Africa has many fresh water sources such as Lake Tanganyika, Lake Victoria, the Zambezi, Nile, and Juba Rivers. Theoretically, Africans should be able to at least, adequately sustain healthy life with this amount of water (Whiteford & Whiteford, 2005). On the other hand, several issues affect the water sources making them either inaccessible, or dangerous to use. Diseases form and spread all through Africa, deteriorating life due to deficient amounts of clean water (Whiteford & Whiteford, 2005).

The reason for the water problems majorly involves dams and deforestation, along with pollution. Firstly, dams provide irrigation and hydropower, but hidden underneath these benefits are the massive and long-term detriments of destroying the well-known system of flood-plain agriculture and deforestation due to incomplete dam projects. Flood-plain agriculture is the classic system of agriculture that was mainly used along the Nile River as well as several other rivers in Africa. These traditional systems of agriculture depend on the annual floods in order to fertilize and water their crops. Water, as well as the silt that once functioned as fertilizer, are now built up behind the dams and are unusable. Secondly, deforestation dries up the land even more because interception and transpiration from trees stop, causing more forest fires and destruction of habitats. Deforested land becomes a dried up desert absolutely unusable by all habitats, especially humans (Jobin, 1999). Thirdly, pollution caused by poor sanitation techniques, in addition to industrial and chemical pollution are major reasons for the decline of life in Africa. Poor sanitation techniques lead to human and animal feces infest water, leading to increase in diseases related to water. The industrialization and urbanization in some parts of Africa leads to high levels of modern environmental health hazards. This results in other severe health problems indirectly related to water. For example, in the Nairobi River Basin in Kenya, there were effluent concentrations of elements such as nickel, copper, and lead, which were 60, 600, and 120 times higher than recommended (Nweke and Sanders, 2009). Another major cause of chemical pollution all across Africa is the use of pesticides in agriculture which have been detected in streams and rivers in different regions. These pesticides contaminate soil, water, air, and food sources, posing serious health threats to Africa’s populations. Endosulfans, as well as more dangerous organochlorines, such as DDE and DDT have recurrently been detected at water sources near agricultural areas in South Africa. This contamination has been confirmed to regularly exceed the “European drinking water standard of 0.1 g/L” (Nweke & Sanders, 2009). This contamination not only poisons potential sources of food, but it also destroys habitats which all have a chain reaction pertaining to the sustainability in Africa. In summary, these factors influence the water quantity and quality in Africa. It also negatively affects people’s habits regarding water usage. If people realize they have little water, they ration it ineffectively. For instance, they will take up water usage reducing habits such as not washing hands, clothes, food products, dishes, themselves, etc. leading to less hygiene and increasing the likelihood of getting disease. If there is plenty of water but it is contaminated, the pollutants in the water source will cause diseases. Therefore, due to poor water management in Africa, diseases related to water have been severely affected.

Water-related diseases differ from waterborne diseases in that the disease is not directly caused by the water consumed. Instead, the vector of the disease uses water as a breeding ground from which the vector then emerges. Common water-related diseases include malaria, yellow fever, schistosomiasis or bilharzia, and onchocerciasis or river blindness (Whiteford & Whiteford, 2005).

Schistosomiasis, also known as bilharzia, is a disease that is highly prevalent along the Nile River as well as all other fresh water resources throughout Africa caused by parasitic worms and snails (Jobin, 1999). The most common parasitic worms that cause bilharzia in humans are Schistosoma mansoni, D. haematobium, and S. japonicium (Centers for Disease Control and Prevention, 2010). Infection occurs when the larval stage of schistosomes search for a human host while swimming in the water. After parasitizing the human circulatory system by penetrating the skin of an individual in contaminated water, they reproduce in the human gut or bladder by laying their eggs there (Centers for Disease Control and Prevention, 2010; Jobin, 1999). These eggs pass out of the body by means of human waste and reach aquatic habitats of snails (Jobin, 1999). After the eggs hatch, they develop into larvae which penetrate the snail, developing further and “multiplying by astronomical factors” (Jobin, 1999, p. 66). The parasite larvae then leave the snail continuing the reproduction cycle. As written by Jobin (1999), “bilharzia is a debilitating disease which can cause early death of persons parasitized by large numbers of worms” (p. 68).

