Use the CDC website to examine giardiasis surveillance data. Notice the variety of transmission modes that have been identified. The CDC notes several characteristics that make drinking and recreational water and person-to-person contact ideal modes of transmission. Which of the following contributes to the ease of transmission via these modes?
1) Resistance to antibiotics
2) Low infectious dose
3) Survival in environment outside host
4) Resistance to chlorine treatment

Answers

Answer 1

Answer: The option that contributes to the ease of transmission is 2 ( Low infectious dose).

Explanation:

Giardiasis is an infection that affects the intestine which is caused by a parasite known as giardia intestinalis. The giardiasis surveillance data recorded by the CDC, was done to educate public health practitioners and health-care providers about the scope and magnitude of giardiasis. It also provided different route through which the parasite can be transmitted to uninfected individual and these include:

--> Waterborne transmission: In this route of transmission, an individual becomes infected when they drink contaminated water from recreational water(pools) or streams.

--> Foodborne transmission: In this route of transmission, an individual becomes infected when they eat contaminated uncooked foods or foods that become contaminated after cooking.

--> Person to person: in this route of transmission, a healthy individual becomes infected through ianal sex practice.

The LOW INFECTIOUS DOSE of the parasite contributes to the ease at which transmission occurs through the above mentioned routes. The parasite has a two stage life cycle, the trophozoite and cyst. Ingestion of as few as 10 cysts can lead to giardiasis Infection.


Related Questions

What is meant by signal transduction and what is its effect on the process of egg activation?

Answers

Answer:

The process by which a cell responds to substances outside the cell through signaling molecules found on the surface of and inside the cell. ... Signal transduction is important for cells to grow and work normally. Cells that have abnormal signaling molecules may become cancer cells. Also called cell signaling.

Egg activation, whether initiated by or independent of fertilization, induces a rise in intracellular calcium. This calcium increase often manifests as a signaling wave that traverses the egg and releases it from meiotic arrest and metabolic dormancy.

What is the function for common carotid arteries for frogs?​

Answers

Answer:

Carotid arteries also branch off the aortic arches and supply the head region. Veins bring blood to the left and right atria. Both atria then empty into the single ventricle. Blood from the ventricle thus enters either the pulmonary or body circulation.

Explanation:

Did I bleed through my pants

Answers

Answer:

its possible

Explanation:

6. Where does the most erosion take place in a meandering stream?
Hint: it is also where the water moves the fastest
1)inside of the bend (curve)
2)outside of the bend (curve)
3)the middle

Answers

I think it’s 1) outside of the bend


Which of the following statements best explains why the energy pyramid is narrowest at the top?

A The organisms at the top of the pyramid have the largest population sizes
B The organisms at the top of the pyramid receive only a small fraction of the energy that originally enters the system,
The organisms at the top of the pyramid are the most efficient feeders.
The organisms at the top of the pyramid need only a small amount of energy for their metabolism

Answers

Answer:

The answer is B

Explanation:

It is B because of how about 10% of the energy is lost each time the energy is passed to the next organism.

PLS HURRY!!!!!
If two parents each have one dominant allele and one recessive allele for curly hair (Cc), what is the probability they will create an offspring with two recessive alleles? Draw a Punnett square to explain your answer.

Answers

i drew the punet square i hooe that helps

Explanation:

the answer is .25 or 1/4

A plane is a flat surface that has no ___ and extends forever.

Answers

Answer:

thickness

Explanation:

Planes have no thickness

Answer:

A plane is a flat surface that has no ending and extends forever.

please HELP IM TIRED OF THOSE BOTS
help me out

Below is a photo of cells from a particular kind of organism.

Answers

Answer:

C

Explanation:

There are several cells, therefore it is multicellular. They also have nuclei, meaning that this organism is a multicellular eukaryote.

Which 2 of the Earth's regions contain the most carbon?

Answers

Answer:

The amount of carbon stored in a particular system is called a “stock” or a “pool”. The Earth's largest carbon stock is found within the continental crusts and upper mantle of the Earth, a large portion of which is sedimentary rock formed over millions of years (2).

Blond hair in Solomon Islanders is an autosomal recessive trait. Approximately 9% of the population has blond hair. a.If Hardy-Weinberg conditions were met for this locus, what would be the frequency of the allele causing blond hair color in this population

Answers

Answer:

the frequency of the allele causing blond hair color, f(b) = q = 0.3

Explanation:

Due to technical problems, you will find the complete explanation in the attached files.

Peridotite, quartz, and nickel are some of the most common compounds that make up Earth. Peridotite has a density of approximately 3.4 g/cm3; quartz has a density of approximately 2.65 g/cm3; and nickel has a density of approximately 8.9 g/cm3. Based on this information, which compound do you think is most common near Earth’s surface, and which do you think is most common near Earth’s core?

Answers

Answer: Quartz is probably most common at the surface, and nickel is probably most common near the core.

Explanation: sample answer on edmentum

Earth is made up of three main layers and we human beings live on the solid outer layer called the crust.

Which alloy is present in the core of earth?

