Class of 2020B

felt depression and remorse, which he said he could only alleviate by killing more people.

Up to 19 October, 4,877 people had been reported as having died from the disease in five countries; Liberia, Guinea, Sierra Leone, Nigeria and the United States. The total number of reported cases is in excess of 9,900.

Humans and other primates are the natural hosts for the chikungunya virus. The virus is spread to humans by the bite of an infected female Aedes species mosquito – Aedes aegypti or Aedes albopictus. These are the same tropical and sub-tropical mosquitoes that carry the dengue virus. They breed in or near human habitations and prefer to feed on humans during the daytime in shady areas, but may also bite early in the night. In Australia, Aedes aegypti currently is found in north Queensland while Aedes albopictus is found in a few locations in the Torres Strait. Infections reported in Australia are from people who have travelled overseas to regions where the chikungunya virus is present. To date chikungunya virus infection has not been transmitted by mosquitoes in Australia. However, since the mosquitoes capable of transmitting the infection are found in northern Australia there is the potential for this to occur.

Patients can progress from the initial non-specific symptoms after about 5 days to develop gastrointestinal symptoms such as severe watery diarrhea, nausea, vomiting and abdominal pain. Other symptoms such as chest pain, shortness of breath, headache or confusion, may also develop. Patients often have conjunctival injection.

The most common signs and symptoms reported from West Africa during the current outbreak from symptom-onset to the time the case was detected include: fever (87%), fatigue (76%), vomiting (68%), diarrhea (66%), and loss of appetite (65%).

Symptoms, Diagnosis, & Treatment Symptoms Most people infected with chikungunya virus will develop some symptoms. Symptoms usually begin 3–7 days after being bitten by an infected mosquito. The most common symptoms are fever and joint pain. Other symptoms may include headache, muscle pain, joint swelling, or rash. Chikungunya disease does not often result in death, but the symptoms can be severe and disabling. Most patients feel better within a week. In some people, the joint pain may persist for months. People at risk for more severe disease include newborns infected around the time of birth, older adults (≥65 years), and people with medical conditions such as high blood pressure, diabetes, or heart disease. Once a person has been infected, he or she is likely to be protected from future infections. Diagnosis The symptoms of chikungunya are similar to those of dengue, another disease spread by mosquitoes. See your doctor if you develop the symptoms described above. If you have recently traveled, tell your doctor. Your doctor may order blood tests to look for chikungunya or other similar diseases. Treatment There is no medicine to treat chikungunya virus infection or disease. Decrease the symptoms: Get plenty of rest Drink fluids to prevent dehydration Take medicines, such as ibuprofen, naproxen, acetaminophen, or paracetamol, to relieve fever and pain.