The Diseases of Africa

• Introduction
• Chapter 1 Malaria.
• Chapter 2 HIV/AIDS.
• Chapter 3 Diarrheal Diseases.
• Chapter 4 Tuberculosis.
• Chapter 5 Yellow Fever.
• Chapter 6 Cholera.
• Chapter 7 Typhoid Fever.
• Chapter 8 Hepatitis A and B.
• Chapter 9 Meningococcal Meningitis.
• Chapter 10 Schistosomiasis (Bilharzia).
• Chapter 11 Dengue Fever.
• Chapter 12 Rabies.
• Chapter 13 Chikungunya.
• Chapter 14 African Trypanosomiasis (Sleeping Sickness).
• Chapter 15 Rift Valley Fever.
• Chapter 16 Ebola Virus Disease.
• Chapter 17 Lassa Fever.
• Chapter 18 Polio.
• Chapter 19 Measles, Mumps, and Rubella (MMR).
• Chapter 20 Tetanus, Diphtheria, and Pertussis.
• Chapter 21 Foodborne Illnesses (Salmonella, E. coli, Campylobacter).
• Chapter 22 Waterborne Pathogens (Cryptosporidium, Giardia).
• Chapter 23 Rickettsial Diseases (African Tick Bite Fever).
• Chapter 24 Onchocerciasis (River Blindness).
• Chapter 25 Lymphatic Filariasis.

The name ‘Africa’ conjures a cascade of potent images. For many, it is a land of sweeping savannas teeming with iconic wildlife, of vast, silent deserts and lush, impenetrable jungles. It is the cradle of humanity, a continent of vibrant cultures, ancient traditions, and a rhythm of life that is at once deeply resonant and exhilaratingly new. The prospect of standing on the rim of the Ngorongoro Crater, navigating the bustling markets of Marrakesh, or feeling the spray of the Victoria Falls is a powerful lure, drawing millions of visitors each year to its shores for adventure, work, or a new place to call home. It is a continent that promises transformation, a place that gets under your skin in the best possible way.

Alongside this undeniable magic, however, runs a parallel narrative, one of health and disease. This, too, is a part of the African story. It’s a reality born of the continent’s unique tropical environment, its incredible biodiversity, and the complex socio-economic fabric that stretches across its more than fifty nations. For the unprepared traveler or new resident, this aspect of life in Africa can seem daunting, a source of anxiety that can overshadow the excitement of the journey. Whispers of malaria, yellow fever, and a host of other unfamiliar illnesses can be enough to give even the most seasoned traveler a moment of pause.

This book is born from a simple conviction: that a journey to Africa should be defined by its wonders, not by worry. Its purpose is not to frighten or deter, but to empower. It is a practical guide intended to demystify the health challenges of the continent, transforming apprehension into awareness and fear into sensible preparation. By understanding the diseases you may encounter—how they are transmitted, how they can be avoided, and what to do if you fall ill—you reclaim control. You shift from being a potential victim of circumstance to being an informed, proactive, and confident traveler.

The information within these pages is designed for the layperson: the tourist planning a two-week safari, the expatriate moving for a multi-year work assignment, the volunteer embarking on a humanitarian mission. It is not a medical textbook for infectious disease specialists. The language is straightforward, the advice is practical, and the goal is singular: to provide you with the knowledge you need to stay healthy while you experience all that this magnificent continent has to offer. Consider this book a vital part of your packing list, as essential as your passport and a good pair of walking shoes.

It is easy to wonder why a book dedicated to the diseases of a specific continent is necessary. After all, illness is a universal human experience. The answer lies in the unique epidemiological landscape of Africa. The term ‘tropical medicine’ exists for a reason; the equatorial belt that encompasses a vast portion of Africa provides the perfect year-round conditions of heat and humidity for a host of life forms, including the vectors that transmit disease. Mosquitoes, tsetse flies, ticks, and freshwater snails find a paradise in these climates, and they are the unwitting couriers for many of the ailments discussed in this book.

The continent's immense biodiversity also plays a crucial role. While a rich variety of flora and fauna is one of Africa’s main draws, it also means a rich variety of pathogens and animal reservoirs for those pathogens. A number of diseases, from Rift Valley Fever to Ebola, are zoonotic, meaning they originate in animals before making the leap to humans. The close interaction between human populations and the natural environment in many parts of the continent creates pathways for these transmissions that may not exist elsewhere.