The outer core is about 1,400 miles thick, and made up of mostly of a combination (called an alloy) of iron and nickel, along with small amounts of other dense elements like gold, platinum, and uranium. Quartz is probably most common at the surface.

These metals can be found on the surface of earth in solid form. In the outer core, metal present in a very hot liquid form between 7,000-9,000º F.

For more information regarding earth core, visit:

https://brainly.com/question/20887392

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Explain how digestive organs depend upon each other to provide nutrients to the body.

Answers

Answer:

The function of an organ system depends on the integrated activity of its organs. For instance, digestive system organs cooperate to process food. The survival of the organism depends on the integrated activity of all the organ systems, often coordinated by the endocrine and nervous systems.

Explanation:

The snake that ate the frog in this food chain would be called a ?

Answers

i said sum but nvm....

Which process of alimentary canal that remove undigested food from body? *
3 points
A. Egestion
B. Ingestion
C. Assimilation

Answers

the answer is C. assimilation

Which of the following examples is a non-renewable source of energy A.Wind B.hydroelectric C.Nuclear power D.Wood

Answers

Answer:

An example of non-renewable source of energy would be C) Nuclear power.

Explanation:

Renewable resources include biomass energy (such as ethanol), hydropower, geothermal power, wind energy, and solar energy. Biomass refers to organic material from plants or animals, whilst Nonrenewable energy resources include coal, natural gas, oil, and nuclear energy. Once these resources are used up, they cannot be replaced, which is a major problem for humanity as we are currently dependent on them to supply most of our energy needs.

I hope this helps! Have a great day! -Olli :]

Nuclear power is a non-renewable source of energy. It is derived from the energy released by nuclear reactions, which are fueled by radioactive materials such as uranium or plutonium. Therefore, option (C) is correct.

What is nuclear power?

Nuclear power is a form of energy that is generated from nuclear reactions. It involves the use of radioactive materials, such as uranium or plutonium, which undergo nuclear fission in a reactor to produce heat. This heat is then used to generate steam, which drives a turbine and produces electricity. Nuclear power plants are used to generate electricity for homes and businesses, and they are typically very efficient and reliable sources of energy.

However, nuclear power also has potential drawbacks, including the risk of radiation leaks or accidents, the long-term storage of radioactive waste, and concerns over nuclear proliferation. Despite these concerns, nuclear power remains an important component of the world's energy mix, and ongoing research is focused on developing safer and more sustainable nuclear technologies.

Learn more about nuclear power, here:

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What is the general shape of the graph?
Cell division gizmo

Answers

Answer and Explanation:

The image attached below presents the general shape of a graph showing cell division. This is because this graph shows the diversification of the amount of DNA in a cell in relation to the time and phases of cell division.

Through the graph shown below, we can see that before cell division, the cell passes through the G1 phase, where it has a specific amount of DNA for a cell in that cell stage. During phase S there is a progressive increase in the amount of DNA, and at the end of that phase, the cell will have twice as much DNA as it had before. The end of phase S, starts phase G2, where the amount of DNA is stabilized, until cell division occurs (represented in the graph by the letter M). Cell division causes a progressive decrease in the amount of DNA, which returns to the amount shown in phase G1.

Answer:

It is a straight line

Explanation:

Because the line is going up or down but is still a straight line

Plants are an important part of an ecosystem
Which role do plants play in the flow of energy within an ecosystem?
A producers
B) decomposers
consumers
D herbivores

Answers

plants are producers
Answer: A) producers

Colorblindness is sex recessive A female who is heterozygous for -green color blindness normal male. What is the chance the boys wil be colorblind Do the Punnett Square!

Answers

Answer:

The correct answer is - 50% of boys will be colorblind.

Explanation:

Colorblindness is an X-linked recessive disorder which means it will affect a female if present in both X chromosomes whereas in males there is only one X chromosome so even one chromosome with the mutated gene will cause the disorder.

Cross: heterozygous female (XHXh) with a normal man (XHY)

gametes: XH Xh and XH Y

Punnett:

          XH       Y

XH    XHXH   XHY

Xh    XHXh    XhY

male color blind ratio: 1/2 = 50%


7 grade science pls help

Answers

The correct answer is D

Answer:

A method farmers use to raise strong animals and crops

Explanation:

Please don't give me a wedsite

Answers

Answer:

a i think

Explanation:

los puntos estan abajo

Answers

Answer:

No se ve nada

Explanation:

Nomas se ve un downoald link pero puede se estaffa

I don’t see the picture

No veo la foto :^

proteins are _____substances​

Answers

Answer:

Proteins are complex substances

Explanation:

Proteins are basic components of all living cells and are therefore among the principal substances that make up the body. In addition to being necessary for the growth and repair of the body's tissues, proteins provide energy and act as enzymes that control chemical reactions in the cell.

