Typhoid fever is caused by bacteria in contaminated food or drink. In 1903, an outbreak of typhoid fever in Ithaca, New York, killed almost 80 people. In addition, more than 1,000 Ithaca residents became sick with the disease. The population shares the public water source. Which type of limiting factor was involved in the typhoid outbreak that occurred in Ithaca?

Disease is a density-dependent limiting factor because it spreads more readily when individuals share space or resources. Ithaca residents shared a public water source contaminated with typhoid bacteria, allowing the disease to spread through the population. Therefore, the outbreak involved a density-dependent factor.

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