My humble apologies but there was a significant typo in the post I sent
yesterday concerning the repeated food poisoning episodes. The Bacillus
cereus count for the milk was >5000 CFU/g (and not <10 CFU/g as posted
yesterday.) The (corrected) results are as follows:
> Lab Results
>> Date: June 1, 1995
>> Cheese Units Methods
>> Aerobic Plate Count 35 deg. C 2.4E6 CFU/g pour
> Presumptive Coliforms <3 MPN/g mpn fd
> Faecal Coliforms Nil MPN/g mpn fd
> Coag positive Staphylococci <10 CFU/g spread
> Bacillus Cereus <10 CFU/g spread
> Clostridium perfringens <10 CFU/g spread
>> Mushrooms
>> Aerobic Plate Count 35 deg. C 1.7E6 CFU/g pour
> Presumptive Coliforms 1100 MPN/g mpn fd
> Faecal Coliforms <3 MPN/g mpn fd
> Coag positive Staphylococci <10 CFU/g spread
> Bacillus Cereus <10 CFU/g spread
> Clostridium perfringens <10 CFU/g spread
>> Milk
>> Aerobic Plate Count 35 deg. C 7.2E4 CFU/g pour
> Presumptive Coliforms <3 MPN/g mpn fd
> Faecal Coliforms Nil MPN/g mpn fd
> Coag positive Staphylococci <10 CFU/g spread
> Bacillus Cereus >5000 CFU/g spread
> Clostridium perfringens <10 CFU/g spread
>>> Mata Paneer
>> Aerobic Plate Count 35 deg. C - CFU/g pour
> Presumptive Coliforms - MPN/g mpn fd
> Faecal Coliforms - MPN/g mpn fd
> Coag positive Staphylococci - CFU/g spread
> Bacillus Cereus - CFU/g spread
> Clostridium perfringens Absent /g spd/en
> Clostridium perfringens - CFU/g spread
> Staphylococcal Enterotoxin - - immuno
>> Tofu
>> Aerobic Plate Count 35 deg. C 8.4E6 CFU/g pour
> Presumptive Coliforms >1100 MPN/g mpn fd
> Faecal Coliforms <3 MPN/g mpn fd
> Coag positive Staphylococci <10 CFU/g spread
> Bacillus Cereus <10 CFU/g spread
> Clostridium perfringens Absent /g spd/en
> Clostridium perfringens <10 CFU/g spread
> Staphylococcal Enterotoxin Absent - immuno
>> Methods of Analysis:
>> immuno By immunoassay
> mpn fd MPN Method for Foods
> pour Pour Plate Enumeration
> spd/en Spread Plate/Selective Enrich
> spread Spread Plate Enumeration
>> Comments:
>> Results apply to samples as received. Methods used are Public
> Health Laboratory Methodologies of the Institute of Environmental
> Science and Research (ESR).
>> Coagulase positive Staphylococcus aureus was isolated from the
> mushrooms in low numbers.
>> The only significant result from the foods tested was the
> Bacillus cereus count obtained from the organic milk. However,
> due to this product having exceeded the best before date, this
> result cannot be tied to the quality of the milk before it
> reached the best before date. It is recommended that products
> which have reached the best before date should not be consumed.
> It this product was consumed after the best before date, it is
> quite possible that it may have been the cause of the symptoms
> exhibited by the patients. It is not known whether the
> pasteurization process that the organic milk was put through was
> adequate. This could mean that Bacillus cereus organisms may
> have been present in the milk and were able to multiply to the
> levels found in the sample tested.
>> Date: June 26, 1995
>> Item Yeast & Mould Staphylococcus Bacillus
> (c.f.u. per g) aureus (c.f.u. cereus
> per g) (c.f.u. per g)
>> oat water batch <10 <10 <100
>> rolled oats batch <10 <10 <100
>> Uncle Tobys <10 <10 <100
> traditional oats
>>> Methods used are those laid down by the Association of Official
> Analytical Chemists in the 7th Edition of the Bacteriological
> Analytical Manual 1992.
> The Compendium of Methods for the Microbiological Examination of
> Foods. 3rd Edition, 1992.
>
