Chapter 6: Childhood Communicable & Infectious Diseases

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Welcome back to The Deep Dive.

Today we are tackling a beast of a topic, and I don't say that lightly.

We are looking at something that is literally the foundation of pediatric safety.

We're talking about infectious diseases, how to stop them, and how to spot them when they sneak past our defenses.

It is a massive topic, and frankly, it's a high -stakes one.

We aren't just talking about sniffles and scratches here.

We're talking about the primary reasons children are hospitalized and, in some cases, the difference between life and death.

Exactly.

And for our listeners today, specifically those nursing students who might be sweating a bit because their exam is right around the corner, consider this your last minute lecture.

We pulled apart chapter 6 of Wong's Essentials of Pediatric Nursing to give you the ultimate study companion.

We're going to cover infection control, the entire immunization schedule, which I know can be a headache to memorize, and then we're going to walk through the rogue's gallery of diseases.

That's a great way to frame it because safe nursing practice, it really relies on two main pillars here.

First is prevention, you know, keeping the hospital from becoming a breeding ground.

And second is recognition spotting those subtle signs of a disease that can turn fatal in a child very, very quickly.

So let's start at the very beginning, the first line of defense.

The sources gave us a statistic that actually made me pause.

It said about one in 31 hospital patients acquires a healthcare -associated infection

every single day.

That's a wild number.

It is a sobering number, yeah.

And it highlights why we can't just go through the motions.

These infections or HAIs, they happen when there's an interaction between patients, personnel, equipment, and bacteria.

But the key takeaway from the text, and this is the helpful part, is that these are largely preventable.

It comes down to breaking that chain of infection.

Right.

And that brings us to standard precautions.

This is the baseline, right?

This isn't just for the kid with the mysterious rash.

This is for everyone.

Everyone, every single patient, every single time, regardless of their presumed infection status.

Standard precautions, they synthesize the major features of what we used to call universal precautions.

It involves barrier protection, so PPE,

like gloves, goggles, gowns, masks.

The goal is to prevent contamination from blood, body fluids, secretions, excretions, basically everything except sweat.

So sweat is the safe fluid?

Essentially, yes.

If it's not sweat, you should probably assume it can be infectious.

And the text highlighted something I think we all know but maybe get a little lazy about, hand hygiene.

Ah, the classic soap and water versus the gel.

The single most important practice.

It just cannot be overstated.

Whether it's soap and water or alcohol -based products, cleaning your hands is the primary way we stop transmission.

You have to scrub before touching a patient, before a clean procedure, after fluid exposure risk, and after touching the patient's surroundings.

It's the ritual of safety.

Now, there's another part of standard precautions that's really specific to I want to mention.

The sharps container.

Because in an adult ward, you put the needle in the box and walk away.

But PEDS is different.

Very different, yeah.

Figure 6 .1 in the text actually illustrates this setup really well.

The rule is that the rigid, puncture -resistant container must be located near the site of use.

But here's the pediatric twist.

It has to be out of a child's reach.

Because to a toddler, that bright red or yellow box just looks like a toy.

Exactly.

Children are naturally curious.

If they see a colorful box on the wall, they want to touch it.

They want to see what's inside.

As a nurse, you have to ensure that safety equipment doesn't become a hazard itself.

You can't just place it on a low counter.

It needs to be secured and elevated.

That is such a great point.

Okay, so that's standard precautions.

But then we have to level up when we know or suspect something specific is going on.

We enter the world of transmission -based precautions.

The big three.

Correct.

Airborne, droplet, and contact.

You will see these on exams, and you'll absolutely see them in practice.

Understanding the physics behind why we use different precautions helps you remember them.

Let's start with airborne because it's the strictest.

This is for the really tiny stuff, right?

The particles that just kind of hang out in the air.

Exactly.

Airborne droplet nuclei.

We're talking about particles that are smaller than five microns.

Because they're so small, they don't just fall to the ground.

They evaporate and they just float.

They can stay suspended for long periods and travel on air currents even through the ventilation system.

So if you have a patient with measles, varicella, that's chickenpox or tuberculosis, you need airborne precautions.

And that means a special room.

You can't just put them in a regular double room, can you?

No, absolutely not.

