Disorders and Diseases

Measles - What you need to know
by CDC
Symptoms begin to appear about 10 to 12 days after exposure to the virus. The infected person first experiences a fever lasting about 2 to 4 days that can peak as high as 103 degrees F to 105 degrees F. This is followed by the onset of cough, runny nose

Measles: General Information
by CDC
The disease of measles and the organism that causes it (a virus) share the same name. The disease is also called rubeola. Other rash-causing diseases often confused with measles are roseola (roseola infantum) and rubella (German measles), among others.

Viral Hemorrhagic Fevers
by CDC
Viral hemorrhagic fevers (VHFs) refer to a group of illnesses that are caused by several distinct families of viruses. In general, the term viral hemorrhagic fever is used to describe a severe multisystem syndrome multisystem in that multiple organ

Tick-borne Encephalitis
by CDC
Tick-borne encephalitis, or TBE, is a human viral infectious disease involving the central nervous system. The disease is most often manifest as meningitis (inflammation of the membrane that surrounds the brain and spinal cord), encephalitis

Rift Valley Fever
by CDC
Rift Valley fever (RVF) is an acute, fever-causing viral disease that affects domestic animals (such as cattle, buffalo, sheep, goats, and camels) and humans. RVF is most commonly associated with mosquito-borne epidemics during years of unusually heavy

Marburg Hemorrhagic Fever
by CDC
Marburg hemorrhagic fever is a rare, severe type of hemorrhagic fever which affects both humans and non-human primates. Caused by a genetically unique zoonotic (that is, animal-borne) RNA virus of the filovirus family, its recognition led to the creation

Lymphocytic Choriomeningitis
by CDC
Lymphocytic choriomeningitis, or LCM, is a rodent-borne viral infectious disease that presents as aseptic meningitis (inflammation of the membrane, or meninges, that surrounds the brain and spinal cord), encephalitis (inflammation of the brain)

Lassa Fever
by CDC
Lassa fever is an acute viral illness that occurs in West Africa. The illness was discovered in 1969 when two missionary nurses died in Nigeria, West Africa. The cause of the illness was found to be Lassa virus, named after the town in Nigeria

Hendra Virus Disease and Nipah Virus Encephalitis
by CDC
Hendra virus (formerly called equine morbillivirus) is a member of the family Paramyxoviridae. The virus was first isolated in 1994 from specimens obtained during an outbreak of respiratory and neurologic disease in horses and humans in Hendra

Filoviruses
by CDC
Filoviruses belong to a virus family called Filoviridae and can cause severe hemorrhagic fever in humans and nonhuman primates. So far, only two members of this virus family have been identified: Marburg virus and Ebola virus.

Crimean-Congo Hemorrhagic Fever
by CDC
Crimean-Congo hemorrhagic fever (CCHF) is caused by infection with a tick-borne virus (Nairovirus) in the family Bunyaviridae. The disease was first characterized in the Crimea in 1944 and given the name Crimean hemorrhagic fever.

Arenaviruses
by CDC
The Arenaviridae are a family of viruses whose members are generally associated with rodent-transmitted disease in humans. Each virus usually is associated with a particular rodent host species in which it is maintained.

Hemorrhagic Fever with Renal Syndrome
by CDC
Hemorrhagic fever with renal syndrome (HFRS) is a group of clinically similar illnesses caused by hantaviruses from the family Bunyaviridae. HFRS includes diseases such as Korean hemorrhagic fever, epidemic hemorrhagic fever, and nephropathis epidemica.

Pneumococcal Disease
by CDC
What is pneumococcal disease? Pneumococcal disease are infections caused by the bacteria Streptococcus pneumoniae, also known as pneumococcus. The most common types of infections caused by this bacteria include middle ear infections, pneumonia, blood

Viral Gastroenteritis (Stomach Flu)
by CDC
Gastroenteritis means inflammation of the stomach and small and large intestines. Viral gastroenteritis is an infection caused by a variety of viruses that results in vomiting or diarrhea. It is often called the stomach flu, although it is not caused

Cytomegalovirus (CMV)
by CDC
Cytomegalovirus (CMV) is found throughout the world in all geographic and socioeconomic groups, but, in general, it is more widespread in developing countries and in areas of lower socioeconomic conditions. CMV is a member of the herpesvirus family

Iron Overload and Hemochromatosis
by CDC
Hemochromatosis occurs when the body absorbs too much iron from foods (and other sources such as vitamins containing iron). This disease causes extra iron to gradually build up in the body's tissues and organs, a term called iron overload.

Human Ehrlichiosis
by CDC
Ehrlichiosis is caused by several bacterial species in the genus Ehrlichia (pronounced err-lick-ee-uh) which have been recognized since 1935. Over several decades, veterinary pathogens that caused disease in dogs, cattle, sheep, goats, and horses

Rocky Mountain Spotted Fever
by CDC
Rocky Mountain spotted fever is the most severe and most frequently reported rickettsial illness in the United States. It also occurs in Mexico and in Central and South America. The disease is caused by Rickettsia rickettsii, a species of bacteria

Hantavirus Pulmonary Syndrome (HPS)
by CDC
Hantavirus pulmonary syndrome (HPS) is a deadly disease from rodents. Humans can contract the disease when they come into contact with infected rodents or their urine and droppings. HPS was first recognized in 1993 and has since been identified throughout