SlideShare a Scribd company logo
During her quarantine, Mary Mallon secretly had her feces tested by an independent laboratory.
The lab did not detect any Salmonella. How would you explain this finding biologically
Solution
Mary Mallon was an intermittent carrier of typhoid. In intermittent or asymptomatic carriers, the
organism may lie dormant for long periods and reproduce during certain periods. So, the
specimens of the carriers need not necessarily give positive results for the test organism. As
Mary Mallon is an intermittent carrier, her species specimens could be positive sometimes and
negative sometimes.

More Related Content

More from archiespink

Complete the table for each of these major NTs. SolutionNeurot.pdf
Complete the table for each of these major NTs.  SolutionNeurot.pdfComplete the table for each of these major NTs.  SolutionNeurot.pdf
Complete the table for each of these major NTs. SolutionNeurot.pdf
archiespink
 
Arrange the following enzymes in the order of their action during DNA.pdf
Arrange the following enzymes in the order of their action during DNA.pdfArrange the following enzymes in the order of their action during DNA.pdf
Arrange the following enzymes in the order of their action during DNA.pdf
archiespink
 
[10] Write a Java application which first reads data from the phoneb.pdf
[10] Write a Java application which first reads data from the phoneb.pdf[10] Write a Java application which first reads data from the phoneb.pdf
[10] Write a Java application which first reads data from the phoneb.pdf
archiespink
 
Which of the following enzymes does not catalyze the formation of a .pdf
Which of the following enzymes does not catalyze the formation of a .pdfWhich of the following enzymes does not catalyze the formation of a .pdf
Which of the following enzymes does not catalyze the formation of a .pdf
archiespink
 
Which group is shown as an ion hat are bonded to one of the carbon .pdf
Which group is shown as an ion hat are bonded to one of the carbon .pdfWhich group is shown as an ion hat are bonded to one of the carbon .pdf
Which group is shown as an ion hat are bonded to one of the carbon .pdf
archiespink
 
Where is the specific location in an animal where cells are undergoin.pdf
Where is the specific location in an animal where cells are undergoin.pdfWhere is the specific location in an animal where cells are undergoin.pdf
Where is the specific location in an animal where cells are undergoin.pdf
archiespink
 
Which of the following is the oldest synapomorphy found in all anima.pdf
Which of the following is the oldest synapomorphy found in all anima.pdfWhich of the following is the oldest synapomorphy found in all anima.pdf
Which of the following is the oldest synapomorphy found in all anima.pdf
archiespink
 
uicfise 8f Tea Par . A coherent and strong national leadership is an .pdf
uicfise 8f Tea Par . A coherent and strong national leadership is an .pdfuicfise 8f Tea Par . A coherent and strong national leadership is an .pdf
uicfise 8f Tea Par . A coherent and strong national leadership is an .pdf
archiespink
 
To discourage cheating, a professor makes throe different versions of.pdf
To discourage cheating, a professor makes throe different versions of.pdfTo discourage cheating, a professor makes throe different versions of.pdf
To discourage cheating, a professor makes throe different versions of.pdf
archiespink
 
The number of messages arriving at a multiplexer is a Poisson random .pdf
The number of messages arriving at a multiplexer is a Poisson random .pdfThe number of messages arriving at a multiplexer is a Poisson random .pdf
The number of messages arriving at a multiplexer is a Poisson random .pdf
archiespink
 
The most liquid of the money market securities are a. T-Bills. b. co.pdf
The most liquid of the money market securities are a. T-Bills. b. co.pdfThe most liquid of the money market securities are a. T-Bills. b. co.pdf
The most liquid of the money market securities are a. T-Bills. b. co.pdf
archiespink
 
The data below represents 40 samples taking from an assembly line th.pdf
The data below represents 40 samples taking from an assembly line th.pdfThe data below represents 40 samples taking from an assembly line th.pdf
The data below represents 40 samples taking from an assembly line th.pdf
archiespink
 
QUESTION 2 Which of the following is not one of the counterproductive.pdf
QUESTION 2 Which of the following is not one of the counterproductive.pdfQUESTION 2 Which of the following is not one of the counterproductive.pdf
QUESTION 2 Which of the following is not one of the counterproductive.pdf
archiespink
 
Please answer the following questions only if you know it.Than.pdf
Please answer the following questions only if you know it.Than.pdfPlease answer the following questions only if you know it.Than.pdf
Please answer the following questions only if you know it.Than.pdf
archiespink
 
