In 1937, a man employed to lay water pipes was found to be the source of a severe epidemic of typhoid fever. The man, an asymptomatic carrier of Salmonella enterica serotype Typhi, the bacterium that causes typhoid, habitually urinated at his job site. In the process, he contaminated the town's water supply with bacteria from his bladder. Over 300 cases of typhoid fever developed, and 43 people died before the man was identified as the carrier.
How was this carrier identified?
a) nasal swab
b) sputum sample
c) throat swab
d) urine culture

Answers

Answer 1
Urine culture

It literally says he peed in the water

Related Questions

Which of the following is an example of homoplasy? Which of the following is an example of homoplasy? hair in humans and fur in bear streamlined bodies in dolphins and ichthyosaurs Hox genes in humans and sea stars astragalus ankle bones in camel and pig

Answers

Answer:

streamlined bodies in dolphins and ichthyosaurs

Hope this helps! (づ ̄3 ̄)づ╭❤~

Which of the following is not a negative consequence of upward urban growth?
a pollution
b creation of a "heat island"
C. increased use of surrounding land
d. waste management issues
Please select the best answer from the choices provided
A
OOOO

Answers

Answer: I believe its C

Explanation:

Answer:

C. increased use of surrounding land

Explanation:

Edge2021

Which element is being cycled through Earth's system in the image shown
below?
Fossil fuels
Cellular
respiration
Photosynthesis
Animals
Plants
Industry and Home
Death and
decay
A. Oxygen
B. Nitrogen
c. Hydrogen
O D. Carbon

Answers

I took this quiz about 2 weeks ago but I forgot the answer. I think it was Carbon but you shouldn’t trust me till someone confirms it
carbon! hope this helps!!

please help me. I been stuck on this question for a long time :(​

Answers

Answer:

Explanation:

1. Climate change is caused by changes in the earth's atmosphere in the amounts of greenhouse gases released into the air. Some scientists believe that 100% of global warming is due to humans. The largest contribution comes from burning fossil fuels because it releases carbon dioxide gas to the air, which is done by humans. Other factors that contribute to climate change include:

>Deforestation- clearing out trees affects wildlife, ecosystems, whether patterns. Forests cover 30% of the lands mass and clearing them leaves many animals without homes.

>Waste from factories- they release tonnes of toxic fumes into the air.

> Agriculture and farming- this is a surprising contributing factor to global warming. Animals produce a greenhouse gas called methane and when livestock are grazed at a large scale, the amount of methane produced is a big contributor to global warming.

     Some fertilizers release nitrous oxide, which is another greenhouse gas.

2. The effects of global warming include:

    >Melting glaciers- this leaves many animals without homes and it also causes a rise in sea levels which causes flooding. (that's 3 effects)

    >Worsening droughts- this leaves many humans to die as they have no food or water.

    >Increasing tornadoes

okay that's all i could do... hope it helps.

The first seismic waves to reach seismograph stations move in a push-and-pull motion. They are called
Love waves
secondary waves
primary waves
surface waves

Answers

Answer:

primary waves

Hope this helps :)

Answer:

hi, your answer is... primary waves.

Which of the following is a distinct structure found specifically in the liver, spleen, and bone marrow?
Select one:
a. Sinusoidal capillaries
b. Fenestrated capillaries
c. Venous sinus
d. AV anastomoses
e. Continuous capillaries​

Answers

Answer:

option A is correct

Explanation:

Rima eat guava explain how the teeth tongue and sliva will help to break it down​

Answers

Answer:

Please find the role of teeth, tongue and saliva in digesting guava below

Explanation:

Digestion is generally the process of breaking down complex food substances into their simplest form. However, as easy as this sounds, there are series of processes that must take place in between to achieve the final result.

Once a food substance like guava enters the mouth (ingestion), it initially gets chewed by the TEETH in order to break it down to smaller masses that can be swallowed. During the process of chewing, the TONGUE helps to move the food around the mouth and later helps push it down the gullet/digestive tract. SALIVA, on the other hand, creates a moisturizing environment for the food to form a Bolus (round mass of food ready to pass down the esophagus). The saliva also contains an enzyme called AMYLASE that helps chemically degrade starch content of the food before passed through the digestive tract.

