Page 133 - Journal of Special Operations Medicine - Fall 2017
P. 133

Other problematic findings surrounding the outbreak included   coverage. PM teams inspect and evaluate local storage, prepa-
              a lack of traceability in the food supply chain, both retroac-  ration, and serving areas, as well as any wastes or leftovers.
              tively (track-back capability) and prospectively (trace-forward   Effectively, the DoD implements a system of checks similar to
              capability). It took more than 8 days of comparing shipping   those of the U.S. Food and Drug Administration and the U.S.
              manifests, examining supplier records, and looking at finan-  Department of Agriculture. Food-related illnesses and out-
              cial transactions to determine the route the contaminated   breaks are now much rarer occurrences at DoD dining facili-
              foodstuffs took to reach Baghdad. Once the spinach, arugula,   ties than in the past. In a forward setting, food stuffs are often
              mint, and parsley were identified as culprits (the potato salad   sourced internationally from different countries and procured
              was made with contaminated parsley), only the fact that all   locally; yet, they are still held to the stringent DoD system of
              those were grown only on one farm in Turkey allowed the   scrutiny. Other nations, however, may be less stringent or use
              warehouse to purge its stocks from contaminated suppliers.   less scrutiny than the U.S. DoD.
              Had the warehouse used multiple sources of those particular
              foodstuffs, the warehouse would have had to purge its entire   Conclusion
              stock of those foods. The warehouse would have been unable
              to differentiate different shipments as well.      A foodborne gastroenteritis outbreak occurred on a diplo-
                                                                 matic compound in Baghdad, Iraq, from 30 September to
              All food supply chain nodes should maintain a system to iden-  12 October 2016. Phylogenetic analysis to compare clinical
              tify sources and recipients of each item. For each step in the   strains was impossible owing to technical limitations and con-
              supply chain, food shipments should include the immediate   straints. A preponderance of evidence, however, implicated the
              past source of the commodity, lot identification, quantity,   most probable etiological agent as E. coli. Produce and salad
              packing date, receipt date, identity of the carrier, and recipient   items from the dining facility served as the vehicles of trans-
              of shipment. The investigators were unable to determine the   mission. Spinach and potato salad made from contaminated
              number of lots contaminated because the warehouse did not   ingredients served in the only communal dining area were in-
              break up lots. Of note, because the warehouse service had not   criminated at the source of production. All time, temperature,
              identified or numbered separate lots of produce, investigators   preparation, and hygienic procedures for storage, preparation,
              had to purge all the lots.                         and serving had been followed. The outbreak had not been
                                                                 exacerbated by living conditions or hygienic practices of the
              Other points to consider include that when using high-risk food   affected population.
              sources, it is recommended to either exclude the foods entirely
              from consumption or to cook the foods thoroughly. There is   References
              a case for seasonally excluding produce based on risk profile.     1.  World Health Organization and Food and Agriculture Organi-
              For instance, produce contamination spikes during the spring   zation of the United Nations. Codex Alimentarius: international
              and fall seasons when soil is historically disrupted for tilling or   food  standards.  http://www.fao.org/fao-who-codexalimentarius
                                                                    /en/. Accessed 16 August 2017.
              fertilization. Another factor is that highly vascular plants are     2.  Department of the Army. Tri-service food code. http://www.med.
              able to recover viable cells from inner tissues; therefore, E. coli   navy.mil/directives/Pub/5010-1.pdf. Accessed 16 August 2017.
              can migrate to internal plant tissue, where it is inaccessible to     3.  Departments of the Army and U.S. Marine Corps. Department of
              sanitizing agents.  For example, studies on lettuce have dem-  Defense Veterinary/Medical Laboratory Food Safety and Quality
                           4–7
              onstrated that E. coli O157:H7 can enter the plant’s root sys-  Assurance Program. file:///C:/Users/JBH/Downloads/ADA403242
              tem and migrate to the edible part of the leaves in an effective   .pdf. Accessed 16 August 2017.
              dose. 4–7  The referenced studies provide an explanation on how     4.  Solomon  EB,  Yaron  S,  Matthews  KR.  Transmission  of  Esch-
                                                                    erichia coli O157:H7 from contaminated manure and irrigation
              multiple 200-ppm washes of FFVs can be ineffective against   water to lettuce plant tissue and its subsequent internalization.
              microbial  contaminations.  Manure fertilizer, sewage  water,   Appl Environ Microbiol. 2002;68(1):397–400.
              and bioaerosols from nearby farms have all been implicated in     5.  Seo KH, Frank JF. Attachment of Escherichia coli O157:H7 to
              past foodborne illness outbreaks. 8–10  The results of the studies   lettuce leaf surface and bacterial viability in response to chlorine
              also add to the evidence for using only credibly audited food   treatment as demonstrated by using confocal scanning laser mi-
              sources. A credible auditor would catch environmental issues   croscopy. J Food Prot. 1999;62:3–9.
              from around the farm. In countries outside the purview of U.S.     6.  Beuchat LR. Survival of enterohemorrhagic Escherichia coli
                                                                    O157:H7 in bovine feces applied to lettuce and the effectiveness
              regulatory agencies, DLA serves as a credible agency where lo-  of chlorinated water as a disinfectant.  J Food Prot. 1999;62:
              cal governments are not always reliable.              845–849.
                                                                   7.  Beuchat LR, Nail BV, Adler BB, et al. Efficacy of spray applica-
              Robust local national agency controls or U.S. Army veterinar-  tion of chlorinated water in killing pathogenic bacteria on raw
              ian inspection of farms for food safety should also be consid-  apples, tomatoes, and lettuce. J Food Prot. 1998;61:1305–1311.
              ered as strategies to improve food supplies. The DoS lacks the     8.  Jahne MA, Rogers SW, Holsen TM, et al. Bioaerosol deposition
                                                                    to food crops near manure application. J Environ Qual. 2016;42:
              preventive medicine (PM) and veterinary inspections services   666–674.
              found in the DoD. Military PM and veterinary teams use risk-    9.  Zhang Q, Shi GQ, Tang GP, et al. A foodborne outbreak of
              based facility and sanitation inspections and survey audits. Vet-  Aeromonas hydrophila in a college, Xingy City, Guizhou, China.
              erinarians audit all agencies wishing to sell food stuffs though   Western Pac Surveill Response J. 201219:3(4):39-43
              the DLA to the DoD. The DLA and DoD procedures exercise   10.  Guillois Y, Abravanel F, Miura T, et al. High proportion of asymp-
              controls on food shipments from origin to storage and from   tomatic infections in an outbreak of hepatitis E associated with
                                                                    a  split-roast  piglet,  France,  2013.  Clin  Infect  Dis.  2013;62(3):
              distribution and to receipt, also known as “ farm-to-table”   351–357.






                                                                         Investigation of Gastrointestinal Illness Outbreak  |  129
   128   129   130   131   132   133   134   135   136   137   138