Measure of poverty (example, the poverty line) and the distribution o.pdf
Measure of poverty (example, the poverty line) and the distribution o.pdfMeasure of poverty (example, the poverty line) and the distribution o.pdf
Measure of poverty (example, the poverty line) and the distribution o.pdf
archiespink
 
Many people incorrectly think of evolution as a completely random.pdf
Many people incorrectly think of evolution as a completely random.pdfMany people incorrectly think of evolution as a completely random.pdf
Many people incorrectly think of evolution as a completely random.pdf
archiespink
 
It is simple question.I need Requirements for building a syntax .pdf
It is simple question.I need Requirements for building a syntax .pdfIt is simple question.I need Requirements for building a syntax .pdf
It is simple question.I need Requirements for building a syntax .pdf
archiespink
 
In what way (or ways) is the current Knowledge Revolution a child of.pdf
In what way (or ways) is the current Knowledge Revolution a child of.pdfIn what way (or ways) is the current Knowledge Revolution a child of.pdf
In what way (or ways) is the current Knowledge Revolution a child of.pdf
archiespink
 
A computer with a 64-bit address uses a three-level page table. Virt.pdf
A computer with a 64-bit address uses a three-level page table. Virt.pdfA computer with a 64-bit address uses a three-level page table. Virt.pdf
A computer with a 64-bit address uses a three-level page table. Virt.pdf
archiespink
 
1. What major biomolecule has the most number of functions and why.pdf
1. What major biomolecule has the most number of functions and why.pdf1. What major biomolecule has the most number of functions and why.pdf
1. What major biomolecule has the most number of functions and why.pdf
archiespink
 

More from archiespink (20)

Complete the table for each of these major NTs. SolutionNeurot.pdf
Complete the table for each of these major NTs.  SolutionNeurot.pdfComplete the table for each of these major NTs.  SolutionNeurot.pdf
Complete the table for each of these major NTs. SolutionNeurot.pdf
 
Arrange the following enzymes in the order of their action during DNA.pdf
Arrange the following enzymes in the order of their action during DNA.pdfArrange the following enzymes in the order of their action during DNA.pdf
Arrange the following enzymes in the order of their action during DNA.pdf
 
[10] Write a Java application which first reads data from the phoneb.pdf
[10] Write a Java application which first reads data from the phoneb.pdf[10] Write a Java application which first reads data from the phoneb.pdf
[10] Write a Java application which first reads data from the phoneb.pdf
 
Which of the following enzymes does not catalyze the formation of a .pdf
Which of the following enzymes does not catalyze the formation of a .pdfWhich of the following enzymes does not catalyze the formation of a .pdf
Which of the following enzymes does not catalyze the formation of a .pdf
 
Which group is shown as an ion hat are bonded to one of the carbon .pdf
Which group is shown as an ion hat are bonded to one of the carbon .pdfWhich group is shown as an ion hat are bonded to one of the carbon .pdf
Which group is shown as an ion hat are bonded to one of the carbon .pdf
 
Where is the specific location in an animal where cells are undergoin.pdf
Where is the specific location in an animal where cells are undergoin.pdfWhere is the specific location in an animal where cells are undergoin.pdf
Where is the specific location in an animal where cells are undergoin.pdf
 
Which of the following is the oldest synapomorphy found in all anima.pdf
Which of the following is the oldest synapomorphy found in all anima.pdfWhich of the following is the oldest synapomorphy found in all anima.pdf
Which of the following is the oldest synapomorphy found in all anima.pdf
 
uicfise 8f Tea Par . A coherent and strong national leadership is an .pdf
uicfise 8f Tea Par . A coherent and strong national leadership is an .pdfuicfise 8f Tea Par . A coherent and strong national leadership is an .pdf
uicfise 8f Tea Par . A coherent and strong national leadership is an .pdf
 
To discourage cheating, a professor makes throe different versions of.pdf
To discourage cheating, a professor makes throe different versions of.pdfTo discourage cheating, a professor makes throe different versions of.pdf
To discourage cheating, a professor makes throe different versions of.pdf
 
The number of messages arriving at a multiplexer is a Poisson random .pdf
The number of messages arriving at a multiplexer is a Poisson random .pdfThe number of messages arriving at a multiplexer is a Poisson random .pdf
The number of messages arriving at a multiplexer is a Poisson random .pdf
 