When making bread why is the dough left in a warm place for a while before putting it in the oven

Answers

Answer:

so that bread will rise when heating

Explanation:

the yeast will activate and be ready to produce gases when baking

Eye color is an example of 1. Transcriptional control 2. gene expression 3. translational control 4. gene regulation

Answers

Answer: Gene expression

When a volcano erupts, tiny particles from which of Earth's spheres are released into the air?
atmosphere
biosphere
geosphere
hydrosphere

Answers

The geosphere :) that’s where the earth’s mantle and crust is which is where the volcanoes are. So, when they erupt pieces of them are released from the level which they came from (aka the geosphere) hope that helps!

When a volcano erupts, tiny particles from the geosphere are released into the air. So, the correct option is C.

What is Volcano?

A volcano is a geological formation on the surface of the Earth that develops as magma and volcanic ash build up. During an eruption, lava, ash, and gas can escape through a crater or vent that is generally shaped like a mountain.

Explosive or non-explosive eruptions can have a large negative impact on the environment, causing ash fall, landslides, and lava flows, among other things. Tiny geosphere-derived particles are discharged into the atmosphere during volcanic eruptions.

All areas of volcanism contain compound volcanoes, but these volcanic structures are most common at plate convergence zones, where one tectonic plate plunges beneath another towards the earth's mantle.

Therefore, the correct option is C.

Learn more about Volcano, here:

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what effect does smoking have on cilia.

Answers

Answer: The cilia sweep out mucus and dirt so your lungs stay clear. Smoking temporarily paralyzes and even kills cilia. This makes you more at risk for infection. Smokers get more colds and respiratory infections than non-smokers.

Explanation:

The process whereby the earth’s life changes over time through changes in genes of populations of organisms in succeeding generations is called____.a. emigration.b. mutation.c. natural selection.d. evolution.e. genetic drift.

Answers

Answer:

The correct answer is option : d. evolution.

Explanation:

Change in the heritable traits or characteristics of population of a organism over time by the adaption or changes in genes of such population over successive generation is known as the evolution.

These changes that cause the evolution of the biological population is caused by the process of adaption through natural selection that is the ability of the passing beneficial genes from parent to offspring.

Thus, the correct answer is option D. evolution.

Ultra-high-temperature sterilization effectively reduces microbes that cause spoilage. removes only mesophilic microbes. reduces microbes that cause disease. removes all microbes that cause diseases or spoilage. reduces microbes that cause disease or spoilage.

Answers

Answer:

kills all microbes that cause disease or spoilage.

Explanation:

There are different methods of sterilization, such as ultraviolet radiation, autoclave mechanisms, etc.

The sterilization mechanisms eliminate the microorganisms completely, thus generating sterile surfaces.

These mechanisms are used with surgical instruments, the operating room environment.

The autoclave method is the most widely used today due to its economical price, its ease of use and its practicality.

Sterilization methods must be strictly controlled with pilot or test microbiological cultures to be able to corroborate that these mechanisms function correctly, since otherwise they could trigger strong pathologies due to cross contamination.

I high statement best describes the scientist who contributed to our current body of scientific knowledge

Answers

Answer:

See the answer below

Explanation:

First, it may seem that the question is with a typographical error. I guess you wanted to ask, "Which statement best describes the scientist who contributed to our current body of scientific knowledge?"

To answer the question, anyone that has engaged in research following the established scientific method and was able to report the findings from the research by publishing it in a recognized journal has contributed to our current body of scientific knowledge.

In this regard, men and women of all races, through time have contributed to our current body of scientific knowledge.

what is a warning safety sign​

Answers

Answer:

Hey there!

A warning safety sign is a sign that warns you that there may be a safety hazard around you.

Let me know if this helps :)

I need help im not understanding what to do.

For this assignment, you'll be creating a document or project. Now that you have an idea of the organ systems in the human body, it’s time to choose one that interests you the most. Use the links below to find detailed information about the organ system you choose. You will use this information to create a poster in Glogster or PowerPoint that illustrates the major facts and details of the system you chose. To make it fun and interesting, create a “ Travel Guide” that takes the reader through the system, detailing the organs in that system and what they do for the body.