Furthermore, the public health infrastructure across the continent is varied. While major cities may boast excellent medical facilities, access to quality healthcare can be challenging in more rural or remote areas—often the very places that draw travelers seeking unspoiled nature. Understanding this variability is key to proper preparation, particularly in knowing what to do and where to go should you require medical assistance. This is not a criticism, but a statement of fact that has practical implications for any traveler.

For visitors from more temperate, developed regions, the health environment in much of sub-Saharan Africa can be a significant change. Diseases that have been eradicated or are vanishingly rare back home, such as polio and measles, can still pose a risk. Conversely, you are highly unlikely to encounter African Trypanosomiasis, or Sleeping Sickness, on a stroll through the parks of Europe or North America. This fundamental difference in the microbial landscape is what makes a specialized guide not just helpful, but essential for safe travel.

This book is built on the philosophy of "prepared, not paranoid." The litany of diseases in the table of contents can seem intimidating, but it is crucial to maintain perspective. Millions of people travel to, live in, and work across Africa every year without incident. The vast majority of health issues encountered by travelers are not exotic or life-threatening, but mundane complaints like sunburn, dehydration, or a simple case of traveler's diarrhea. Yet, the more serious diseases do exist, and ignoring them would be foolish.

The key is to replace vague anxiety with targeted, sensible precautions. Being worried about "getting sick in Africa" is not a strategy. Knowing to take anti-malarial medication, use insect repellent, and sleep under a bed net is a strategy. This guide is designed to provide you with those specific strategies. By understanding the risks and taking the recommended steps to mitigate them, you free yourself to engage with your surroundings fully, rather than viewing every meal, every insect, and every interaction through a lens of suspicion.

Think of it like this: when you learn to drive, you are taught about the risks of the road. You learn about speed limits, traffic signals, and the dangers of drink-driving. This knowledge doesn't make you afraid to get in a car; it makes you a safer, more competent driver. Similarly, understanding the health landscape of Africa makes you a smarter, more resilient traveler. The goal is to make health precautions a routine part of your planning and daily habits, allowing them to fade into the background so you can focus on the purpose and pleasure of your trip.

The journey to a healthy trip to Africa begins long before you board the plane. Proper preparation is the single most important factor in safeguarding your well-being. This process should start at least four to six weeks before your departure, as some vaccinations require multiple doses or take time to become fully effective. The first and most critical step is to schedule a consultation with your doctor or, even better, a travel medicine specialist. They can provide personalized advice based on your specific itinerary, your length of stay, your planned activities, and your personal medical history.

This pre-travel consultation is not the time to be shy. Be prepared to discuss exactly where you are going. Health risks can vary significantly not just from country to country, but within regions of a single country. The risks in a major city like Johannesburg are different from those in a rural game park in the Kruger region. Mention the types of activities you’ll be doing. A business traveler staying in air-conditioned hotels faces a different risk profile than a backpacker trekking through the jungle or a volunteer working in a rural clinic.

Vaccinations are the cornerstone of pre-travel preparation. Your travel health advisor will review your routine immunizations to ensure you are up-to-date on shots for measles, mumps, and rubella (MMR), tetanus, diphtheria, and polio. Beyond these, they will recommend travel-specific vaccines. Hepatitis A, transmitted through contaminated food and water, is one of the most common vaccine-preventable diseases for travelers worldwide. Typhoid, also a food and waterborne illness, is another common recommendation for travel to developing regions.

Depending on your destination, more specific vaccines may be required or strongly recommended. The most notable of these is for Yellow Fever, a mosquito-borne viral illness. Many countries in the "yellow fever belt" of Africa require all incoming travelers to present an International Certificate of Vaccination or Prophylaxis (ICVP) as proof of immunization. Without this certificate, you may be denied entry. Others include the vaccine for Meningococcal Meningitis, especially for those traveling to the "meningitis belt" of sub-Saharan Africa during the dry season (December to June).