The most liquid of the money market securities are a. T-Bills. b. co.pdf
The most liquid of the money market securities are a. T-Bills. b. co.pdfThe most liquid of the money market securities are a. T-Bills. b. co.pdf
The most liquid of the money market securities are a. T-Bills. b. co.pdf
 
The data below represents 40 samples taking from an assembly line th.pdf
The data below represents 40 samples taking from an assembly line th.pdfThe data below represents 40 samples taking from an assembly line th.pdf
The data below represents 40 samples taking from an assembly line th.pdf
 
QUESTION 2 Which of the following is not one of the counterproductive.pdf
QUESTION 2 Which of the following is not one of the counterproductive.pdfQUESTION 2 Which of the following is not one of the counterproductive.pdf
QUESTION 2 Which of the following is not one of the counterproductive.pdf
 
Please answer the following questions only if you know it.Than.pdf
Please answer the following questions only if you know it.Than.pdfPlease answer the following questions only if you know it.Than.pdf
Please answer the following questions only if you know it.Than.pdf
 
Measure of poverty (example, the poverty line) and the distribution o.pdf
Measure of poverty (example, the poverty line) and the distribution o.pdfMeasure of poverty (example, the poverty line) and the distribution o.pdf
Measure of poverty (example, the poverty line) and the distribution o.pdf
 
Many people incorrectly think of evolution as a completely random.pdf
Many people incorrectly think of evolution as a completely random.pdfMany people incorrectly think of evolution as a completely random.pdf
Many people incorrectly think of evolution as a completely random.pdf
 
It is simple question.I need Requirements for building a syntax .pdf
It is simple question.I need Requirements for building a syntax .pdfIt is simple question.I need Requirements for building a syntax .pdf
It is simple question.I need Requirements for building a syntax .pdf
 
In what way (or ways) is the current Knowledge Revolution a child of.pdf
In what way (or ways) is the current Knowledge Revolution a child of.pdfIn what way (or ways) is the current Knowledge Revolution a child of.pdf
In what way (or ways) is the current Knowledge Revolution a child of.pdf
 
A computer with a 64-bit address uses a three-level page table. Virt.pdf
A computer with a 64-bit address uses a three-level page table. Virt.pdfA computer with a 64-bit address uses a three-level page table. Virt.pdf
A computer with a 64-bit address uses a three-level page table. Virt.pdf
 
1. What major biomolecule has the most number of functions and why.pdf
1. What major biomolecule has the most number of functions and why.pdf1. What major biomolecule has the most number of functions and why.pdf
1. What major biomolecule has the most number of functions and why.pdf
 

Recently uploaded

Exploiting Artificial Intelligence for Empowering Researchers and Faculty, In...
Exploiting Artificial Intelligence for Empowering Researchers and Faculty, In...Exploiting Artificial Intelligence for Empowering Researchers and Faculty, In...
Exploiting Artificial Intelligence for Empowering Researchers and Faculty, In...
Dr. Vinod Kumar Kanvaria
 
Overview on Edible Vaccine: Pros & Cons with Mechanism
Overview on Edible Vaccine: Pros & Cons with MechanismOverview on Edible Vaccine: Pros & Cons with Mechanism
Overview on Edible Vaccine: Pros & Cons with Mechanism
DeeptiGupta154
 
Normal Labour/ Stages of Labour/ Mechanism of Labour
Normal Labour/ Stages of Labour/ Mechanism of LabourNormal Labour/ Stages of Labour/ Mechanism of Labour
Normal Labour/ Stages of Labour/ Mechanism of Labour
Wasim Ak
 
The Accursed House by Émile Gaboriau.pptx
The Accursed House by Émile Gaboriau.pptxThe Accursed House by Émile Gaboriau.pptx
The Accursed House by Émile Gaboriau.pptx
DhatriParmar
 
The French Revolution Class 9 Study Material pdf free download
The French Revolution Class 9 Study Material pdf free downloadThe French Revolution Class 9 Study Material pdf free download
The French Revolution Class 9 Study Material pdf free download
Vivekanand Anglo Vedic Academy
 
Unit 8 - Information and Communication Technology (Paper I).pdf
Unit 8 - Information and Communication Technology (Paper I).pdfUnit 8 - Information and Communication Technology (Paper I).pdf
Unit 8 - Information and Communication Technology (Paper I).pdf
Thiyagu K
 
STRAND 3 HYGIENIC PRACTICES.pptx GRADE 7 CBC
STRAND 3 HYGIENIC PRACTICES.pptx GRADE 7 CBCSTRAND 3 HYGIENIC PRACTICES.pptx GRADE 7 CBC
STRAND 3 HYGIENIC PRACTICES.pptx GRADE 7 CBC
kimdan468
 
