In class, this semester we have taken a look into health factors, and disease agents that cause infections and diseases throughout societies worldwide, and the ways that they affected societies. We’ve looked at factors such as the globalization, to diseases such as the plague, syphilis, small pox, TB, cholera, sexually transmitted diseases, to emerging zoonotic diseases, to diseases such as P. infestans that caused the Irish Potato famine and how these diseases effected society at the time. Often times the public blamed immigrants, or certain social groups/classes for these diseases even at times when the germ theory had become accepted by scientists.
The first public health issue concern we examined in Artifact 1 was the health issues caused by a globalized world. Connected populations of humans at the dawn of civilization changed the way diseases where spread, grew and mutated. When humans lived as hunter gatherers fewer diseases existed. Those that did typically would infect a few individuals and then fail to infect a larger population. When humans began to live in fixed settlements, diseases where able to infect far more individuals and then had the ability to spread across trade routes. Diseases such as the black death, and syphilis where able to spread with travelers to new lands and cause far and wide-reaching devastation. In “The Price of Being Sedentary” I wrote about how the first plagues spread across Asia to Europe. Later I wrote about how syphylis was contracted by the Spanish and made its way back to Europe. This has a greater impact on human health than ever. Over 70% of diseases that affect humans today are zoonotic in origin. As human settlements encroach farther into jungles and wild habitats we will see more emerging zoonotic diseases.
The black death, Y. pestis, was the first epidemic level disease we looked at this semester. The disease was said to have killed off up to a quarter of the world’s population at the time. Y. pestis actually has spread to epidemic levels three times in human history. The first time during the roman empire it was known as the Plague of Justinian. Later in the Middle Ages in its most famous pandemic Y. pestis ravaged much of Asia and medieval Europe. Up to a quarter of the population died in this pandemic. Medieval European societies became more pessimistic and morbid as observed in their artwork depicting the grim reaper, and people made of skeletons instead of flesh. Most recently, the plague was able to spread through modern trade and shipping lanes and killed 12 million people. The disease is carried by fleas on rats, but can also be spread in the air if an individual’s lungs are infected. Today the black plague still exists and is actually endemic to the southwest of the U.S.
Syphilis was an endemic disease to the America’s that was brought to Europe by the Columbian exchange. The disease would actually end up killing the famous, or infamous if your and American Indian, explorer Christopher Columbus. Our focus on this disease turned to the ethics of modern medical testing. In our 3rd artifact we looked at the men of the Tuskegee Syphilis experiment and how their suffering has effected public trust of medicine in the American South even today. As I wrote about in “Volunteers for Syphilis?” the men of the Tuskegee experiments where misled and even lied to about their treatments. Many of the 400 men would go on to die because of their syphilis infection, and those who attempted to receive outside treatment where stopped from doin so.
Next, we turned out attention to how Small Pox shaped the world. When the conquistadors arrived in South America the natives had no immunity to the disease. When the Spanish first attacked the Aztecs, a highly militarized civilization, they were initially beaten. Many months later when the Spanish had regrouped and made a second attack they found the capital to appear disserted. The Aztec population had been decimated by the disease. It is estimated that as Small Pox spread throughout South and North America 90% of the population died. The massive loss of life due to this disease would allow European nations to colonize the new world. This disease was also one of the first times biological warfare was used. The British are recorded to have traded small pox infected blankets with Natives to kill them without having to engage them in battle.
Tuberculosis (TB) is known as the third world terror. This is a bacterial infection spread through the air that causes weight loss, coughing, and fever. Throughout the 19th and 20th centuries this disease ravaged western cities. Known as the poor man’s disease, the confined living spaces of slums allowed the bacteria to spread rapidly throughout populations. In “The Third World Terror, TB” I wrote about how immigrants and the poor where disproportionately affected by the disease so the upper classes began to associate the disease with poverty. As we examined in our 5th artifact we learned that patients recovering from TB have to take a stringent series of medicine for 6-12 months to prevent the strain they carry from mutating into a drug resistant strain. Since the disease causes the infected to become listless and lethargic it also was associated with laziness among the poor, and the immigrants. Today TB still exists and is estimated to live dormant in up to a quarter of the world’s population. It affects those who suffer from malnutrition or have inhibited immune function like those who suffer from HIV/AIDS.
The Irish Potato Famine was caused by the fungus P. infestans HERB-1. The fungus decimated potato crops throughout Europe. The Irish at the time were forced to trade all exports with Great Britain. When there staple crop, the potato was depleted by the infestation for the better part of a decade over 1 million Irish died to starvation, and diseases associated with poverty and malnutrition. The Irish still blame the British for the toll in lives that this fungus took. Today genetic engineering is looking to solution to develop strengthened immune responses for crops to defeat plights and pests.
Next, we turned our attention to Cholera. This disease results from populations drinking contaminated water. The bacteria responsible for causing cholera lives in water and excrement. When drinking water is contaminated with this bacteria those who consume it suffer from severe dehydration as their body expels all fluids. In “Cholera the Classless Killer” I wrote about how modern cities have advanced water treatment, and sewage systems designed to keep cities clean, and provide their inhabitants with clean drinking water to prevent modern outbreaks of cholera.
Today the world suffers from a sexually transmitted epidemic, HIV/AIDS. The disease causes immunodeficiency in individuals and can lay dormant for decades. Many who have contracted the disease have no idea that they have become infected and are at risk of passing the disease on to others. The disease does not normally lead to death, instead it suppresses the immune system so that other infections that would not normally be fatal kill the patient. Modern health organizations work to distribute information about HIV and help spread knowledge about the disease to prevent the disease from being spread further.
Artifact 1 “The Price of Being Sedentary”
Artifact 3 “Volunteers For Syphilis”
Artifact 5 “The Third World Terror, TB”
Artifact 7 “Cholera The Classless Killer”

