If you heard that a very destructive creature was in your village, what would you expect this creature to look like? Perhaps a ferocious cat, or a colossal beast that was capable of leveling whole buildings? Such a creature does exist in Africa, except it is a single celled bacterium by the genus Trypanosome, a microscopic creature with the capacity to strike fear into the heart of virtually an entire continent. Living a segment of its life as a parasite in the bloodstream of humans and other mammals, Trypanosome can trigger a lethal neurological disorder in the circulatory system. It has also been found that it is the cause of a serious sleep disorder in humans. The disease can ruin a person’s circadian cycle, cause fevers, and changes in personality. Unfortunately, about 60 million people in 36 of the 52 countries in Africa are at constant risk.

Another significant role in the lifecycle of trypanosomiasis is the tsetse fly, the bacteria’s most common intermediate host, which transports the Trypanosome from one mammalian host to another. Trypanosomiasis is endemic in a large area of approximately 3.8 million sq. mi. in Africa, where both the parasitic disease and the tsetse fly coexist. Moreover, the danger is not limited to humans because it also affects many other mammal species, most notably livestock and horses. Malnutrition often follows as a direct consequence when large swaths of animals are killed by trypanosomiasis, as there will be less meat and dairy to consume.

The trypanosome parasite invites disease for the host mammal by collapsing or neutralizing its immune system. Let us first remember how the immune system works:

The immune system

Every living thing is provided with two things: food and protective systems. Immune system is one of these vital systems. Most immune systems across mammals function in similar ways; Antibodies are produced to destroy toxic substances and antigens on foreign bacteria, fungal cells, or the virus sheath invading the body. These antigens can be found on the infected foreign cells and have a unique shape and structure according to the organism that causes each disease. The immune system binds to the antigens of the foreign organism in the same manner as a key-lock system with its antibodies produced while fighting against the disease, thus neutralizes the invading organism.

Most of the antigens, which reveal the identity of a foreign being, are structures created of proteins, polysaccharides, or protein-based fats. Our immune system has the sensitivity and the capacity to produce an infinitely diverse variety that can discern even quite identical but foreign substances bearing antigenic properties for our body. To draw an analogy, a specific antibody can be produced for each speck of dust on Jupiter. Our immune system is blessed with the ability to synthesize appropriate antibodies by selecting proteins that differ in type or location of one amino acid.

The mechanism of binding of the antibody to the antigen is carried out with effective economy, because each type of antibody is produced specifically against a particular antigen. This mechanism works like a key-lock system, so the body recognizes its own cells and does not attack them. Each antibody produced in the immune system is created in a three-dimensional, one-to-one compatible structure with the antigen that causes it to be produced, and easily recognizes and locates it, binds as the key fits into the lock, and thus renders it harmless by disrupting the chemical structure of the antigen.

Trypanosome and the immune system

The case of trypanosome vs. the immune system is somewhat exceptional. The abovementioned almost universal immunity principle does not work against trypanosome. Even though parasites are constantly exposed to the mammalian immune system in the blood, they constantly change the antigen that forms the surface sheath. They thwart the host’s defense, as if rapidly changing their password so that it can never be guessed. Until the immune system produces new antibodies to bind to new antigens, some of the trypanosomes discard their sheaths and drape themselves in another one. If this condition persists, the immune system of the host cannot cope with the infection and may succumb to it.

This extraordinary phenomenon astonishes the scientific community and many scientists are investigating the molecular structure of antigen diversity extensively in African, European, and US laboratories. These parasites are only 0.015–0.030 mm in size, and its two most notorious species are Trypanosoma rhodesiense and Trypanosoma gambiense, which inflict serious damage on the human body.

Like many other parasitic species, the life cycle of trypanosomes is very complex. In each phase of this life journey, the parasite takes different forms and exhibits different characteristics in such an unusual way that generates curiosity. The life cycle can be summarized as follows: when the tsetse fly bites a disease-bearing mammal, the trypanosomes in the mammal’s blood are sucked up and settle in the middle intestine of the fly. They undergo a series of complex processes including several structural and biochemical changes. After about three weeks, the trypanosomes appear in the fly’s salivary glands in a disease-bearing form. Meanwhile, they are also draped in new surface sheaths.

