Q70. Select the group containing only bacterial infections.
[MAHA TET, 23 November 2025]
- (A) Cholera, typhoid and tuberculosis
- (B) Tetanus, tuberculosis and measles
- (C) Malaria, mumps and poliomyelitis
- (D) AIDS, malaria and influenza
Answer: (A) Cholera, typhoid and tuberculosis
Explanation: Vibrio cholerae causes cholera, Salmonella Typhi causes typhoid and Mycobacterium tuberculosis causes tuberculosis. Measles, mumps, polio, influenza and AIDS are viral conditions; malaria is protozoan. Identifying the causative organism prevents misleading treatment choices.
Q69. Which condition differs because it is non-infectious: typhoid, malaria, diabetes or cholera?
[SSC JE, 6 December 2025]
- (A) Typhoid
- (B) Malaria
- (C) Diabetes
- (D) Cholera
Answer: (C) Diabetes
Explanation: Diabetes mellitus is a metabolic disorder, not an infection transmitted between people. Typhoid and cholera are bacterial infections, while malaria is caused by Plasmodium parasites. Classification as infectious or non-infectious is separate from classifying pathogens by organism type.
Q68. Baba Amte is especially remembered for working with people affected by which disease?
[MP Police Constable, 6 December 2025]
- (A) Tuberculosis
- (B) Leprosy
- (C) Cholera
- (D) Typhoid
Answer: (B) Leprosy
Explanation: Baba Amte dedicated much of his social work to supporting people affected by leprosy and combating stigma. He established Anandwan in Maharashtra, promoting rehabilitation and dignity. Leprosy is caused mainly by Mycobacterium leprae and is treatable with multidrug therapy.
Q67. Choose the set in which all three diseases are bacterial.
[SSC CGL Tier-I, 17 September 2024]
- (A) Influenza, dengue, cholera
- (B) Typhoid, cholera, tuberculosis
- (C) Dengue, malaria, cholera
- (D) Malaria, common cold, influenza
Answer: (B) Typhoid, cholera, tuberculosis
Explanation: Typhoid, cholera and tuberculosis are caused by Salmonella Typhi, Vibrio cholerae and Mycobacterium tuberculosis respectively. Dengue, influenza and the common cold are viral; malaria is protozoan. Recognising each causative agent is a core biology competency.
Q66. Which communicable disease among the following is bacterial?
[SSC MTS, 15 October 2024]
- (A) Cholera
- (B) Malaria
- (C) Dengue
- (D) Influenza
Answer: (A) Cholera
Explanation: Cholera develops after infection by toxigenic Vibrio cholerae, frequently through contaminated drinking water. Malaria is caused by protozoa, while dengue and influenza are viral. Cholera control rests on clean water, appropriate sanitation, rapid fluid replacement and vaccination when indicated.
Q65. The Widal agglutination test is historically associated with which disease?
[SSC MTS, 22 October 2024]
- (A) Pneumonia
- (B) Typhoid
- (C) Diphtheria
- (D) Influenza
Answer: (B) Typhoid
Explanation: The Widal test measures antibodies reacting with Salmonella Typhi and Paratyphi antigens. It is historically associated with enteric fever but has important accuracy limitations; blood culture is preferred for confirming typhoid where feasible. Interpretation depends on illness timing and local background titres.
Q64. Which of these is caused by bacteria rather than viruses?
[RSMSSB Women Supervisor, 22 June 2024]
- (A) Hepatitis B
- (B) AIDS
- (C) COVID-19
- (D) Typhoid
Answer: (D) Typhoid
Explanation: Typhoid is caused by Salmonella Typhi, a bacterium transmitted mainly through the faecal–oral route. Hepatitis B, AIDS and COVID-19 have viral causes. Typhoid prevention combines improved water quality, food hygiene, sanitation and appropriate vaccination.
Q63. Which listed illness is ordinarily categorised as waterborne?
[WBPSC Miscellaneous (2023 cycle), 15 September 2024]
- (A) Tuberculosis
- (B) Typhoid
- (C) Malaria
- (D) Diphtheria
Answer: (B) Typhoid
Explanation: Typhoid commonly spreads when food or water is contaminated by faeces containing Salmonella Typhi. Pulmonary tuberculosis and diphtheria are primarily respiratory infections, while malaria requires an infected Anopheles mosquito. Safe water supplies reduce enteric fever transmission.
Q62. Which of these is not a waterborne infection?
[WBMSC Sub-Assistant Engineer, 4 August 2024]
- (A) Dysentery
- (B) Cholera
- (C) Typhoid
- (D) Malaria
Answer: (D) Malaria
Explanation: Malaria is caused by Plasmodium parasites transmitted by infected female Anopheles mosquitoes, not by drinking contaminated water. Cholera and typhoid commonly spread through contaminated food or water; dysentery may be caused by several pathogens with faecal–oral transmission.
Q61. Match typhoid, leishmaniasis, ringworm and filariasis with their causative agent types.
[NEET UG, 5 May 2024]
- (A) Fungus, protozoan, nematode, bacterium
- (B) Bacterium, protozoan, fungus, nematode
- (C) Protozoan, fungus, bacterium, nematode
- (D) Nematode, bacterium, protozoan, fungus
Answer: (B) Bacterium, protozoan, fungus, nematode
Explanation: Typhoid is bacterial; leishmaniasis results from protozoan Leishmania; ringworm is fungal; and lymphatic filariasis is produced by filarial nematodes. This classification highlights why outwardly similar infectious diseases can require entirely different prevention and treatment strategies.