Your pre-travel consultation is also the time to discuss malaria prevention. For most travelers visiting risk areas, this will involve a course of anti-malarial medication, or prophylaxis. There are several different types of medication available, and your doctor will help you choose the one best suited to your itinerary and personal health profile. It is absolutely critical to take this medication exactly as prescribed—before, during, and for a specified period after your trip—to ensure its effectiveness.

Beyond pills and shots, assembling a personal medical kit is a vital preparatory step. While you can find pharmacies in major African cities, they may not carry the specific brands you are used to, and in remote areas, supplies can be scarce. Your kit should go beyond simple bandages and antiseptic wipes. It should be tailored to your needs and your destination. Essential items include any prescription medications you take regularly—bring enough for your entire trip, plus extra in case of delays. Always carry these in their original packaging with a copy of your doctor's prescription.

Other key items include a good quality insect repellent containing DEET, picaridin, or another effective ingredient; over-the-counter pain relievers; antihistamines for allergic reactions; anti-diarrhea medication; and oral rehydration salts to combat dehydration. Sunscreen with a high SPF and a good quality moisturizer or after-sun lotion are also non-negotiable. The African sun can be relentless, and a bad sunburn can ruin a trip as surely as any illness. Your travel doctor may also provide a prescription for a broad-spectrum antibiotic for self-treatment of severe traveler's diarrhea.

Finally, and this cannot be overstated, you must arrange comprehensive travel health insurance before you leave. This is not an optional extra; it is an absolute necessity. Your domestic health plan is unlikely to cover you overseas. Should you require medical attention in Africa, costs can escalate quickly, especially if you need to be treated at a private facility geared towards expatriates and tourists. A simple consultation and a course of medication can be expensive, and a serious illness or accident requiring hospitalization can be financially ruinous.

Your insurance policy must include coverage for medical evacuation. If you fall seriously ill or are injured in a remote location, you may need to be airlifted to a major city with a higher standard of medical care, or even repatriated to your home country. The cost of medical evacuation can run into the tens or even hundreds of thousands of dollars. Read the fine print of your policy carefully. Ensure it covers your destination and any specific activities you have planned, such as scuba diving or trekking. Keep a copy of your policy and the 24-hour emergency assistance number with you at all times.

Once you arrive in Africa, a few basic principles of prevention, consistently applied, will be your strongest defense against the majority of health risks you might face. These can be distilled into a few key areas of focus. The first, and perhaps most important, is avoiding insect bites. A staggering number of diseases covered in this book are transmitted by insects: malaria, dengue fever, yellow fever, chikungunya, sleeping sickness, and tick bite fever are just a few. Preventing the bite prevents the disease.

Your first line of defense is your clothing. When you are outdoors, especially during the dawn and dusk hours when malaria-transmitting mosquitoes are most active, wear long-sleeved shirts, long trousers, and socks. Light-colored clothing may be less attractive to some insects. For exposed skin, use a high-quality insect repellent. Reapply it as directed, especially after swimming or sweating.

Where you sleep is also critical. If your accommodation is not well-screened or air-conditioned, a mosquito net is essential. The most effective nets are those that have been treated with insecticide, such as permethrin. Ensure the net is tucked in securely under the mattress and that it has no holes. Before going to bed, it’s always a good idea to check your room for any lurking mosquitoes. These simple habits, practiced every day, are your most powerful tool in the fight against vector-borne disease.

The second golden rule of staying healthy is to be vigilant about what you eat and drink. The old traveler’s adage, "Boil it, cook it, peel it, or forget it," is as true today as it ever was. The vast majority of traveler's diarrhea cases, along with more serious illnesses like cholera, typhoid fever, and hepatitis A, are contracted by consuming contaminated food or water.

When it comes to water, your safest bet is always sealed, bottled water. If that is not available, water must be purified. The most reliable method is to bring it to a rolling boil for at least one minute. Chemical disinfection with iodine or chlorine tablets or filtration with a high-quality portable filter are also effective options. Do not assume that tap water is safe to drink, even in upscale hotels. Be wary of ice in your drinks, as it may have been made from unsafe tap water. Use purified or bottled water to brush your teeth.