To complete this assignment follow these steps: Choose your organ system to profile. Research the following information about your organ system: Short description of the organ system: What does the “organ system” do? (IE: endocrine system) How is the system organized? What are the major organs in this system? What is the main or most important organ in the system? How do these organs work together to do what they do? What are the functions in the human body that are done by this organ system? What would happen to the body if this organ system “failed”, or didn’t work right? Use the links to websites to gather that information. Save any graphics you want to use in creating your Poster.
If you choose Glogster: Go to Glogster and follow their instructions in setting up an account. It’s easy and it’s free. Watch the tutorial and then get started!

Answers

Answer: Here's a power point on the endocrine system. I hope this helps.

Explanation:

please help me .Is platypus a mammal or a bird​

Answers

Answer:

Platypus is an mammal.

Explanation:

Because platypus cannot fly, and lays eggs. It does not live in nests, but in holes on the ground. The parents platypuses can have venom but the smaller ones do not have venom. This is why they are threatened by other animals.

Hope this helps....

Have a nice day!!!!

Why is mitosis important to all living things?

Answers

Answer: It's important because mitosis helps living things grow and replace  old or damaged cells.

When fats are used as an energy source, the glycerol portion enters ________ when it has been converted to ________. When fats are used as an energy source, the glycerol portion enters ________ when it has been converted to ________. glycolysis; dihydroxyacetone phosphate the electron transport system; coenzyme Q glycolysis; fructose-6-phosphate the citric acid cycle; pyruvate the citric acid cycle; acetyl CoA

Answers

Answer:

 glycolysis; dihydroxyacetone phosphate

When fats are used as an energy source, the glycerol portion enters the glycolysis when it has been converted to dihydroxyacetone phosphate. Thus, the correct option is A.

What is the Glycolysis?

Glycolysis may be defined as the process in which glucose (sugar) is partially broken down by cells in enzyme reactions that do not need oxygen.

In order to obtain energy from fats, triglycerides must be broken down into fatty acids and glycerol through hydrolysis. The fatty acids enter to Krebs cycle and are converted into acetyl CoA.

While the glycerol portion enters into glycolysis and is converted into dihydroxyacetone phosphate.

Therefore, the correct option for this question is A.

To learn more about Glycolysis, refer to the link:

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The town in this image is near an inactive volcano. If the volcano were to violently erupt, which location would be least affected by volcanic ash and lava?

Answers

Answer:

i think it is the state park im not sure but lmk if im wrong or right

Explanation:

The correct answer is the plane, as it is flying in the sky, but the lava from the volcano after its eruption can easily flow down to the park, hospitals, etc., and the plane is least about to be affected by the volcanic eruption.

What is a volcanic eruption?

A volcanic eruption is a natural phenomenon that occurs when magma, ash, and gases are expelled from a volcanic vent or fissure in the Earth's surface. Volcanic eruptions can range from relatively small and quiet to explosive and violent, and they can have significant impacts on the environment and on human populations. Volcanic ash and lava can be carried by the wind over large distances, so the direction of the wind and its strength are important factors in determining which areas will be most affected. Areas that are located upwind from the volcano are likely to be more affected by volcanic ash and lava than areas that are located downwind.

Hence, the correct answer is the plane, as it is flying in the sky, but the lava from the volcano after its eruption can easily flow down to the park, hospitals, etc.

Learn more about the volcanic eruption here.

https://brainly.com/question/30791271

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During the process of translation in a eukaryote messenger RNA is spliced in the nucleus. amino acids are synthesized by RNA polymerase. transfer RNAs are joined together by a large enzyme complex. ribosomes must be imported into the nucleus. mRNA interacts with ribosomes in the cytoplasm.

Answers

Answer:

mRNA interacts with ribosomes in the cytoplasm.

Explanation:

The correct option would be that mRNA interacts with ribosomes in the cytoplasm.

Translation involves the use of genetic codes in mRNA to synthesize amino acids that are eventually linked together by polypeptide bonds to form proteins.

During translation, the mRNA synthesized in the nucleus is transported into the cytoplasm where it gets attached to the ribosome and another RNA - the tRNA. The codons on the mRNA eventually match with the anticodon of the tRNA with the later releasing the amino acid that corresponds to each codon.