When the secondary host fly bites a healthy person, the disease-causing trypanosomes enter the blood of the new host. In this new stopover, parasites are transformed into a form in which they can rapidly multiply. First, they wreak havoc in blood vessels and on lymph nodes, causing fever, marks and swelling in the body. At this stage, a constant struggle with the host’s immune system ensues. A likely invasion the patient’s central nervous system by the trypanosomes can cause intense drowsiness, coma, and eventually death.

In years of research on the trypanosomes, the thick surface sheath covering the cell membrane of the parasite was first described in 1965 by Keith Vickerman of the University of Glasgow. Shortly thereafter, different surface sheaths were discovered in different trypanosome clones. In 1968, Richard W. F. Page from the Molteno Parasitic Research Institute in Cambridge analyzed and decoded the isolated antigenic surface proteins from several clones, revealing that each clone had a biochemically different protein. The clarity of these differences suggests that each antigen is expressed by a different gene. In the 1970s, George Cross and his colleagues found evidence supporting Le Page’s proposal. These antigens are now called Variable Surface Glycoproteins (VSG). As a result of subsequent research, the picture became even more clear.

Once the infection has begun, antibodies are formed in the host’s immune system that bind to the variable surface glycoproteins that appear on the surface sheath of the invading parasites. These antibodies kill most of the initial trypanosomes. Yet interestingly, on a few remaining trypanosomes a new sheath to which antibodies cannot bind is built, and the trypanosomes evade the immune system’s grasp. The survivors induce a new population producing new variable surface glycoproteins. This time, the immune system produces new antibodies against these freshly constructed antigens. Meanwhile, the parasitic population grows. Newly produced antibodies are able to kill 99% of new parasites again. However, until that time, the parasitic group constituted by about 1% of the survivors has already changed its sheath. Hence, another population begins to multiply. This process of life being a struggle unfortunately continues until the host mammal dies.

The mechanisms of antigen diversity in trypanosomes are very complex and variable, and the total capacity to produce varieties is not clearly known. Recombinant DNA technology is used to investigate the structure of the genes for producing variable surface glycoproteins, the mechanism of cell membrane binding, and the selection and expression of one of the codes. In addition to the four licensed medicines produced for the treatment of parasitic diseases, new drugs are being developed.

It is astonishing that this tiny window of invisible dimensions has such a huge potential opening to different branches of science. Many such exceptional and precise situations exist in the universe that may showcase contradicting mechanisms with general principles and procedures. Sometimes we may wonder why God creates such harmful parasites. Since we do not know the performance at every point of an entire ecosystem with our insufficient scientific knowledge, limited sensory organs and temporary observation, we tend to see any seemingly harmful being as futile and devoid of wisdom and immediately raise our voices in protest. However, with new discoveries in science, thousands of wise meanings may be extracted from a creature we generally take for granted.

References

Lori Peacock, Simon Cook, Vanessa Ferris, Mick Bailey, Wendy Gibson (2012): The life cycle of Trypanosoma (Nannomonas) congolense in the tsetse fly, Parasites & Vectors, 5:109 www.parasitesandvectors.com/content/5/1/109.

Michael P Barrett, Richard J S Burchmore, August Stich, Julio O Lazzari, Alberto Carlos Frasch, Juan José Cazzulo, Sanjeev Krishna, (2003): The Trypanosomiases, The Lancet, Vol 362, November 1, Pages 1469-1475, www.thelancet.com.

www.cdc.gov/dpdx/trypanosomiasisafrican/index.html

We live in a magnificent world inhabited by approximately 8,700,000 species. This number includes only general species, not subspecies. Scientists discover around 2,500 new species every year, and the number is soon estimated to reach 10 million.

All living organisms are blessed with unique bodies, systems, and organs, defense and protection mechanisms to survive and protect themselves, and special features to help them forage for food.

When people get ill due to environmental effects or malnutrition they usually consult a doctor. They try to find a cure by using the medicine prescribed by doctors. However, animals living in the wild don’t have this option. When animals living in nature or on the street get ill what can they do if nobody takes them to a vet? How do millions of species get well and find cures for their ailments?