Be equally cautious with food. Eat foods that have been thoroughly cooked and are served steaming hot. Avoid raw or undercooked meats and fish. Be wary of salads and other uncooked vegetables, as they may have been washed in contaminated water. Fruits that you can peel yourself, such as bananas and oranges, are generally safe. Street food can be a highlight of any trip, but choose vendors with care. Look for places that are busy with a high turnover of local customers, and where you can see the food being cooked fresh in front of you. Avoid unpasteurized dairy products, such as milk and cheese.

The third area of focus concerns the environment and its non-human inhabitants. First, respect the sun. The equatorial sun is incredibly strong, and you can get a serious sunburn in a very short amount of time. Wear a wide-brimmed hat, use a high-SPF sunscreen liberally, and try to stay out of the direct sun during the hottest part of the day. Dehydration is another common and debilitating problem. Drink plenty of fluids, especially water, throughout the day, even if you don't feel thirsty.

Second, avoid contact with animals, both wild and domestic. Rabies is a fatal but preventable disease found throughout Africa. The virus is transmitted through the saliva of an infected animal, usually via a bite or scratch. Never attempt to pet or feed any animal, no matter how friendly or cute it may appear. This includes stray dogs and cats in cities, as well as monkeys at tourist sites. If you are bitten or scratched by any animal, you must seek medical attention immediately, even if you have had a pre-travel rabies vaccination.

Finally, be cautious around freshwater sources in certain areas. Lakes, rivers, and streams can be home to the snails that carry the parasite responsible for schistosomiasis, also known as bilharzia. The parasite enters the body by burrowing through unbroken skin. Unless you have been assured by a reliable local authority that a body of water is safe, it is best to avoid swimming, wading, or bathing in it. Chlorinated swimming pools are safe.

Even with the best preparation, you or a travel companion may fall ill. The first step is not to panic. The majority of ailments will be minor and self-limiting. However, you should not ignore your symptoms, especially fever. A fever in a traveler who has been to a malaria-risk area should be considered a medical emergency until proven otherwise. Seek a diagnosis and treatment from a reputable clinic or hospital without delay. Malaria can become life-threatening very quickly, but it is treatable if caught early.

Before your trip, it’s wise to identify some reputable medical facilities in the areas you will be visiting. Your embassy or consulate can often provide a list of recommended doctors and hospitals. Major hotels can also be a good source of information. Your travel insurance provider will have a 24-hour assistance line that can also direct you to appropriate medical care. When you see a doctor, be sure to give them a complete travel history, including where you have been, for how long, and what preventative measures you have been taking.

This book is structured to be an easy-to-use reference. Each chapter is dedicated to a specific disease or a group of related illnesses. You will find information on where the disease is found, how it is transmitted, what its typical symptoms are, what preventative measures you can take, and what to do if you think you are infected. You can use the book to prepare before you go, focusing on the chapters relevant to your destination. You can also use it as a reference on the ground, should you or someone you are with develop worrying symptoms.

While this guide is comprehensive, it is not a substitute for professional medical advice. The information here is intended to inform your conversations with a travel health specialist and to guide your actions while abroad. Health recommendations and disease patterns can change, so it is always important to seek the most up-to-date information before you travel. The ultimate authority on your personal health is and always must be a qualified medical professional.

Africa is a continent of immense scale, profound beauty, and incredible diversity. It offers experiences that can change your perspective and create memories that will last a lifetime. By taking your health and safety seriously, you are not diminishing the adventure; you are enabling it. The goal of this book is to help you manage the risks so you can fully embrace the rewards. The informed traveler is a safe traveler, and a safe traveler is one who is free to experience the true magic of Africa. We hope this guide helps you on your way to a healthy, happy, and unforgettable journey.

If there is one disease synonymous with Africa in the minds of travelers, it is malaria. It is the undisputed heavyweight champion, the one ailment that commands respect and demands preparation. Malaria is a serious and sometimes fatal disease caused by a parasite that infects a specific type of mosquito which feeds on humans. While the prospect of contracting malaria can be intimidating, it is crucial to understand from the outset that it is almost always preventable and, if contracted, treatable. Armed with the right knowledge and a consistent set of preventative habits, you can dramatically reduce your risk and ensure your African journey is defined by its highlights, not by health scares.