Hence, the correct answer out of all the options is that mRNA interacts with ribosomes in the cytoplasm.

A student finds that the mass of 25mL of an unknown liquid is 20.5g. What is the density of this substance?

Answers

Answer:

Density, [tex]d=0.82\ g/cm^3[/tex]

Explanation:

It is given that,

Mass of unknown liquid is 20.5 kg

Volume, V = 25 mL

We know that, 1 mL = 1 cm³

25 mL = 25 cm³

The density of the substance is equal to its mass per unit volume. So,

[tex]d=\dfrac{m}{V}\\\\d=\dfrac{20.5\ g}{25\ cm^3}\\\\d=0.82\ g/cm^3[/tex]

So, the density of this substance is [tex]0.82\ g/cm^3[/tex].

Answer:

0.82

Explanation:

just took test

which best describes bacterium?

Answers

Answer:

Bacteria (singular: bacterium) are classified as prokaryotes, which are single-celled organisms with a simple internal structure that lacks a nucleus, and contains DNA that either floats freely in a twisted, thread-like mass called the nucleoid, or in separate, circular pieces called plasmids. Hope this helps :))

Explanation:

Answer:

Bacteria are classified as prokaryotes, which are single-celled organisms with a simple internal structure that lacks a nucleus, and contains DNA that either floats freely in a twisted, thread-like mass called the nucleoid, or in separate, circular pieces called plasmids.

Explanation:

how do i explain this?

Answers

Answer:

Oxygen debt is a physiological phenomenon in which a person consume oxygen at fater rate that it replaced by new oxygen molecules.

As shown in the graph, oxygen debt occurs just after the end of exercise because oxygen is consumed at faster rate during exercise that leads to  increased respiration and body attempts to replace the used oxygen.

To overcome the problem of oxygen debt, a person should take rest that allows the body to replenish its oxygen supply.

Why is environmental science important?

Answers

Explanation:

it is where we live and share resources with order species

I hope this was helpful

difference between photosynthesis and respiration​

Answers

Answer: Photosynthesis involves the use of energy from sunlight, water and carbon dioxide to produce glucose and oxygen. Cellular respiration uses glucose and oxygen to produce carbon dioxide and water.

Answer:

Phototsynthesis takes water, sunlight, and CO2 and turns it into O2. Cellular Respiration take nutirents and O2 to create ATP.

Watch the video “Teen Stress.” Now, imagine that a friend confides in you that he is going to the doctor because he feels that stress might be affecting his blood pressure. He wants you to help him develop a list of questions to ask the doctor. Come up with five questions for your friend to ask about stress and blood pressure.

Answers

Answer:

questions:

Should I or can I eat salty foods?

Do I have to check my pressure immediately?

Do I have to follow a balanced diet?

Is it good to do physical activity?

Do I have to worry about the signs of eye flickering and headache?

Explanation:

Blood pressure is regulated by endogenous mechanisms, although these sometimes fail and it is necessary to take drugs to reduce high blood pressure, an example of which is beta-blockers.

Blood pressure is also regulated by diets based on low sodium consumption, necessary calories and with great contributions of nutrients since cardiac or cardiovascular health is also essential in the face of possible formation of atheroma plaques.

The increase in blood pressure with the appearance of atheroma plaques is very common, and it is also the two most frequent causes of AMI (acute myocardial infarction)

Answer:

1)How much does blood pressure rise because of stress?

2)Are there techniques that I can use to cope with stress?

3)Do these techniques help to reduce blood pressure?

4)Is exercise helpful in reducing blood pressure caused by stress?

5)Would medication help my condition?

6)Are there any other risk factors for high blood pressure?

Explanation:

Answer from plato.

Which statement describes the role of the organism indicated by the blue arrow in the food web?
A secondary consumer that obtains its energy from the consumption of plants
A primary producer that recycles organic molecules from sunlight
A primary decomposer that recycles organic molecules by breaking them down
A primary consumer that obtains its energy from the consumption of plants

Answers

Answer:

A primary consumer that obtains its energy from the consumption of plants

Explanation:

Organisms that eat the producers are the primary consumers. In this case, the producer is the grass, which is then eaten by the primary consumer, the meadow vole.