You might think that animals who become sick in the wild must simply live with their symptoms, but this is not the case. In fact, we have given a clue at the introduction: each organism is equipped with features to lead a self-sustaining life. Either their bodily functions perfectly enable them to live in their habitat or their unique metabolisms protect them from harmful external factors. Animals also can use some plants whose health benefits have only recently been discovered by humans.

In recent decades, there has been a growing interest for herbal products such as walnut leaf, cherry stalk tangerine rind, grenadine red, and celery root to find cure for diseases.

Animals perform amazing tasks with mind-blowing adroitness as if each were an expert chemist. Wondrous mechanisms are activated when a need arises to protect animals from harm.

Some plants with healing properties:

Lupine, quassia, bitter wood, hemlock, fishberry, roselle, henbane, giant fennel root, pistachio, resin, pine turpentine, mistletoe, cumin, hibiscus, hibiscus flower, alkanet, flos elaeagni, camphor, cardamom, St John’s wort, French lavender, Flaxseed, linseed oil, henna tree, quillaia, wall germander, cranberry, aspand, daffodil, water lily, common balm and eucalyptus.

Animals have been consuming and finding cures in these plants since the dawn of time. They are also equipped with many surviving capabilities under extremely severe conditions. Here are a few examples:

Antibiotics expert

With a height of up to five meters, the giraffe is the tallest land animal. Scientists who investigated the scent emitted by the giraffe found 11 separate chemical substances in its fur. The chemicals turned out to have antibiotic properties, having an increased efficiency when combined. Only after a series of experiments can these incredibly complex chemicals be extracted in the laboratory. The giraffe has been using these chemicals to prevent fungi and bacteria, repel ticks, and stop the growth of germs. Where did these tall creatures study chemistry to know how to produce antibiotics such as indole?

The stubborn doctor

The bezoar ibex is a type of mountain goat native to Turkey, Iran, Turkmenistan and Pakistan. It has a motley coat of black, brown, grey, reddish-gold, and white. Both the male and female have horns and a goatee. The name means “cure” in Persian, and the locals must have noticed its habit of eating spurge whenever bitten by a snake. Scientists have identified the substance called euphorbone in the spurge plant. Amazingly, an analysis of this substance reveals that certain chemical reactions triggered by euphorbone neutralize the effects of venom. The poisoned creature looks for splurge from among the vegetation, self-medicates, and treats itself free of charge. It sure is no wonder when one realizes that the goat, the snake, and the plant are all created by the same hand.

The master of diving

Divers who ascend too quickly to the surface run the high risk of experiencing the bends, an intense pain that is likely to kill because of the gasses coming out of the bloodstream. But how do billions of creatures that lack oxygen tubes lead their entire lives in the sea without experiencing the bends?

Dolphins and whales, for example, descend to depths humans can’t reach on their own and then rise like it is no big deal. Human lungs cannot endure the pressure under such depths, but the bronchi and air sacs in the lungs of dolphins, however, are placed inside a protective cover of special cartilage. To avoid suffering the bends, dolphins release all the air in their lungs before diving deep. But how then do they breathe? The answer is hidden in their muscles, or rather in the myoglobin protein that is available in much higher amounts than in humans. These proteins have the ability to hold in high amounts of oxygen molecules. The much needed oxygen is provided from this source, enabling dolphins and whales to dive as deep as possible.

Poison for one, food for another

The macaw is an inhabitant of American tropical regions with an average wing span of 80 cm. It is known to be a tough creature that lives as long as 60 years. The macaw feeds on plants that produce a chemical called strychnine (C₂₁H₂₂N₂O₂), a powerful poison intended to ward off enemies. How can a substance that kills some living things nourish others? Immediately after eating the nutritious but poisonous seeds, the macaw flies to the rocky cliffs in a certain area. When they get there, they gnaw at and swallow some clay-based rock pieces. The fact that the bird ingests clay without any apparent reason is quite an interesting behavior. The reason was revealed only after research into the origins of the behavior. It turns out that the rocks that have clay in them include a substance called kaolinite (Al₂O₃.2SiO₂.2H₂O) that can absorb the poison in the seeds. The macaw can digest the normally poisonous seeds thanks to this absorption and live on with its life safely. There is no way the macaw can know about the substances present in the clay, so how does it know to eat the clay that can eliminate toxins?

