99.9+7r of Salurnrre/la (Figure I and 99.999+% of boric antl Crsrirercus ce/lu/recdc~.:mtl the protozoan Stnpln•/~c•nrcu.rcells would ba.killed. These results were Parasite Trzrnp/usnur gnndii arc all inactivated by ion- calculated assumingirtadiationatatemperatureof4l°F. izing radiation doses below LS kGy. E.~rbrrrr/rin cuA Ivrthcr, for Snbnunella. a ruher high resistance value 0157:}17. [.isterirr nrnanc_vtn,grnec. Srrbnunrllnr spp., ul 0.70 kGy was used for Sulnurec•llu based on the radi- Srnphcloc•nccu.r nureu.r. and other loodhorne bacterial ;Ilion resistance of a mixture of five Sabnnne(lu strains. pathogens can be eliminated or dccrcasat si~nifirmtly Sono stminc i ,Sa/mnnellrr arc much less radiation re- innumber by treatment of meat or poultry with Pasteur- sisuuu than this mixture and when present in foods such ir.ing ionizing radiation doses above I.i kGy but below as e__s, which have higher water contents than meats 10 kGy (Table 21. tin, mill he even more sensitive to irr:utiatirnt. Suhmis- l'he approved minimum lonizine radiation dose .inn of a petition to the FDA and USDA to approve low for treatment nl poultry is I.i kGy, and the maximum dose irtadiation (0.6 to 15 kGy) to control SnbnnneHo dose is 3.0 kGy. The FDA currently is crntsickrin~ ? infections in Fresh seholc eggs in intact ,hells is pend- pctition From industry for approval In irtadiate nan(ro- ins. znn red meats \vith a maximum dose of -Li kGy and ~ In general. the radiation sensitivities of a baeteri- frozen red meats with a maximum do.c of 7.0 kGy ?r al pathogen in meat and in poultry are not substantially control londhornc pathogens. Let us a.wntc that ? tar different. Addition or removal of substanti:d amounts of ^_et dose of 2.g kGy ought be chosen Ibr the irradiation water or of salt, however. may ;titer the radiation sensi- of heel: Such a etrcet \cill be set so th;u the minimum tivities of pathogens in processed meat or poultry. Ac- :md maximum doses received h}' [he product meet rcg- to;tl number and percentage of cells that will be killed ulatory requirements. IF the majrnity of dte product re- by irradiation depend on carious factors such as patho- ceived kG}'. then appru.xintatalc 9x).9999+4: of ~•cn. ,•ro\vth scree. absorbtd radiation dose, irradiation- Ilim' ICnIpcl:d Ul'C. UU' ~cn prc.cnCC. :Ind walCr cunlCnl. Rnistancc of bacterial pathogens is substantially greater 99'999999 at freezing tempenturcs: these effects. however, have 99.99999 been dctcrmined For most pathoeens and arc considered E ccL 0157.H7 Salmonell,r 99.9999,E in lhC selection of appropriate radiation doses. Bac[eri- ' al pathogens differ crntsidcrably in their sensitivity to ' 949991- ° iunliin_ mebmion.:uul spore-forming hacteri:I:md Ibnd- 1 99.99 naareu ur I borne ci ru sec arc suhu:tntially more resist:mt than arc I v~ ~ ~ I L 99.9 F- ~ 0 ~ purely cccetativc forms n(hactcria (Table 2). ' a L v Spore-forming bacterial pathogens of the genera 99 irrnarnanorr ~ ioeur.lulnrr Iurrdhn and Clacrrrdiurn ;Ire more xcnsluve to heal aG 90 F FoooeonNe ~ aanr~ceec; Icr vradi;uinn even though the actual numbers may be o~ ~ ?II'cctctl only slightly by pasteurization closes of radio- I 0 7 2 3 Radlauon dose IkGy) nun. The Few non.cpnrc-limning bacteria that may sur- cice irradiation arc injurctl severely and become much Figure 1. The percentage ofEscherichia coli0157:H7orSal- nutre sensitive to hcut. They' arc, therefore, ve unlikely monella contaminating meat or poultry by treat- rY ment with ionizing radiation doses of 0 to 3 ki- m survive cooking. lograys (kGy) at a temperature of 41 °F. The symbol at the lower right of the ligure is the rndura symbol }}till •\Sb SIIEh LFI511 thathns been adoptedinternationnlly asalabelfor Dish and ahclllish:Irrsignilic;uusourcesufl0od- irradiatedfood. Inaddition, the U.S. Food and Drug Administration requires that the label include the I'Orne Pathogens. And irradiation has been demonstrat- wortls"Treated with radiation"or "treated byirradi- ed to control SrdumneUn. Shi•gc•l/n. Stnpln~/ncoccus nu- ation"and"keep refrigerated"or "keep frozen." reus, enteropathocenic E.ccherichin roll, Vibrio