You need an airborne infection isolation room or an AIR.

It used to be called a negative pressure room.

The air is handled differently.

It's exhausted directly to the outside or through a special HEPA filter so it doesn't pump that virus out into the hallway or to the patient next door.

And obviously you need better respiratory protection.

A standard surgical mask isn't enough.

You need an N95 respirator.

Okay, so airborne is the floaty stuff.

Less than five microns.

What about droplet?

Think gravity.

Droplet transmission involves larger particles bigger than five microns.

These come from coughing, sneezing, even just talking because they're heavier.

They don't float across the ward.

They obey gravity.

They generally travel only short distances, usually about three feet or less before falling onto surfaces or the floor.

So the radius of danger is a lot smaller.

It is.

This is for things like influenza, pertussis, mumps, rubella and meningitis.

You don't need the special ventilation room because the air itself isn't the problem.

The immediate proximity is.

But you do need a mask when you're within that close range.

Got it.

And finally,

contact precautions.

This one feels like the one pediatric nurses deal with constantly because, well, kids touch everything.

It is huge in pads.

Huge.

This is for direct skin -to -skin contact or indirect contact with objects the patient has touched.

We're talking RSV, C.

diff, rotavirus, MRSA, scabies, you know, the stuff that lives on surfaces.

And the techs had a specific nursing alert here about diapers.

I thought this was fascinating.

The diaper factor.

It's a critical distinction for nurses.

The question is, do you always need a full gown for contact precautions?

The tech says nurses need to exercise judgment.

If you are changing a diaper with

loose or explosive stools, think rotavirus.

Yes.

Wear gloves and a gown.

You do not want that on your uniform.

Explosive stools is a term that only nurses and parents can understand the true horror of precisely.

But if the diaper lining is intact and the stool is contained, gloves alone are often sufficient because the diaper itself is a barrier.

It's all about assessing the risk of contamination.

You don't want to waste PPE, but you never, ever want to expose yourself or other patients.

That's really helpful, practical advice.

Okay.

Moving from keeping the bugs in, let's talk about keeping the bugs out.

Immunizations.

The source material calls this one of the most dramatic advances in pediatrics.

It absolutely is.

I mean, we've seen infectious diseases decline massively in the 20th and 21st centuries.

Polio is gone from the US.

Smallpox is gone globally,

but it requires adherence to the schedule.

Before we hit the schedule, which is a bit of an alphabet soup,

we should probably clarify some terms.

Herd immunity versus cocooning.

Right.

So herd immunity is the big picture strategy.

It's when the majority of the population is vaccinated.

So the disease has nowhere to go.

It just hits a dead end because everyone is immune.

This protects the few people who can't be vaccinated.

Those undergoing chemotherapy or with specific immune disorders.

In cocooning, that's different.

Catooning is much more targeted.

It's a strategy we use specifically for pertussis or whooping cough.

Oh, this is for the newborns, right?

Yes.

Infants are so vulnerable to pertussis, but they can't be fully vaccinated immediately.

It takes time for the series to work.

So we cocoon them by vaccinating everyone around them, mom, dad, grandparents, the healthcare workers.

If everyone close to the baby is immune, the virus just can't get to the baby.

The baby is safe inside this cocoon of vaccinated adults.

I love that visual.

A cocoon of safety.

Okay.

Let's brave the schedule.

I'm going to throw vaccines at you and you give us the last minute lecture highlights.

What do we need to know?

Let's start with the very first one.

Hepatitis B.

Hep B is the welcome to the world vaccine.

Ideally, it is given at birth before hospital discharge.

It's an intramuscular injection.

Okay.

Is there ever a reason to wait?

Well, only if the infant is a preemie weighing less than 2000 grams, that's about 4 .4 pounds.

And the mother is hepatitis B surface antigen negative.

In that specific case, we might delay the first dose to one month of chronologic age because their immune response just isn't optimum yet.

But if mom is positive, that baby gets the vaccine and the immunoglobulin HBIG within 12 hours of birth, regardless of weight.

We don't mess around with hep B exposure.

Got it.

Okay.

Moving up hepatitis A.

That one starts at one year old.

It's a two dose series spaced at least six months apart.