The antifreeze expert

The arctic beetle survives against the inhospitable cold of the arctic thanks to a type of alcohol produced in its body that works as antifreeze. The glycerol (C₃H₈O₃), also called glycerin, produced by the insect prevents the blood and other fluid molecules from freezing and thus ice crystals from killing the cells and destroying cellular bonds. Furthermore, the shorter the days and the colder the weather, the more resistant the bodily mechanisms of the arctic beetle become. As the temperature drops, the volume of water in their body is reduced and antifreeze substances such as glycerol and sorbitol are produced in greater amounts. Research on this amazing creature has revealed that it can survive in temperatures as low as -87 degrees Celsius due to glycerol. It is beyond reason to expect an insect to know how to produce an organic compound with the complex formula of C₃H₈O₃ and thus protect itself from extreme cold.

The radiation expert

Scientists analyzed a surviving scorpion after an atomic bomb test, yet they couldn’t find a satisfying answer to how this animal survived the radiation shower that exterminated all other living organisms. Note that scorpions which came into existence millions of years ago are basically living fossils. Thanks to the protective system they are blessed with, in the past they have survived more powerful solar explosions and harmful radiation from outer space and the sun, and handed down these features to future generations.

The creature that never feels cold

The tardigrade, or water bear, is one of the most resistant organisms in nature.

The size of a pinhead, these microorganisms have pin-shaped hoses in their mouth.  These microorganisms have a brain, a pair of eyes, and a digestion system, but they do not have a heart or lungs.  600 different subspecies of the animal have been discovered so far. They feed mostly on moss and lichens and can survive in any environment including space.

They have been observed to survive a temperature of 120 ⁰C and a pressure of 1000 atm. In dry environments they contract, causing the water in their tissues to evaporate. During this process, the oxygen consumption of the tardigrade virtually stops. The wind carries the dried tardigrades to other places and when they find a suitable environment (wet moss or humid places) they can come back to life again.

According to Ingemar Jönsson from Kristianstadt University in Sweden who participated in studies on this organism, it is a mystery how these animals survive even when they are subjected to conditions in outer space.

Animals perform amazing tasks with mind-blowing adroitness as if each were an expert chemist. Wondrous mechanisms are activated when a need arises to protect animals from harm. It is wondrous to see how animals can carry out these complex chemical procedures as if they have been instructed at birth.

Love is the most essential component, most vivid light, and greatest power in every living creature. It can defeat any enemy.

Loveless spirits have no chance to become fully human. Even if they lived for hundreds of years, they would go no further than an infant in terms of maturity. Such love-deprived people can neither love others nor feel or sense love, and so remain trapped in their egos’ dark mazes unaware of the love cherished in creation’s heart.

The first thing all infants encounter is love. They sense the spirit of compassion and grow by leaning on hearts beating with love. Later on they may or may not find this love again, even though they search for and run after it constantly.

The sun’s face bears the marks of love. Water vapor rises toward that love, flies due to that love’s power, and then falls on the beloved Earth. All flowers smile at passers-by with that same love. The dew on the leaves twinkles and dances with love, while all animals and birds twitter together in a great choir of love.

Every creature tries to show and express a piece of this encompassing love through its perfectly composed and magnificent symphony.

Caring for others and sometimes living for others, very virtuous human qualities to which all should aspire, are the results of love. The greatest heroes are those who have a larger share of love in, as well as those who have removed hatred and malice from, their hearts.

The shortest way to conquer people’s hearts is that of love, the way followed by all Prophets. No door remains closed to such people. Even if it were possible that some doors might remain shut, thousands of others would be open on the other side. And if one could enter a heart through this way of love, every issue would be resolved successfully.

How fortunate are those who walk under the guidance of love, and how unfortunate are those who live blind and deaf to the love in their own spirits.