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Communicable Diseases Agency
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Diseases

Find common and emerging communicable diseases and information on transmission, symptoms, and prevention.

Last updated 7 November 2025

Bacterial vaginosis

Bacterial vaginosis is a condition where different types of bacteria affect the acidity of a vagina.

Botulism

Botulism is a rare but potentially deadly condition caused by a toxin produced by the bacteria Clostridium botulinum which is present in the natural environment.

Campylobacteriosis

Campylobacteriosis is a foodborne disease that is caused by the Campylobacter bacteria.

Chickenpox (Varicella)

Chickenpox, also known as varicella, is a highly contagious disease caused by the varicella-zoster virus (VZV).

Chikungunya fever

Chikungunya fever is an acute febrile disease caused by the chikungunya virus.

Chlamydia

Chlamydia is a common sexually transmitted infection (STI) caused by the bacterium Chlamydia trachomatis.

Cholera

Cholera is a gastroenteritis disease caused by the Vibrio cholerae bacteria (O1 and O139 strains).

Conjunctivitis

Conjunctivitis, also known as pink eye, is the inflammation of the conjunctiva (thin, translucent tissue lining white parts of the eye) causing the white of the eye to turn pink or red.

COVID-19

COVID-19 is a respiratory disease caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2).

Dengue fever and dengue haemorrhagic fever

Dengue fever is an acute febrile disease caused by the dengue virus.

Diphtheria

Diphtheria is a bacterial disease caused by Corynebacterium diphtheriae.

Ebola virus disease

Ebola virus disease (EVD) is a rare disease which causes severe illness, often leading to death.

Food poisoning or gastroenteritis

Gastroenteritis refers to the inflammation of the stomach and intestines, often caused by infections from bacteria, parasites, or viruses.

Genital herpes

Genital herpes is one of the most common sexually transmitted infections (STIs) that affects men and women.

Gonorrhoea

Gonorrhoea is a sexually transmitted infection (STI) caused by the bacterium Neisseria gonorrhoeae.

Haemophilus influenzae type B

Haemophilus influenzae type b (Hib) is a bacterium that can cause a range of infections, from mild to severe.

Hand, foot, and mouth disease

HFMD is a common childhood disease caused by various enteroviruses.

Hepatitis A

Hepatitis A is a liver infection caused by the hepatitis A virus.

Hepatitis B

Hepatitis B is a viral infection of the liver which can be acute (short-term) or chronic.

Hepatitis C

Hepatitis C is an inflammation of the liver caused by the Hepatitis C virus (HCV).

Human immunodeficiency virus

Human immunodeficiency virus (HIV) is a virus that weakens your body’s immune system by destroying CD4 (T-cell) lymphocytes.

Human papillomavirus

HPV stands for human papillomavirus, a common virus that can infect many parts of the body in both males and females.

Influenza - Avian

Avian influenza, commonly known as bird flu, is a contagious viral disease caused by influenza A viruses which primarily infect wild birds and poultry.

Influenza - Seasonal

Seasonal influenza, commonly known as the flu, is an acute respiratory infection caused by influenza viruses.

Japanese encephalitis

Japanese encephalitis is a mosquito-borne disease caused by the Japanese encephalitis virus.

Lassa fever

Lassa Fever is an acute viral illness caused by the lassa virus, which is known to be endemic in parts of West Africa including Benin, Ghana, Guinea, Liberia, Mali, Nigeria, and Sierra Leone, but likely exists in other West African countries as well.

Leprosy

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Leptospirosis

Leptospirosis is a bacterial disease that affects both humans and animals. It is found mainly in infected wild and domestic animals (e.g. rodents or dogs).

Malaria

Malaria is a disease caused by a parasite, Plasmodium.

Marburg virus disease

Marburg virus disease (MVD), formerly known as marburg haemorrhagic fever, is a rare disease which causes severe illness, often leading to death.

Measles

Measles is a highly communicable viral disease caused by the measles virus.

Meningococcal disease

Meningococcal disease is caused by the bacteria Neisseria meningitidis.

Middle East respiratory syndrome coronavirus

Middle East Respiratory Syndrome (MERS) is a viral respiratory disease caused by the Middle East Respiratory Syndrome Coronavirus (MERS-CoV), a novel coronavirus which causes acute respiratory illness in infected patients.

Mpox

Mpox is a virus disease caused by the monkeypox virus, a species of the Orthopoxvirus.

Mumps

Mumps is a viral infectious disease caused by the mumps virus that typically affects the salivary glands.

Murine typhus

Murine typhus is a disease that can spread from animals to humans. It is caused by the bacteria Rickettsia typhi.

Mycoplasma genitalium

Mycoplasma genitalium (MG) is a sexually transmitted infection (STI) caused by the Mycoplasma genitalium bacteria.

Nipah virus infection

Nipah virus infection is a disease that can spread from animals to humans, and in some cases, it can also spread through contaminated food or directly between humans.

Pertussis

Pertussis, also known as whooping cough, is a bacterial infection of the respiratory tract caused by Bordetella pertussis.

Plague

Plague is a disease that can spread from animals to humans, caused by the Yersinia pestis bacteria.

Pneumococcal disease

Pneumococcal disease is an infection caused by the bacterium Streptococcus pneumoniae.

Poliomyelitis

Poliomyelitis, commonly known as polio, is a highly contagious viral disease caused by the poliovirus.

Rabies

Rabies is a fatal, yet preventable, viral disease that infects the central nervous system.

Respiratory syncytial virus

RSV infection is a common cause of acute respiratory infection that affects individuals of all ages.

Rubella

Rubella, also known as German measles, is a contagious disease caused by the rubella virus that typically affects children.

Salmonellosis

Salmonellosis is a foodborne disease that is caused by the Salmonella bacteria.

Severe acute respiratory syndrome

Severe Acute Respiratory Syndrome (SARS) is a viral respiratory illness caused by SARS-associated coronavirus (SARS-CoV-1).

Shingles (Herpes zoster)

Shingles, also known as herpes zoster, is a viral infection that causes a painful rash.

Trichomoniasis

Trichomoniasis is a sexually transmitted infection (STI) of the genital tract caused by the bacteria Trichomonas vaginalis.

Tuberculosis

Tuberculosis (TB) is an infectious airborne disease caused by Mycobacterium tuberculosis.

Typhoid and paratyphoid fevers

Typhoid and paratyphoid fevers, collectively known as enteric fevers, are caused by Salmonella Typhi and Salmonella Paratyphi respectively.

Yellow fever

Yellow fever is a mosquito-borne acute viral haemorrhagic disease which is caused by the yellow fever virus.

Zika virus infection

Zika virus infection is a mosquito-borne disease caused by the Zika virus.