Embracing GenAI - A Strategic Imperative
Embracing GenAI - A Strategic ImperativeEmbracing GenAI - A Strategic Imperative
Embracing GenAI - A Strategic Imperative
Peter Windle
 
The approach at University of Liverpool.pptx
The approach at University of Liverpool.pptxThe approach at University of Liverpool.pptx
The approach at University of Liverpool.pptx
Jisc
 
MASS MEDIA STUDIES-835-CLASS XI Resource Material.pdf
MASS MEDIA STUDIES-835-CLASS XI Resource Material.pdfMASS MEDIA STUDIES-835-CLASS XI Resource Material.pdf
MASS MEDIA STUDIES-835-CLASS XI Resource Material.pdf
goswamiyash170123
 
Supporting (UKRI) OA monographs at Salford.pptx
Supporting (UKRI) OA monographs at Salford.pptxSupporting (UKRI) OA monographs at Salford.pptx
Supporting (UKRI) OA monographs at Salford.pptx
Jisc
 
How to Make a Field invisible in Odoo 17
How to Make a Field invisible in Odoo 17How to Make a Field invisible in Odoo 17
How to Make a Field invisible in Odoo 17
Celine George
 
Language Across the Curriculm LAC B.Ed.
Language Across the  Curriculm LAC B.Ed.Language Across the  Curriculm LAC B.Ed.
Language Across the Curriculm LAC B.Ed.
Atul Kumar Singh
 
A Survey of Techniques for Maximizing LLM Performance.pptx
A Survey of Techniques for Maximizing LLM Performance.pptxA Survey of Techniques for Maximizing LLM Performance.pptx
A Survey of Techniques for Maximizing LLM Performance.pptx
thanhdowork
 
Guidance_and_Counselling.pdf B.Ed. 4th Semester
Guidance_and_Counselling.pdf B.Ed. 4th SemesterGuidance_and_Counselling.pdf B.Ed. 4th Semester
Guidance_and_Counselling.pdf B.Ed. 4th Semester
Atul Kumar Singh
 
Marketing internship report file for MBA
Marketing internship report file for MBAMarketing internship report file for MBA
Marketing internship report file for MBA
gb193092
 
Advantages and Disadvantages of CMS from an SEO Perspective
Advantages and Disadvantages of CMS from an SEO PerspectiveAdvantages and Disadvantages of CMS from an SEO Perspective
Advantages and Disadvantages of CMS from an SEO Perspective
Krisztián Száraz
 
Digital Tools and AI for Teaching Learning and Research
Digital Tools and AI for Teaching Learning and ResearchDigital Tools and AI for Teaching Learning and Research
Digital Tools and AI for Teaching Learning and Research
Vikramjit Singh
 
1.4 modern child centered education - mahatma gandhi-2.pptx
1.4 modern child centered education - mahatma gandhi-2.pptx1.4 modern child centered education - mahatma gandhi-2.pptx
1.4 modern child centered education - mahatma gandhi-2.pptx
JosvitaDsouza2
 
Chapter -12, Antibiotics (One Page Notes).pdf
Chapter -12, Antibiotics (One Page Notes).pdfChapter -12, Antibiotics (One Page Notes).pdf
Chapter -12, Antibiotics (One Page Notes).pdf
Kartik Tiwari
 

Recently uploaded (20)

Exploiting Artificial Intelligence for Empowering Researchers and Faculty, In...
Exploiting Artificial Intelligence for Empowering Researchers and Faculty, In...Exploiting Artificial Intelligence for Empowering Researchers and Faculty, In...
Exploiting Artificial Intelligence for Empowering Researchers and Faculty, In...
 
Overview on Edible Vaccine: Pros & Cons with Mechanism
Overview on Edible Vaccine: Pros & Cons with MechanismOverview on Edible Vaccine: Pros & Cons with Mechanism
Overview on Edible Vaccine: Pros & Cons with Mechanism
 
Normal Labour/ Stages of Labour/ Mechanism of Labour
Normal Labour/ Stages of Labour/ Mechanism of LabourNormal Labour/ Stages of Labour/ Mechanism of Labour
Normal Labour/ Stages of Labour/ Mechanism of Labour
 
The Accursed House by Émile Gaboriau.pptx
The Accursed House by Émile Gaboriau.pptxThe Accursed House by Émile Gaboriau.pptx
The Accursed House by Émile Gaboriau.pptx
 