Symptoms of bilharzia include developing a rash or itchy skin within days of infection. Within 1-2 months of the infection, symptoms such as fever, chills, cough, and muscle aches may also appear, but people tend to have no symptoms at this early phase. The eggs that travel in the body can also cause inflammation and scarring. As reported by CDC (2010), infected children may “develop anemia, malnutrition, and learning difficulties.” All of these symptoms are reactions of the body to the eggs produced, and not by the worms themselves. Treating schistosomiasis is essentially effortless; you must take a pill 1-2 days (Centers for Disease Control and Prevention, 2010).

Since the health care systems in some African countries are shoddy, and the majority of these populations cannot afford treatment or drugs, prevention is the most efficient technique to fight disease throughout the continent (Falola & Heaton, 2007). Bilharzia can easily be prevented in Africa by avoiding swimming in fresh water sources, health education, drugs, focal application of biocides to kill snails, and improved water supply and sanitation are also required to stop the spread of the infection. Using feces and urine contaminated water is a major cause of spread of the disease due to the nature of the parasite’s reproductive system, but another equally important issue is intensifying agriculture. Increased agriculture results in runoff with high concentrations of nitrogen and phosphorous, which act as a fertilizer (Peace, 2006). These compounds trigger an increase in aquatic weeds, the ideal habitat for snails, which causes increased bilharzia transmission. In addition, since people wanted to clean the water sources from the weeds, they would manually try to clean the water supply, without taking any precautions. This exacerbated the situation by exposing themselves to the disease (Jobin, 1999).

An example of the relationship between agriculture along with irrigation, and bilharzia as well as malaria transmission can be seen in the Gezira-Managil Irrigation System in Sudan. In 1925, when the irrigation system was first constructed, the overall agricultural intensity increased by 300%, this was because the natural system had been altered with. Naturally, the water should have dried out by April-May, but instead it ran 100% of the time. The Gezira-Managil Irrigation system became the main source of income in Sudan, producing 3/4 of the gross national cotton production. By 1970, the proliferation of agricultural pests, aquatic weeds, snails, mosquitoes and silt in the canal lead to the decline of the agricultural system. As a result, cotton was infested by the white-fly, pathogenic viruses and bacteria multiplied in the water making it unusable. Malaria mosquito populations increased, attacking at night and increasing transmission of disease, since there were no longer dry seasons to destroy their habitat. Similarly, bilharzia snails increased since the unnatural, man-made system had constructed an exceptionally ideal habitat for them, attacking during the day as people waded in the waters, and intensified the transmission of the disease. People who worked on the fields and near the irrigation system got infected, not being able to work on the nearly non-existent cotton fields. The country’s gross income changed from approximately US $228 million to US $76 million by 1981. There was no longer any money, which meant no more facilities for community water supplies and sanitation, increasing disease and unemployment, resulting in even less money in a seemingly endless cycle (Jobin, 1999).

There are many factors that act as obstacles in the way of African well-being. The most prevalent type of disease in Africa is waterborne and water-related. Sheik-Mohamed & Velema (1999) report that “major causes of mortality and morbidity seem to be preventable infectious diseases.” Govender et al. (2011) similarly state that “diarrheal diseases are an important cause of morbidity and mortality in low- and middle-income countries” and that these diarrheal diseases can be prevented simply through improved water quality. Every 8 seconds a child dies from a disease related to having either unclean or not enough water. Diseases linked to water kill more 5 million people each year – ten times the amount of people killed in wars (Whiteford & Whiteford, 2005). These statistics are outrageous. Every human should have the right to have clean water. Every human should have the right to live in a healthy environment and be in good health.