Hep A is spread fecal oral.

So once kids start moving around and putting things in their mouths, that protection really matters.

Now for the confusing acronyms, DTAP versus Tdap.

These letters always trip students up.

This is a classic exam question.

It's all about age and the amount of diphtheria toxoid.

DTAP -P with a capital D and a capital P is the primary series for children younger than

It has higher concentrations to build that initial immunity.

And Tdap.

Once they hit seven years old, or for that adolescent booster at 11 or 12, we switch to Tdap capital T, little D, little P.

The little D indicates a reduced dose of diphtheria toxoid and little P is reduced pertussis, which is just what you need for a booster.

So little kids get the big D, bigger kids get the little D.

That's a good way to remember it.

Yes.

And speaking of pertussis, the text really emphasizes that Tdap is recommended for between 27 and 36 weeks gestation during each pregnancy.

This passes antibodies to the fetus.

It's part of that cocooning strategy we just talked about.

What about polio?

I know we used to have the oral drops.

I remember seeing photos of kids getting sugar cubes.

We did.

That was the OPV, but we stopped using it in the US back in 2000.

Now we only use IPV and activated polio vaccine, which is an injection.

The reason is safety.

The oral vaccine was a live virus and it carried a very, rare risk of actually causing vaccine -associated paralytic polio.

Since wild polio was eliminated in the US, that risk was no longer acceptable.

The injection eliminates that risk entirely.

Safety first.

Makes sense.

Okay.

The big one for toddlers,

MMR, measles, mumps, rubella.

This is a live virus vaccine.

That's the key takeaway.

Because it's live, we don't give it until 12 to 15 months.

Why wait?

We have to wait for the maternal antibodies, the ones mom passed to the baby through the center to fade away.

If we give it too early, mom's antibodies would just attack the vaccine virus and kill it before the baby's own immune system could learn from it.

It would just render the vaccine ineffective.

And because it's live, there are some pretty strict contraindications.

Right.

Pregnancy and severe immunodeficiency.

You do not give a live virus to someone whose immune system is compromised or to a pregnant woman due to theoretical risks to the fetus.

Okay.

We also have varicella or chicken pox.

Also a live virus.

Also starts at 12, 15 months.

It's often given with MMR as a combination shot called MMRV, but you should be aware the text notes a slightly higher risk of febrile seizures with the combo shot in that first dose.

But generally it's very safe.

It's two doses, 12, 15 months, and then again at four, six years right before kindergarten.

Let's run through a few others quickly.

Hebb.

Haemophilus influenza type B.

This used to be a leading cause of bacterial meningitis and epiglottitis, that terrifying airway swelling where the child just can't breathe.

The vaccine has drastically reduced those cases.

PCV13.

Pneumococcal conjugate.

That protects against streptococcus pneumonia, which causes ear infections or otitis media, pneumonia, and sepsis.

And rotavirus.

That's the oral one.

It targets severe diarrhea.

It's really critical for preventing dehydration in infants.

But you have to remember there's an age limit.

You generally don't start it after 15 weeks of age.

And finally, HPV.

Prevention of cervical and other cancers.

That starts at 11 or 12 years old, but it can be given as early as nine.

It's unique because it is explicitly a cancer -preventing vaccine.

That is quite the list.

But knowing the why behind them really helps.

Now whenever we talk vaccines, we have to talk about reactions.

Parents are terrified of reactions.

And that's understandable.

But as nurses, we need to separate the minor reactions from the emergencies.

Most reactions are very minor.

Local tenderness at the injection site.

Maybe a low -grade fever, some fussiness.

That's just the immune system doing its work.

It's building the army.

But the Tex has a drug alert box specifically for anaphylaxis.

Yes.

This is the emergency response.

Anaphylaxis is rare, but you must be ready for it.

If a child has anaphylactic reaction hives, trouble breathing, swelling of the lips or tongue, hypotension, you need epinephrine.

And you need to know the dose by heart.

Okay.

Hit us with the numbers.

For a child weighing 15 to 30 kilograms, it's 0 .15 milligrams.

That's often the EpiPen Junior.

If they're over 30 kilograms, it's 0 .3 milligrams, the regular EpiPen.