The French Revolution Class 9 Study Material pdf free download
The French Revolution Class 9 Study Material pdf free downloadThe French Revolution Class 9 Study Material pdf free download
The French Revolution Class 9 Study Material pdf free download
 
Unit 8 - Information and Communication Technology (Paper I).pdf
Unit 8 - Information and Communication Technology (Paper I).pdfUnit 8 - Information and Communication Technology (Paper I).pdf
Unit 8 - Information and Communication Technology (Paper I).pdf
 
STRAND 3 HYGIENIC PRACTICES.pptx GRADE 7 CBC
STRAND 3 HYGIENIC PRACTICES.pptx GRADE 7 CBCSTRAND 3 HYGIENIC PRACTICES.pptx GRADE 7 CBC
STRAND 3 HYGIENIC PRACTICES.pptx GRADE 7 CBC
 
Embracing GenAI - A Strategic Imperative
Embracing GenAI - A Strategic ImperativeEmbracing GenAI - A Strategic Imperative
Embracing GenAI - A Strategic Imperative
 
The approach at University of Liverpool.pptx
The approach at University of Liverpool.pptxThe approach at University of Liverpool.pptx
The approach at University of Liverpool.pptx
 
MASS MEDIA STUDIES-835-CLASS XI Resource Material.pdf
MASS MEDIA STUDIES-835-CLASS XI Resource Material.pdfMASS MEDIA STUDIES-835-CLASS XI Resource Material.pdf
MASS MEDIA STUDIES-835-CLASS XI Resource Material.pdf
 
Supporting (UKRI) OA monographs at Salford.pptx
Supporting (UKRI) OA monographs at Salford.pptxSupporting (UKRI) OA monographs at Salford.pptx
Supporting (UKRI) OA monographs at Salford.pptx
 
How to Make a Field invisible in Odoo 17
How to Make a Field invisible in Odoo 17How to Make a Field invisible in Odoo 17
How to Make a Field invisible in Odoo 17
 
Language Across the Curriculm LAC B.Ed.
Language Across the  Curriculm LAC B.Ed.Language Across the  Curriculm LAC B.Ed.
Language Across the Curriculm LAC B.Ed.
 
A Survey of Techniques for Maximizing LLM Performance.pptx
A Survey of Techniques for Maximizing LLM Performance.pptxA Survey of Techniques for Maximizing LLM Performance.pptx
A Survey of Techniques for Maximizing LLM Performance.pptx
 
Guidance_and_Counselling.pdf B.Ed. 4th Semester
Guidance_and_Counselling.pdf B.Ed. 4th SemesterGuidance_and_Counselling.pdf B.Ed. 4th Semester
Guidance_and_Counselling.pdf B.Ed. 4th Semester
 
Marketing internship report file for MBA
Marketing internship report file for MBAMarketing internship report file for MBA
Marketing internship report file for MBA
 
Advantages and Disadvantages of CMS from an SEO Perspective
Advantages and Disadvantages of CMS from an SEO PerspectiveAdvantages and Disadvantages of CMS from an SEO Perspective
Advantages and Disadvantages of CMS from an SEO Perspective
 
Digital Tools and AI for Teaching Learning and Research
Digital Tools and AI for Teaching Learning and ResearchDigital Tools and AI for Teaching Learning and Research
Digital Tools and AI for Teaching Learning and Research
 
1.4 modern child centered education - mahatma gandhi-2.pptx
1.4 modern child centered education - mahatma gandhi-2.pptx1.4 modern child centered education - mahatma gandhi-2.pptx
1.4 modern child centered education - mahatma gandhi-2.pptx
 
Chapter -12, Antibiotics (One Page Notes).pdf
Chapter -12, Antibiotics (One Page Notes).pdfChapter -12, Antibiotics (One Page Notes).pdf
Chapter -12, Antibiotics (One Page Notes).pdf
 

During her quarantine, Mary Mallon secretly had her feces tested by .pdf

  • 1. During her quarantine, Mary Mallon secretly had her feces tested by an independent laboratory. The lab did not detect any Salmonella. How would you explain this finding biologically Solution Mary Mallon was an intermittent carrier of typhoid. In intermittent or asymptomatic carriers, the organism may lie dormant for long periods and reproduce during certain periods. So, the specimens of the carriers need not necessarily give positive results for the test organism. As Mary Mallon is an intermittent carrier, her species specimens could be positive sometimes and negative sometimes.