References

• Centers for Disease Control and Prevention. (2010, November 2).
• Schistosomiasis: General Information. Retrieved October 2011, from Centers for Disease Control and Prevention: http://www.cdc.gov/parasites/schistosomiasis/gen_info/faqs.html
• Falola, T., & Heaton, M. M. (Eds.). (2007). HIV/AIDS, Illness, and African Well-Being. Rochester, NY: University of Rochester Press.
• Govender, T., Barnes, J. M., & Pieper, C. H. (2011). Contribution of water pollution from inadequate sanitation and housing quality to diarrheal disease in low-cost housing settlements of Cape Town, South Africa. American Journal of Public Health , 101 (7), e4-e9.
• Jobin, W. (1999). Dams and Disease. London, UK: E & FN Spon.
• Nweke, O. C., & Sanders, W. H. (2009). Modern environmental health hazards: a public health issue of increasing significance in Africa. Environmental Health Perspectives , 117 (6), 863-870.
• Sheik-Mohamed, A., & Velema, J. P. (1999). Where health care has no access: the nomadic population of sub-Saharan Africa. Tropical Medicine and International Health , 4 (10), 695-707.
• Whiteford, L., & Whiteford, S. (2005). Globalization, Water and Health. Santa Fe, New Mexico: School of American Reasearch Press.

Adam forgot, so did his children.

How does our brain store information? How is it possible to make learning faster and easier? Is there any way not to forget what we have learned and to remember things more easily? Of what importance is the fact that information is never deleted from our memory, even if we have forgotten it? These are among many of the questions for which answers have been sought over the years.

Memory is one of the functions of the brain and it is defined as the ability to preserve acquired information consciously and relate it to the past. It is not just a certain portion of the brain, but rather the entire organ that functions in storing, processing, and retrieving external and internal signals. Signals that build up our memory are what we usually perceive through our five senses. When we burn our hand, or see or experience a traffic accident , when we are given a compliment and many other events are all examples of external signals, whereas internal signals are related to our nervous system or imagination. The pain one feels during a heart attack, the anxiety of a cold sweat, or a beautiful daydream are all stored in our memory too. We may or may not remember them. There is no deletion; it is simply that we do not remember. Forgetting is a state that is encoded in our makeup with differing degrees, depending on the kind of life the person has experienced. Age, gender, stress, habits, and illnesses all have varying roles in forgetting.

Short-term memory

Short-term memory refers to saving and remembering what we have learned a few seconds or minutes ago; the prefrontal brain is the location for this temporary processing. Signals are kept in this portion of the brain for a few seconds and then conveyed to the back stage (as in the transfer of data from the cache memory to the main memory in computers). We tend to quickly forget those things on which we have not spent a long time or to which we have not assigned great importance, even though we can understand them. Imagine how unbearable our life would be if we were to store in our memories and remember things in infinite detail like the color of the wall we are facing, the variety of the objects around us and their qualities, the air we breathe in and out, or every beat of our heart. The signals that come to our brain within a certain time frame are filtered according to our needs and their significance and limitations are applied depending on their qualities and quantities.

There is no consolidation processing for short term memory. Second or minutes after signals are received they are retrieved in accordance with what we need; if they are insignificant for us, they are forgotten in the same amount of time. The information that is significant for the person is consolidated in the hippocampus and reserved in mid and long-term memory units.

Mid and long term memory

After being processed in the sub-cortex (limbic system) of the brain, signals are saved. Depending on their level of urgency, the meaning they stand for, and their emotional effect, signals are saved in either the mid or long term memory. Pain, joy, pleasure, and fear are states that solidify memory traces. A heart attack, the infliction of wounds and bruises or humiliation, accidents, visits from a loved one-these are all examples of events that are easily remembered. However, a lasting record is almost impossible to attain if the subject is something that has been forced (like a student studying for higher marks) or if the subject does not appeal at all. Consolidation is necessary to make a short term memory a lasting one. However, if a student is curious about the subject and enjoys what he or she is learning, then long term memory is possible without too much effort in consolidation. Forced consolidation (e.g. a student’s orientation to attain higher marks) requires a longer period. The information is consolidated more easily when a person is in a sound and alert state of mind.

