Bacterial Diseases

Aspergillosis – Causes, Complications, and Prevention.

Definition Aspergillosis is an infection caused by a type of mold. The illnesses resulting from aspergillosis infection usually affect the respiratory system, but their signs and severity vary greatly. The mold that triggers the illnesses, Aspergillus, is everywhere, indoors and outdoors. Most strains of this mold are harmless, but a …

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Typhoid – History, Causes, Treatment and Prevention

Definition Typhoid fever is caused by Salmonella typhi bacteria. Typhoid fever is rare in industrialized countries. However, it remains a serious health threat in the developing world, especially for children. Typhoid fever spreads through contaminated food and water or through close contact with someone who’s infected. Signs and symptoms usually …

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Leprosy: Causes, Complications and Medications.

What is leprosy? Leprosy, also known as Hansen’s disease (HD), is a chronic infectious disease caused by a Mycobacterium (Mycobacterium leprae) affecting especially the skin and marginal nerves. It is characterized by the formation of nodules or macules that enlarge and spread with loss of sensation and eventually paralysis, wasting …

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Lyme disease: Causes, Symptoms and Treatment

Definition Lyme disease is caused by a bacteria, Borrelia burgdorferi, that’s transmitted to humans through a bite from an infected black-legged or deer tick. Symptoms can occur anywhere from 3 to 30 days after the bite, and symptoms can be wide-ranging, depending on the stage of the infection. Lyme disease …

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Brucellosis: Causes, Treatment and Prevention.

Definition Brucellosis is an infectious disease caused by a type of bacteria called Brucella. The bacteria can spread from animals to humans. There are several different strains of Brucella bacteria. Some types are seen in cows. Others occur in dogs, pigs, sheep, goats, and camels. Recently, scientists have seen new …

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Plague: Definition, Manifestations and Treatment.

Definition Plague is an infectious disease caused by bacteria called Yersinia pestis. These bacteria are found mainly in rodents, particularly rats, and in the fleas that feed on them. Other animals and humans usually contract the bacteria from rodent or flea bites. SEM image of Yersinia pestis History Historically, plague …

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Salmonellosis: Causes, Symptoms, Treatment and Prevention

Definition Salmonella infection (salmonellosis) is a common bacterial disease that affects the intestinal tract. Salmonella bacteria typically live in animal and human intestines and are shed through feces. Humans become infected most frequently through contaminated water or food. Types Salmonella is divided into two groups: Typhoidal Salmonella, which is made …

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Pneumonia: Causes, symptoms and treatment

Definition Pneumonia is an infection in one or both lungs. It can be caused by bacteria, viruses, or fungi. Bacterial pneumonia is the most common type in adults. Pneumonia causes inflammation in the air sacs in your lungs, which are called alveoli. The alveoli fill with fluid or pus, making …

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