#CarryOnLearning#BrainliestAnswer

BIOL 103
Laboratory Exercise 1
Metric Measurements
Class Activity
Name: ___________________________________ Section: ________________
1. Working with a partner, use the provided tape to obtain the following
measurements. Then complete the table below:
Dimension Decimeter
(dm)
Centimeter
(cm)
Millimeter
(mm)
Micrometer
(µm)
Height
Inseam
Total Arm Spread
Chest
Waist
Biceps
Wrist
Head
Middle Finger
Middle Toe
What is the ratio of your middle finger to your middle toe? ____________
What is the ratio of your height to your inseam? ____________
2. Answer the following Questions:
a. Bobby weighs 175 pounds. What is his weight in kilograms? ____________
b. The Taipei 101 building in Taiwan is 509 m tall and the Petronas Tower I
building in Kuala Lumpur, Malaysia is 1483 feet tall. Which is the taller
building? ____________
c. How many deciliters are in 10 liters? _____________________
d. Julie’s daughter has a temperature of 101◦
F. Convert this temperature to degree
Celsius. __________________
e. At the 2012 Summer Olympics in London, Usain Bolt (Jamaica) ran the 100 m
dash in 9.63 seconds. Convert this to (i) milliseconds ___________________
and (ii) minutes __________________
f. You have been asked to transfer 5 milliliters (mL) of a solution from a beaker
containing 10 mL to a test-tube using a 200 µL pipette. Assuming that you take
the maximum volume that this pipette allows, how many transfers would you
make? _______________ transfer

Answers

Answer:

175 pounds equals 79.37kg

Taipei 101 is taller, 1669.96 feet

100 deciliters

38.3 degrees celsius

9630 milliseconds

Explanation:

how is hydro electricity produced step by step explanation ​

Answers

Answer:

ydropower, electricity produced from generators driven by turbines that convert the potential energy of falling or fast-flowing water into mechanical energy

Explanation:

In the generation of hydroelectric power, water is collected or stored at a higher elevation and led downward through large pipes or tunnels (penstocks) to a lower elevation; the difference in these two elevations is known as the head. At the end of its passage down the pipes, the falling water causes turbines to rotate. The turbines in turn drive generators, which convert the turbines’ mechanical energy into electricity. Transformers are then used to convert the alternating voltage suitable for the generators to a higher voltage suitable for long-distance transmission. The structure that houses the turbines and generators, and into which the pipes or penstocks feed, is called the powerhouse.

Write the steps in order that happen in photosynthesis

Answers

Answer:

Step 1-Light Dependent. CO2 and H2O enter the leaf.

Step 2- Light Dependent. Light hits the pigment in the membrane of a thylakoid, splitting the H2O into O2.

Step 3- Light Dependent. The electrons move down to enzymes.

Step 4-Light Dependent. ...

Step 5-Light independent. ...

Step 6-Light independent. ...

calvin cycle.

Explanation:

The mining method used to sift through mineral in riverbed deposits is ______________

Answers

Answer: placer mining

Explanation: g.o.o.g.l.e is a very great thing

calz 2)
pistillo (2)
corola petalos 2) antara (2)
bues 2
Formado por hojas verdes
2.- Las hojas del cal se llaman
3- Formada por hojas de colores.
Las hojas de la corola son los
དུག་ Sirve para proteger el capuillo
6.- Atrae a los insectos
El organo masculino es
El estambre termina en un saquito o
El órgano femenino es
10.- Lo que contiene los óvulos
11.- Están dentro del ovano
12.- Está lleno de polen
13.- Hay varios
14.- Hay uno solo
sepolos
Estamtrs
ovulos
Lee con atención los siguientes conceptos y subraya la opción correcta sobre la reproducción
de las plantas y fecundación de la flor.
Los granos del polen están en la
antera
polen insectos fecundación Ovulo estigma
2.- Al abrirse la antera sale el
antera polen insectos
fecundación
ovulo
estigma
3.- Parte del polen cae en
antera polen
insectos
fecundación
ovulo
estigma
4.- Transportan el polen los
antera polen insectos fecundación
Ovulo
estigma
ovulo
estigma
5.- El polen se une con el
antera polen insectos fecundación
fecundación
ovulo
6.- Unión del polen y óvulo
antera
polen insectos
estigma
ovulo
estigma
7. Buscan el néctar los
antera polen
insectos fecundación




básicamente es la página de un libro de biología del 2014

es la página 82
alguien porfavor ayúdeme​

Answers

Answer:

7. Busca el néctar los antera polen insectos fecundacion

please explain answers

Answers

Please explain answers

Why you think the human population has been to grow so much in the last 500 years?​

Answers

Answer:

Because of how many advancments we have made in that time

Explanation:

Explanation:

due to decrease in death rate and increase in birth rate because of new facilities

Which of the following is an example of the endocrine system maintaining homeostasis? (3 points)
Detecting a pain stimulus and sending a signal to the spinal cord to perform an automatic response
Discharging an excessive amount of hormones in the blood and not sending a signal to stop production
Sending a message to the pituitary gland to start producing a hormone when the levels in the body are too low
Using sense organs to get information about the outside world and direct an appropriate body response release

Answers

Answer:

C. Sending a message to the pituitary gland to start producing a hormone when the levels in the body are too low

Explanation:

It's not A, because that's the nervous system, not endocrine.

It's not B, because homeostasis = balance, and not stopping production isn't balance

It's not D, because that's the nervous system again.

The endocrine system governs hormones.

Answer:

the answer is C hope this helped

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