The disease is a tale of two actors: a microscopic parasite and its flying accomplice. The culprits are parasites of the genus Plasmodium. There are five species that infect humans, but one reigns supreme in Africa and is responsible for the vast majority of severe cases and deaths: Plasmodium falciparum. This is the species you need to be most concerned about. The other species, such as P. vivax and P. ovale, are less common in Africa and generally cause a less severe, though still unpleasant, illness. The parasite is transmitted between humans through the bites of infected female Anopheles mosquitoes. The female mosquito requires a blood meal to produce eggs, and it is during this feeding that she can pass the parasites from her saliva into a person's bloodstream. Once in the body, the parasites travel to the liver, where they mature and multiply. From there, they invade red blood cells, which is when the symptoms of the disease begin.

Understanding where you are at risk is fundamental to your preparation. Malaria is present in large areas of Central, East, West, and Southern Africa. The World Health Organization (WHO) consistently reports that the African region bears the heaviest burden of the disease globally, with countries like Nigeria, the Democratic Republic of the Congo, Uganda, and Mozambique reporting high numbers of cases. The risk is highest in tropical, humid regions, particularly during and immediately after the rainy seasons, when mosquito populations boom. However, risk is not uniform. There is generally little to no malaria in the desert regions of the north and south (with the exception of some oases), at very high altitudes (generally above 2,000 meters or 6,500 feet), and in many major cities and parts of South Africa. For instance, while Kruger National Park in South Africa is a malaria-risk area, cities like Cape Town and Johannesburg are not. Your travel health advisor will have the most up-to-date information for your specific destinations.

One of the most dangerous aspects of malaria is its ability to mimic other, more common illnesses. The initial symptoms are often non-specific and flu-like. They typically appear 10 to 15 days after the infective mosquito bite, though this incubation period can be shorter or much longer. You might experience cycles of fever, shaking chills, and profuse sweating. These can be accompanied by headaches, muscle and joint pain, fatigue, nausea, vomiting, and diarrhea. Because these symptoms are so generic, it’s easy to dismiss them as "just a touch of the flu" or a stomach bug. This can be a fatal mistake.

With P. falciparum, uncomplicated malaria can rapidly progress to severe malaria, which is a medical emergency. The parasites can cause red blood cells to become sticky, clogging small blood vessels and damaging vital organs. This can lead to life-threatening complications. One of the most feared is cerebral malaria, where the blood supply to the brain is obstructed, causing confusion, seizures, and coma. Other severe complications include severe anemia from the destruction of red blood cells, respiratory distress from fluid accumulation in the lungs (pulmonary edema), and kidney or liver failure. Without treatment, cerebral malaria is almost always fatal, and even with treatment, mortality rates can be as high as 20%. This is why the unbreakable rule for any traveler, both during their trip and for up to a year after returning, is this: any fever is malaria until proven otherwise. Seek immediate medical attention.

Given the seriousness of the disease, prevention is paramount. The strategy for preventing malaria is often summarized by the "ABCD" approach: Awareness of the risk, Bite prevention, Chemoprophylaxis (taking anti-malarial pills), and prompt Diagnosis and treatment. This layered defense is your best bet for staying healthy.

Awareness of risk, as discussed, means knowing the malaria situation at your destination. This dictates the specific preventative measures you need to take. This is the first conversation to have with your travel doctor.

Bite prevention is the single most important pillar, because if you don’t get bitten, you can’t get malaria. This is a 24/7 job, but it requires extra vigilance during the peak biting times of the Anopheles mosquito, which is a nocturnal feeder, primarily active from dusk until dawn. Your first line of defense is your clothing. In the evenings and early mornings, wear long-sleeved shirts, long trousers, and socks. Light-colored clothing may be slightly less attractive to mosquitoes. For any exposed skin, apply a high-quality insect repellent. Products containing DEET (concentration of 30-50%), picaridin, or oil of lemon eucalyptus are proven to be effective. Apply it after your sunscreen and reapply as directed.

Your sleeping arrangements are critical. The gold standard is sleeping in a well-screened or air-conditioned room. If this isn't possible, a mosquito net is non-negotiable. For maximum protection, use a net that has been treated with an insecticide like permethrin. Make sure the net is tucked securely under your mattress and has no holes. It’s also wise to spray your room with an insecticide before you go to bed to kill any mosquitoes that may have gotten inside. These simple habits, applied consistently, are your most powerful weapons.

