f f f BIO250L
(lab 6) Straighterline microbiology lab
BIO250L food microbiology worksheet
2025 100% Pass Score
StudentfName:
AccessfCodef(locatedfonfthefundersidefofftheflidfoffyourflabfkit):
Pre-LabfQuestions
1. Escherichiafcolifisfonefoffthefmostfcommonfcausesfofffoodbornefillness,fyetfitfisfalsofafcommonfmi
croorganismffoundfwithinfthefhumanfgut.fWhatfexplainsfthisfdisparity?
E.fcolifisfafbacteriafthatfprimarilyflivesfinfthefintestinesfandfnormallyfhasfnofnegativefeffectsfonfthefh
ealthfoffthefintestines.fHowever,fsomefstrainsfoffpathogenicfE.fcoli,fparticularlyfthosefthatfgeneratef
Shigaftoxin,farefmoreflikelyftofcontaminateffoodfandfwaterfsuppliesfand,fiffconsumed,fcanfcauseffoo
dbornefdiseases.fThisfinformationfwasfgivenfbyfthefAmericanfFoodfandfDrugfAdministration.
2. Therefarefseveralffoodsfandfbeveragesflistedfinfthisflabfthatfarefcreatedfthroughfthefactionsfoffmicr
oorganisms.fNameffivefofftheffoodsfandfthefspecificfmicroorganismsfthatfarefusedftofmakefeachfofft
hem.
SaccharomycesfcerevisiaefandfLactobacillusfcanfbefdetectedfinfsourdoughfbread,fwhereasfSwissfc
heesefcontainsfPropionibacteriumffreundenreichii.fBeerfcontainsfSaccharomycesfpastorianus,fSac
charomycesfcerevisiaefand,fandfkimchifcontainsLactobacillusfplantarumfandfLeuconostocfmesent
eroides.fThefmicrobesfthatfproducefvinegarfarefAcetobacterfandfGluconobacter.
, Lab 6 Food Microbiology
f f f BIO250L
3. UsingfanfonlinefresearchftoolfsuchfasfthefA-ZfindexfonfthefCDCfwebsite,fexplainfwhyfListeria
monocytogenesfisfafmajorfthreatftofpregnantfwomenfandftheirfdevelopingffetuses,fwhofareftenftimes
fmoreflikelyftofgetfsickfthanfotherfdemographicfgroups.
Listeriafisfafbacteriafthatfisffrequentlyfdiscoveredfinfvegetables,fparticularlyfunpasteurizedfdairyfpro
ducts.fThefCentersfforfDiseasefControlfandfPreventionf(CDC)