Skip to main content
Ch. 14+15 - Principles of Disease and Epidemiology | Microbial Mechanisms of Pathogenicity
Chapter 11, Problem 14.5a

Distinguish symptoms from signs as signals of disease.

Verified step by step guidance
1
Understand that 'symptoms' are subjective experiences reported by the patient, such as pain or fatigue, which cannot be directly measured by an observer.
Recognize that 'signs' are objective evidence of disease that can be observed and measured by someone other than the patient, such as a rash or fever.
Consider that symptoms are often used by healthcare providers to understand the patient's experience and to guide further diagnostic testing.
Acknowledge that signs are critical for diagnosis as they provide tangible evidence of a disease, which can be confirmed through medical tests or examinations.
Remember that both symptoms and signs are important in the clinical assessment and management of diseases, providing a comprehensive picture of the patient's health status.

Verified Solution

Video duration:
3m
This video solution was recommended by our tutors as helpful for the problem above.
Was this helpful?

Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Symptoms

Symptoms are subjective experiences reported by the patient that indicate the presence of a disease. They are not directly observable by others and can vary greatly between individuals. Common examples include pain, fatigue, and nausea, which provide insight into the patient's condition but require personal interpretation.
Recommended video:
Guided course
05:09
Intro to Characteristics of Infectious Disease

Signs

Signs are objective indicators of disease that can be observed and measured by healthcare professionals. They include physical findings such as fever, rash, or abnormal laboratory results. Signs provide concrete evidence of a medical condition and are crucial for diagnosis and treatment planning.
Recommended video:
Guided course
05:09
Intro to Characteristics of Infectious Disease

Differentiation between Symptoms and Signs

Distinguishing between symptoms and signs is essential for accurate diagnosis and effective communication in healthcare. While symptoms reflect the patient's personal experience of illness, signs provide measurable data that can be universally recognized. Understanding this difference helps clinicians assess the severity of a condition and tailor treatment accordingly.
Recommended video:
Guided course
03:27
Differential Staining
Related Practice
Textbook Question

Which of the following statements is false?

a. E. coli never causes disease.

b. E. coli provides vitamin K for its host.

c. E. coli often exists in a mutualistic relationship with humans.

d. A disease-causing strain of E. coli causes bloody diarrhea.

124
views
Textbook Question

Among hospital patients who have infections, one-third did not enter the hospital with the infection but rather acquired it in the hospital. How do they acquire these infections? What is the method of transmission of these infections? What is the reservoir of infection?

119
views
Textbook Question

Which of the following is not one of Koch's postulates?

a. The same pathogen must be present in every case of the disease.

b. The pathogen must be isolated and grown in pure culture from the diseased host.

c. The pathogen from pure culture must cause the disease when inoculated into a healthy, susceptible laboratory animal.

d. The disease must be transmitted from a diseased animal to a healthy, susceptible animal by direct contact.

e. The pathogen must be isolated in pure culture from an experimentally infected lab animal.

140
views
Textbook Question

Which one of the following diseases is not correctly matched to its reservoir?

a. influenza-animal

b. rabies-animal

c. botulism-nonliving

d. anthrax-nonliving

e. toxoplasmosis-cats

156
views
Textbook Question

How can a local infection become a systemic infection?

120
views
Textbook Question

Use the following information to answer questions 6–7.

On September 6, a 6-year-old boy experienced fever, chills, and vomiting. On September 7, the child was hospitalized with diarrhea and swollen lymph nodes under both arms. On September 3, he had been scratched and bitten by a cat. The cat was found dead on September 5, and Y. pestis was isolated from the cat. Chloramphenicol was administered to the child from September 7, when Y. pestis was isolated from his blood. On September 17, the child's temperature returned to normal. On September 22, the child was released from the hospital.


Identify the incubation period for this case of bubonic plague.

a. September 3-5

b. September 3-6

c. September 6-7

d. September 6-17

143
views