PU535 Unit 9 Prevention Point Analysis Example

The Soil Stays, So the Program Works Downstream of It: A Unit 9 Prevention Point Analysis Mapping Neonatal Tetanus From Spores in the Ground to a Newborn's Spasm and Judging Which Step Each Intervention Actually Breaks

[Student Name]

Purdue University Global

PU535: Public Health Biology - A Global Perspective

Unit 9 Prevention Point Analysis

[Instructor Name]

[Date]

The district, its birth numbers and its coverage figures are composite; the pathway, the prevention evidence and the research cited are real.

A Reservoir No Program Will Remove

The organism that causes tetanus lives as a spore in soil, dust and animal waste almost everywhere, and in the composite district's farmland it is ordinary. Spores survive drying, sunlight and years of waiting. No sanitation program, no disinfectant and no campaign will clear them from the ground a village stands on. This matters because it removes the first step from the list of prevention points: there is no reservoir control in tetanus, unlike in cholera or in a water-borne infection, and an analysis that proposes environmental clean-up has misread the pathway. Every usable prevention point lies between the spore and the newborn.

Seven Steps From Soil to Spasm

1. Spores are present in soil, dust and animal waste throughout the district.

2. Spores are carried onto hands, cloths, blades and birth surfaces.

3. Spores enter the newborn through the cut umbilical stump, or through the stump during the days it remains open.

4. In the low-oxygen tissue of the stump, spores become active bacteria.

5. The bacteria produce a toxin at the site; the organism itself does not spread through the body.

6. The toxin travels along nerves to the spinal cord and brainstem, where it blocks the signals that relax muscles.

7. Between three and fourteen days after birth, the infant stops feeding, then stiffens and spasms; untreated, most die.

Each step below is examined as a candidate prevention point, in the order a child meets it.

Prevention Point One: Antibody the Infant Is Born With

The strongest point in the pathway is not on the pathway at all. A mother immunized with tetanus toxoid makes antibody that crosses the placenta, so the infant is protected in the week when exposure happens, before any immunization of its own is possible. This acts on step six, by neutralizing toxin as it is produced, and it acts regardless of how clean the birth was. Two doses in pregnancy, or a documented history of prior doses, give protection in the large majority of infants, and the Cochrane review of trials in the field found large reductions in neonatal tetanus deaths (Demicheli et al., 2015). The historical evidence is as strong: the global decline in neonatal tetanus deaths over the past three decades is attributed mainly to maternal immunization coverage rather than to changes in delivery practice (Blencowe et al., 2010).

Prevention Point Two: The Birth Surface, the Blade and the Hands

This point acts on step two, reducing how many spores reach the stump. In the composite district, 41 percent of births happen at home, many attended by family members, and the instrument used to cut the cord is whatever is at hand. A sterile blade, clean hands and a clean surface lower the dose of spores substantially but not to zero, since the stump stays open for days afterward in a house with an earth floor. The point is real and worth acting on, and it is also the point most often overstated, because a birth attended with sterile equipment in a dusty room still leaves a wound exposed to the same environment for a week.

Prevention Point Three: What Is Put on the Stump

This acts on step three, over the days that follow. In parts of the district, custom places ash, mud or oil on the stump, materials that carry spores directly to the one place they can germinate. Changing that practice is cheap and requires no supplies, which makes it attractive, but it depends on persuading households rather than delivering a product, and advice given once at a clinic visit rarely survives contact with a grandmother's experience. The analysis therefore recommends it as an addition to immunization, not as a substitute, and recommends that the message be carried by the traditional birth attendants themselves. This is the only point in the pathway where prevention costs nothing and is still the hardest to deliver.

Prevention Point Four: Treatment After Onset

By step seven the toxin is already bound to nerve endings, and treatment cannot undo that; it can only support breathing and control spasms until nerve function recovers over weeks. Case fatality in a district hospital without mechanical ventilation remains high, and the care required for one infant will occupy staff for a month (Thwaites et al., 2015). Treatment is therefore not a prevention point at all, and including it in a prevention plan, as the district's current plan does, both overstates what the hospital can do and competes for money with the three points above it.

Why the District Does Not Know Its Own Case Count

A prevention analysis depends on knowing how many cases there are, and in this district nobody does. Neonatal tetanus kills at home, in the first fortnight, in families who may not register the birth, and a death at four days old is often recorded as a death from feeding difficulty or from no cause at all. Published assessments of this disease put reported cases at a small fraction of the true number, which is why global estimates rest on survey and model rather than on notification (Roper et al., 2007). Two practical consequences follow. The district should treat its five notified cases last year as a floor rather than a count, and it should ask its birth attendants a single retrospective question at each monthly meeting, whether any infant they delivered stopped suckling and stiffened in the first two weeks, because that question will find more than the register does.

Survival Does Not Confer Immunity

One further point belongs here because it is commonly missed. The quantity of toxin that causes tetanus is far too small to provoke an immune response, so a child who survives the disease is no more protected than before. Survivors need the full immunization series like anyone else, and a district register that marks them as immune by experience is wrong in a way that will produce second cases.

Ranking the Points for This District

1. Raise two-dose maternal immunization coverage from the district's current 63 percent, using the antenatal visits already attended, and record doses in a card the woman keeps. This is first because it works through step six regardless of the birth.

2. Supply clean delivery kits through the traditional birth attendants who cover the home births, with the stump message delivered by the same people.

3. Fund case management last, and honestly, as care for the cases the first two points will not prevent this year.

The ordering follows the pathway analysis rather than cost. Mortality from tetanus fell substantially worldwide between 1990 and 2015, and the countries that achieved it did so in this order (Kyu et al., 2017). The district's own plan reverses it, which is the single recommendation this analysis asks the program to change.

References

Blencowe, H., Lawn, J., Vandelaer, J., Roper, M., & Cousens, S. (2010). Tetanus toxoid immunization to reduce mortality from neonatal tetanus. International Journal of Epidemiology, 39(Suppl 1), i102-i109. https://doi.org/10.1093/ije/dyq027

Demicheli, V., Barale, A., & Rivetti, A. (2015). Vaccines for women for preventing neonatal tetanus. Cochrane Database of Systematic Reviews, 7, CD002959. https://doi.org/10.1002/14651858.CD002959.pub4

Kyu, H. H., Mumford, J. E., Stanaway, J. D., Barber, R. M., Hancock, J. R., Vos, T., Murray, C. J. L., & Naghavi, M. (2017). Mortality from tetanus between 1990 and 2015: Findings from the global burden of disease study 2015. BMC Public Health, 17, 179. https://doi.org/10.1186/s12889-017-4111-4

Roper, M. H., Vandelaer, J. H., & Gasse, F. L. (2007). Maternal and neonatal tetanus. The Lancet, 370(9603), 1947-1959. https://doi.org/10.1016/S0140-6736(07)61261-6

Thwaites, C. L., Beeching, N. J., & Newton, C. R. (2015). Maternal and neonatal tetanus. The Lancet, 385(9965), 362-370. https://doi.org/10.1016/S0140-6736(14)60236-1