**Question:** True of the 8th Pandemic of Cholera

A. Cholera pandemics have been ongoing since 1961
B. Cholera pandemics primarily affect developed countries
C. Cholera pandemics are caused by Vibrio cholerae serotype 0139
D. Cholera pandemics have a significant impact on global health

**Core Concept:** Cholera pandemics refer to the periodic outbreaks of cholera caused by the bacterium Vibrio cholerae, particularly serotype O1 and less commonly O139. These pandemics have significant global health implications due to the potential for rapid transmission and high morbidity and mortality rates.

**Why the Correct Answer is Right:**

The 8th pandemic of cholera began in 1961 and is currently ongoing. This pandemic is characterized by the emergence of the Vibrio cholerae serotype O139, which has contributed to the persistence of the cholera pandemics. Vibrio cholerae serotype O139 was first identified in Bangladesh in 1992 and is now prevalent in several Southeast Asian countries.

**Why Each Wrong Option is Incorrect:**

A) While cholera pandemics have continued since 1961, the statement that they started in 1961 is incorrect. Cholera pandemics have been ongoing for much longer, with the 8th pandemic beginning in 1961.

B) Cholera pandemics primarily affect developed countries is not true. Cholera pandemics can affect both developed and developing countries, as the bacterium can spread through contaminated water and food, causing significant morbidity and mortality worldwide, particularly in regions with poor sanitation and access to clean water.

C) Cholera pandemics are primarily caused by Vibrio cholerae serotype O139 is incorrect. The primary cause of cholera pandemics is Vibrio cholerae serotype Ogawa and Inaba, not O139. Serotype O139 was first identified in 1992 and has contributed to the persistence of the cholera pandemics.

D) Cholera pandemics have a minimal impact on global health is incorrect. Cholera pandemics pose a significant threat to global health due to their potential for rapid transmission, high morbidity and mortality rates, and the impact on food and water security in affected regions.

**Clinical Pearl:** Understanding the different serotypes of Vibrio cholerae, including Ogawa, Inaba, and the more recently discovered serotype O139, is crucial for recognizing and controlling cholera pandemics. While serotype O139 is relatively new, serotypes Ogawa and Inaba have been known for much longer and are responsible for the majority of cholera cases globally. Improved sanitation and access to clean water can help prevent cholera pandemics and reduce their impact on global health.