Storage in the long-term memory does not occur immediately after something has been learned or experienced. For this storage to be possible at least an hour needs to pass to synthesize the memory proteins that are responsible for recording. If electric shock is applied to a person’s brain immediately after an unforgettable event, they will not be able to remember the event. But if the electric shock is applied an hour later, the memory remains.

Once stored in long-term memory, information can be retrieved, even after months or years. When new information is obtained older information is called up and they are saved with a new pattern of storage, with the newcomers being related with the ones that have already been stored; it is in this way that long term memory is generated.

It has been argued that RNA has a role in storing old information. In experiments, guinea pigs were taught information through repeated practice which is stored in their long term memory. The brains of these animals were later minced up and fed to other animals. It was observed that those animals which had been fed the brains learned faster and more easily than other animals that had been fed on a diet that did not include the brains. This shows us that information encoded in the memory is not lost; rather it is transferred with the help of certain molecules. It is also known that DNA is related to genetic memory.

It has been found that people with good memories have a greater number of nerve cells and channels of transfer in the memory-related zones of their brains (cortex, corpus callosum, hippocampus, thalamus, hypothalamus, limbic system, amygdale, temporal lobe, and prefrontal cortex), while there are less cells in other zones of the brain. Nerve cells are stimulated while signals are stored in one’s memory. Even if a person has a weak memory, activities like reading, memorization, or other engagements that improve love, happiness, and peace of mind may help long-term memory.

Forgetfulness

It is important to find out whether forgetfulness occurs because of an illness or something else. Age is one major factor. Forgetfulness in an aging person is proportionate to the number of the loss of cells.

Stress, dealing with multiple things all at once, or occupying oneself with things that are of no benefit, that is, creating a pollution of information, all affect short term memory and may cause forgetfulness.

Forgetfulness due to damage or illness

If the nerve cells of the lower occipital lobe of the brain are damaged, old information cannot be retrieved. Likewise, in case of damage to the nerve cells that are found in the temporal lobes on the sides of the brain, or due to an insufficient intake of B3 and B12 vitamins, cerebral hemorrhage or an embolism in the veins of the memory zones forgetfulness may occur.

Patients with Alzheimer indicate short term memory loss. They tend to forget visitors’ names, daily events, or the doctor’s advice.

Chronic alcohol abuse may cause damage in the hippocampus and thus in the ability to encode information.

Electroshock may also delete recent information that has been recorded in the short-term memory. Thyroid failure, Parkinson’s, hydrocephaly, schizophrenia, brain tumors, and epilepsy may also cause forgetfulness.

Some advice

Spiritual teachings and religious services have many positive aspects in our lives in addition to being our duties for expressing our servanthood to God Almighty. In Islam, for instance, principles like “enjoining good and forbidding evil,” praying at night, a brief afternoon nap, staying away from what is forbidden, reading and/or memorizing the Qur’an, and other activities may provide some protection against forgetfulness.

It is also claimed that keeping oneself busy with things that are considered morally improper, not least things that are sexually provocative in an illegitimate way, may damage neurons that are operative in memory. In order to be less affected by forgetfulness in our advanced years, it can be helpful to read spiritually and intellectually useful material, to learn and memorize new words and concepts, to keep oneself in good moral condition by engaging in charity work and helping others, and to maintain good sleep and a healthy diet

On the other hand, thinking a bit more wisely, to be able to forget (not forgetfulness) also has many benefits. Our nervous system is relaxed by forgetting, otherwise it might collapse. Forgetting old informa¬tion could well open up room for new information, although this does not mean that the information is deleted from memory; it is retrieved when needed. But, if forgetting reaches a level that is above medically ex¬pected averages, then medical help should be sought.

There are incidents of patients who are suffering from dementia and Alzheimer regaining their memory after electroshock therapy. Perhaps this is evidence that we will remember and testify for all our actions when we will have to account for them.