lisbey "How common is it for babies to be seriously ill from incorrectly made formula? (where there is a good quality water supply and generally decent hygiene standards) I have never heard of one."
- well look up the thread to frakkit's post which was "a baby at church got very, very sick from enterobacter sakazaki which is found in formula so it really does happen and it's serious."
The think is - this particular problem has NOTHING to do with either the water supply or hygiene standards during preparation. It is to do mainly with Enterobacter sakazakki.
From the WHO guidelines
Powdered infant formula (PIF) has been associated with serious illness and death in infants due to infections with Enterobacter sakazakii.
During production, PIF can become contaminated with harmful bacteria, such as
Enterobacter sakazakii and Salmonella enterica. This is because, using current manufacturing technology, it is not feasible to produce sterile PIF.
During the preparation of PIF, inappropriate handling practices can exacerbate
the problem.
Recognizing the need to address such hazards in PIF, Codex Alimentarius decided to revise the Recommended International Code of Hygienic Practice for Foods for Infants and Children.
In doing so it requested specific scientific advice from the Food and Agriculture Organization of the United Nations (FAO) and the World Health
Organization (WHO). FAO and WHO have provided this advice in the reports of two expert meetings held in 2004 and 2006 on Enterobacter sakazakii and other microorganisms in powdered infant formula (PIF). Part of this advice included recommendation to develop guidelines for the preparation of PIF.
The World Health Assembly (WHA) of WHO requested in 2005 the Organization to develop such guidelines on the safe preparation, handling and storage of PIF in order to minimize the risk to infants.
The FAO/WHO advice on E. sakazakii in PIF includes a quantitative microbiological risk assessment of E. sakazakii
in PIF.
One of the aspects of the risk assessment was to determine relative risk reduction associated with different preparation, storage and handling scenarios.
The recommendations made in the present guideline document are largely based on the findings of the quantitative risk assessment. No risk assessment was carried
out for Salmonella, but the group reported that the basic risk control principles for E. sakazakii would also hold true for S. enterica.
In general, sterile liquid infant formula is recommended for infants at the highest risk of infection. Where sterile liquid infant formula is not available, preparation of PIF with water at a temperature of no less than 70 °C dramatically reduces the risk. Minimizing the time from preparation to consumption also reduces the risk, as
does storage of prepared feed at temperatures no higher than 5 °C.
If you want to see an upsetting film about this see here .