Cells that secrete a lot of substances via active transport need a lot of ___in their cytoplasm.
А)endoplasmic reticulum
B)mitochondria
С)golgi apparatus
D)lysosomes
E)chromosomes

Answers

Answer:

The correct answer is

Explanation:

Lysosomes are used in transportation of cytoplasm.

Hope this helps....

Have a nice day!!!!


Pls help the picture above .i will surely mark the first person as the brainliest

Answers

Answer:

Wilting occurs due to excess removal of water from plant body.

Crop rotation.

Explanation:

The main use of blue green algae is that it has the ability of fixing atmospheric nitrogen for the plants. Oil is extracted from Neem leaves which is used as fungicide and pesticide for plants. Turmeric is used as healing of wounds for both plants and animals. It also prevent fungal and bacterial disease in plants. Plants will wilt if not watered because water is removed from the body of plants in order to cool down the inner temperature so due to removal of excess water from plant body it will dry and start wilting. Crop rotation is used in these cropping system. Crop rotation is a practice of growing more than one crop on the same piece of land in a year.

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6. What is the topic of the following passage?College success requires hard work, dedication, and persistence. Specifically, a college studentmust be devoted to working through obstacles and frustrations in order to achieve success.O college successO working through obstacles and frustrations to achieve successdedicationO hard work, dedication, and persistence name all the pairs of angles which are vertical angles , alternate interior angles , alternate exterior angles , co interior angles , co exterior angles , and corresponding angles from the given figure . (co interior - interior angles on the same side of transversal) What guaranteed equal access to public facilities regardless of race?the Thirteenth Amendmentthe Fifteenth Amendmentthe 1875 Civil Rights Actthe Jim Crow laws Question 16 Multiple Choice Worth 2 points)(01.02 MC)Read and choose the option that best completes the sentence.Es mi cumpleaos y tengo la fiesta en la casa de mi amiga Celeste. Me maquillo yla cara en el espejo antes de ir a la fiesta por la noche.me afeitoOme mirome duermoO me pongo What word suggests the presence of something unpleasant. WILL GIVE BRAINLIEST Suppose a 58-turn coil lies in the plane of the page in a uniform magnetic field that is directed into the page. The coil originally has an area of 0.150 m2. It is stretched to have no area in 0.100 s. What is the magnitude (in V) and direction (as seen from above) of the average induced emf if the uniform magnetic field has a strength of 1.10 T? magnitude V direction ---Select--- \ the pain reliever codeine is a weak base with a kb equal to 1.6 x 10^-6. what is the ph of a 0.05 m aqueous codeine solution Let A and B be events. The symmetric difference A?B is defined to be the set of all elements that are in A or B but not both.In logic and engineering, this event is also called the XOR (exclusive or) of A and B.Show that P(AUB) = P(A) + P(B)-2P(AnB), directly using the axioms of probability. You have three resistors: R1 = 1.00 , R2 = 2.00 , and R3 = 4.00 in parallel. Find the equivalent resistance for the combination Which best defines the term matter?Anything that can be seenAnything that takes up space and has massAll the living things on earthO Anything in the atmosphere Light travels at a speed of 2.998*108 m/s. Light takes approximately 3.25 minutes to travel from the Sun to reach a planet. Calculate the distance from the Sun to this planet in meters. Give your answer to 0 decimal places. How are the three economic conditions (Growing, Stable, and Declining) called in the Decision Table?Decision AlternativesStates of NaturePay-offNone of the above How wide is the central diffraction peak on a screen 2.20 mm behind a 0.0328-mmmm-wide slit illuminated by 588-nmnm light? Which pronoun would you use when speaking to a classmate? tuvous what was the 'Great Fear' during the french revolution a sample of an unknown liquid has a volume of 12.0L and a mass of 6g. what is its density? show your work explain how you determined this value brainly According to Marisa when does the movie start?A las nueveA las ochoDespues de las ocho Despues de las nueve List the eight major physical regions of Africa What do these different regions tell youabout Africa? 2. All my sisters are doctors. I am a teacher.(join using whereas)