You administer that intramuscularly immediately.

You do not wait.

There are also so many myths about when not to vaccinate.

The Tex calls out some specific non -contraindications.

This is vital for education because parents will look for any reason to delay.

A mild cold is not a reason to skip a vaccine.

A low -grade fever is not a contraindication.

Breastfeeding is not a contraindication.

A family history of seizures is not a contraindication.

And here's a big one that has changed.

Egg allergies.

Yes.

I feel like people still think an egg allergy means no flu shot.

That's completely outdated.

The AAP data shows that an egg allergy is generally not a contraindication for MMR or influenza anymore.

The amount of egg protein is negligible.

Children with egg allergies should receive these vaccines just like anyone else.

That is really good to be clear on.

Before we give the shot, though, there's a legal requirement, right?

The VIS.

The Vaccine Information Statement.

Federal law requires you to give this to the parent before the shot, not after.

It details all the risks and benefits.

And you have to document that you gave it, along with the manufacturer, the lot number, the site, and the date of the vaccine.

Okay, let's talk about the actual poke.

Section 4.

Administration.

The text mentions atraumatic care,

which I love.

It basically means let's not traumatize the child.

It's so, so important.

Pain management isn't just a nice -to -have.

It is essential nursing care.

If we traumatize a child now, they will fear healthcare for the rest of their lives.

So first off, where are we sticking the needle?

Geography matters.

For infants and toddlers who aren't walking well yet, the vastus lateralis, that big thigh muscle, is the gold standard.

It's the biggest, safest muscle they have.

Do not use the dorsigluteal, the buttock, because of the risk of hitting the sciatic nerve.

And for older kids?

For older children and adolescents, if the muscle is developed, you can use the deltoid in the arm.

Usually that's fine after age 3 if there's enough muscle mass.

And the needle length.

This seemed like a small detail, but the text made a big deal out of it.

Because it causes reactions if you get it wrong.

If the needle is too short, you inject the vaccine into the fat, the subcutaneous tissue, instead of a muscle.

That causes lumps, redness, and significant pain.

For newborns, you need a 58 -inch needle.

For infants and toddlers, usually a 1 -inch needle is required to get deep enough into that muscle.

Okay, so use a long enough needle.

What else can we do to reduce pain?

Well, there are topical anesthetics like EMLA cream, but remember, that takes an hour to work.

You have to plan ahead.

LMX4 takes about 30 minutes.

If you don't have time for that, you can use a vapor coolant spray immediately before.

It just freezes the skin for a few seconds.

And for the babies, what's best for them?

Breastfeeding.

Breastfeeding during the injection is a potent analgesic.

It comforts, it distracts, and the sucrose in the milk helps.

And here's a practice change for some old school nurses.

Do not aspirate.

Don't pull back on the plunger.

No.

There are no large blood vessels in the recommended sites.

Aspirating just hurts more because you're wiggling the needle around, and it isn't necessary.

Just inject, and if you have multiple shots, give the most painful one last so they aren't screaming for the rest of them.

That is just compassionate care.

Okay, we have covered prevention.

Now we have to go into the scary part.

When prevention fails,

the rogue's gallery of communicable diseases,

the text provides these clinical pictures that are just perfect for exam questions.

This is where you have to be a detective.

You are looking for the hallmark science.

Let's start with Varshella, chickenpox.

The text describes the rash as centripetal.

What does that mean?

It means it concentrates on the center of the body, so it starts on the trunk and then spreads out to the face and limbs.

But the key diagnostic clue is the progression.

You will see a macule, which is a flat spot, then a papule, a raised bump, then a mesical, a fluid -filled blister, and then a crust.

And the hallmark of chickenpox is that you see all stages present at once.

That is a great visual, and I hear it's bitchy.

Insanely ishy.

So nursing care involves keeping them cool, trimming their fingernails to prevent a secondary infection from scratching.

You don't want staph getting in there.

And very important, no aspirin.

Why no aspirin?

Aspirin used during a viral illness like Varshella or the flu carries a significant risk of Ray syndrome, which is a life -threatening condition that affects the liver and the brain.

You use acetaminophen or ibuprofen instead.

Next up, diphtheria.

This one sounds almost old -fashioned, but it's so dangerous.