Chemoprophylaxis is the "C" in the ABCD approach and involves taking prescription anti-malarial medication to prevent the disease. It's important to understand that these drugs are not a vaccine. They don't stop you from being bitten, but work by killing the parasites in your liver or blood before they can multiply and make you sick. Because no anti-malarial drug is 100% effective, it must always be used in combination with rigorous bite prevention. There are several effective medications available, and your doctor will help you choose the best one based on your itinerary, medical history, and budget. The most commonly prescribed options for travel to Africa, where chloroquine-resistant malaria is widespread, are Atovaquone/proguanil (Malarone), Doxycycline, and Mefloquine (Lariam).

Atovaquone/proguanil is taken daily, starting one to two days before entering a malaria zone, every day during your stay, and for seven days after leaving. It is generally very well tolerated, with minimal side effects. Doxycycline is also a daily pill, started one to two days before travel but must be continued for four weeks after your trip. It is effective and inexpensive, but it can increase your skin's sensitivity to the sun, so a high-SPF sunscreen is essential, and it may cause gastrointestinal upset. Mefloquine is taken weekly, starting one to two weeks before travel and continuing for four weeks after. Its convenience is a plus, but it has been linked to potential neuropsychiatric side effects, including vivid dreams, anxiety, and, rarely, more severe reactions, so it's not suitable for everyone. Whichever drug you are prescribed, taking it exactly as directed is absolutely critical for it to be effective. Do not skip doses, and make sure you complete the full course after you leave the risk area. This is essential to kill any parasites that may still be incubating in your liver.

The final pillar is prompt Diagnosis and treatment. If you develop a fever or flu-like illness during or after your travels, you must seek immediate medical help and tell the doctor about your travel history. Don't delay. A simple blood test can diagnose malaria. The two main methods are a rapid diagnostic test (RDT), which detects parasite antigens and gives a result in minutes, and microscopy, where a technician examines a blood smear to see the parasites. Treatment for uncomplicated malaria, usually with an artemisinin-based combination therapy (ACT), is highly effective if started early.

Certain travelers are at a higher risk of developing severe malaria and need to take extra precautions. Pregnant women are particularly vulnerable. Malaria in pregnancy increases the risk of severe illness for the mother, as well as miscarriage, stillbirth, and low birth weight for the baby. It is strongly advised that pregnant women avoid travel to high-risk malaria areas if at all possible. If travel is unavoidable, strict adherence to bite prevention and chemoprophylaxis (mefloquine is generally considered the drug of choice during pregnancy) is essential. Young children and the elderly are also at higher risk of severe disease.

A special word of caution is needed for long-term expatriates and travelers visiting friends and relatives (VFRs). It is a common and dangerous misconception that people of African heritage who have moved away from the continent retain their immunity to malaria. Any partial immunity that may have been acquired from growing up in a malaria-endemic area wanes quickly, often within months. These VFR travelers are often at the highest risk because they may not perceive their danger, are less likely to take preventative medication, and may stay in local homes without adequate screening or nets. Similarly, studies show that adherence to preventative measures among long-term expatriates decreases the longer they stay, leading to an increased risk of infection. The risk is cumulative; the longer your exposure, the greater your chance of encountering an infected mosquito.

Finally, let's dispel a few persistent myths. A gin and tonic will not protect you; the amount of quinine in modern tonic water is minuscule and has no protective effect. Not seeing or hearing any mosquitoes does not mean they aren't there; the female Anopheles is a stealthy biter. Taking your anti-malarial pills does not give you a free pass to be careless about bites; they reduce your risk but are not an impenetrable shield. And do not be tempted to buy anti-malarial drugs from local pharmacies overseas, as they may be substandard or counterfeit. Get all your medication from a reputable source in your home country before you leave.

Malaria is, without question, the most significant infectious disease risk for most travelers to Africa. It is a formidable opponent and must be treated with respect. However, it is a risk that can be successfully managed. By understanding how the disease is transmitted, diligently protecting yourself from bites, and faithfully taking your preventative medication, you can reclaim your peace of mind. Preparation and consistency are your keys to success, allowing you to turn your focus from the mosquito in your room to the elephant outside your window.