Sources of contamination

Air:
spore formers:
a bacteria or other small life form that forms spores.
Bacillus:
http://www.safefood.net.au/AudienceHierarchy/TheBugBible/Bacillus+cereus+and+other+Bacillus+species.htm
http://www.textbookofbacteriology.net/Bacillus.html
Clostridium:
http://www.textbookofbacteriology.net/clostridia.html
non-spore formers:
Staphylococcus:
http://www.textbookofbacteriology.net/staph_2.html
Streptococcus:
http://www.textbookofbacteriology.net/streptococcus.html
http://www.textbookofbacteriology.net/S.pneumoniae.html
moulds:
Penicillium:
http://www.doctorfungus.org/thefungi/penicillium.htm
yeasts

H2O:
Pseudomonas:
http://emedicine.medscape.com/article/970904-overview
http://www.textbookofbacteriology.net/pseudomonas.html
E.Coli:
http://www.textbookofbacteriology.net/e.coli_2.html
Proteus:
http://web.uconn.edu/mcbstaff/graf/Student%20presentations/Proteus/Proteus.html
Micrococcus:
http://www.phac-aspc.gc.ca/msds-ftss/msds100e-eng.php
Bacillus subtilis

Raw materials
extensive and varied microflora

Packaging:
cardboard:
penicillium
Aspergillus:
http://www.doctorfungus.org/thefungi/aspergillus_spp.htm
Bacillus
Pseudomonads if wet:
http://www.hpa.org.uk/web/HPAweb&HPAwebStandard/HPAweb_C/1195733822642
glass

Equipment:
Biofilms
Pseudomonas aeruginosa

Personnel:
Microcci, Staphylococci
Yeasts, Fungi
enterobacteriaceae:
http://www.microbionet.com.au/enterobacteriaceae.htm

e.g.http://farmakopoioi.blogspot.com/2009/02/blog-post_9469.html

eye products: Ps.aeruginosa, Staph.aureus
non sterile oral products: E.coli, Staph.aureus, Clostridium sp., Ps.aeruginosa, Candida, fungi
non sterile topical products: Ps.aeruginosa, Klebsiella, Staph.aureus, Clostridium sp.