Communicable disease and control Emerging and re-emerging diseases -SARS -Avian flu -Leprosy -Ebola -Swine flu -Rift valley flu

Question 1: SARS (Severe Acute Respiratory Syndrome)

SARS is an emerging communicable disease caused by the SARS-CoV coronavirus, first identified in 2002. It causes a severe respiratory illness. Control measures include rapid identification and isolation of cases, contact tracing, quarantine of exposed individuals, strict infection control practices in healthcare settings, and global surveillance.

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Question 2: Avian Flu

Avian flu (e.g., H5N1, H7N9) is an emerging zoonotic disease caused by influenza viruses primarily affecting birds, with the potential to jump to humans and cause severe illness or pandemics. Control involves culling infected poultry, surveillance in animal populations, antiviral medications, vaccine development, and public health measures like avoiding contact with sick birds and practicing good hygiene.

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Question 3: Leprosy

Leprosy is a re-emerging or persistent neglected tropical disease caused by Mycobacterium leprae. It is a chronic infection primarily affecting the skin, peripheral nerves, upper respiratory tract, eyes, and testes. Control relies on early diagnosis, multi-drug therapy (MDT), contact tracing, and public health education to reduce stigma and facilitate treatment.

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Question 4: Ebola

Ebola is an emerging and re-emerging highly fatal viral hemorrhagic fever caused by the Ebola virus. Outbreaks are characterized by rapid spread and high mortality. Control strategies include rapid isolation of cases, rigorous contact tracing, safe and dignified burial practices, strict infection prevention and control in healthcare, supportive care, and the use of vaccines (e.g., Ervebo) during outbreaks.

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Question 5: Swine Flu

Swine flu, particularly the H1N1pdm09 strain that caused a pandemic in 2009, is an emerging influenza virus that originated in pigs but gained the ability to spread efficiently among humans. Control measures include vaccination (seasonal flu vaccines often include H1N1 components), antiviral drugs, surveillance, and public health interventions like promoting hand hygiene and respiratory etiquette.

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Question 6: Rift Valley Fever (RVF)

Rift Valley Fever (RVF) is an emerging and re-emerging zoonotic viral disease primarily affecting livestock, but also capable of infecting humans, often linked to periods of heavy rainfall and increased mosquito populations. Control involves vaccination of livestock, mosquito control, avoiding contact with infected animal tissues or products, and public health education to reduce human exposure.