It is.

It's caused by a toxin.

The sign to look for is the bull's neck, which is massive lymph node swelling, and a white or gray membrane in the throat.

The danger here is airway obstruction.

That membrane can physically choke a child.

What about fist disease, erythema infectiosum?

This is caused by human parvovirus B19.

It has a three -stage rash, the classic sinus stage one, the slapped cheek appearance, the cheeks get bright red, then later you get this lacy maculopapular rash on the body.

And is this the one that's dangerous for pregnant women?

Yes.

It's usually pretty mild for the child, but if a pregnant woman contracts it, it can cause fetal high drops, which is severe anemia and fluid buildup in the fetus, and can lead to fetal death.

So pregnant nurses should not care for these patients.

Then there is rosiola, xanthum subitum.

This one always tricks parents.

It's the fever rash fake -out.

The child has this persistently high fever like 103 or 104 degrees for three to seven days, but surprisingly they act relatively okay.

Then the fever breaks, it drops to normal, and boom, the rash appears.

So the rash comes after the fever.

Exactly.

Unlike measles, where they happen together, the rash starts on the trunk and then spreads to the neck and face.

Speaking of measles, rubiola.

This is the big bad one.

Measles makes a child very, very sick.

High fever, cough, runny nose, conjunctivitis.

The diagnostic sign, the one you have to know, is couplic spots.

These are small red spots with blue -white centers inside the mouth on the buccal mucosa.

They show up about two days before the body rash appears.

And the text mentioned a specific supplement for measles.

Vitamin A.

Supplementing vitamin A has been proven to reduce morbidity and mortality in measles cases.

It supports the epithelial cells.

Also, these kids have photophobia light, really hurts their eyes, so you need to keep the lights dim in the room.

Mumps.

Think perititis.

Swollen salivary glands right along the jawline.

They look like little chipmunks.

The complication we worry about here, especially in post pubertal males, is orchitis swelling of the testicles.

It can be very painful and in rare cases affect fertility.

It can also cause deafness.

And pertussis.

We mentioned the cocooning, but what does the disease actually look like?

Whooping cough.

It's a bacterial infection.

The cough is paroxysmal, meaning it comes in these bursts.

Cough, cough, cough, cough, until they run out of air, and it's followed by this high -pitched whoop on inspiration as they desperately gasp for breath.

But the text had a warning about infants.

Yes, this is critical.

Infants might not whoop.

They don't have the muscle strength to make that sound.

Instead, they might just have apnea.

They stop breathing.

And that is terrifying and requires very close monitoring, suction, and humidity.

Okay, let's do a few more quick hits.

Wubella.

German measles.

It's much milder than regular measles.

The rash is pinkish red, starts on the face, and spreads down.

It's gone in three days.

But again, the major danger is the teratogenic effect.

Meaning it harms the fetus.

Yes.

If a pregnant woman gets rubella, especially in the first trimester, it can cause devastating birth defects, deafness, cataracts, heart defects.

You have to isolate these kids from pregnant women.

And scarlet fever.

This is caused by group A beta -hemolytic strap, the same bug that causes strep throat.

You need to look for the strawberry tongue.

It's white at first, then it peels to red, and the rash feels like sandpaper.

You can often feel it better than you can see it.

And the treatment for that?

Penicillin.

It's a bacterial infection.

And a practical tip.

Throw away their toothbrush.

You don't want them re -infecting themselves after they start antibiotics.

That is a solid rundown.

Now, let's zoom in on some specific conditions and complications the chapter covers.

Managing the gross stuff.

Let's start with conjunctivitis.

Pink eye.

A classic.

It can be bacterial, viral, allergic, or from a foreign body.

Bacterial is the one with that crusty, purulent drainage that glues the eye shut in the morning.

Viral is much more watery.

What's the nursing trick for cleaning the eye?

You always wipe from the inner canvas, the corner near the nose, downward and outward.

You want to wipe away from the other eye so you don't spread the infection to the healthy eye.

And warm compresses help remove those crusts.

And then there's scomatitis.

Mouth sores.

Yeah, these can be aphthous ulcers, which are canker sores or herpetic, from HSV fever blisters.

They are incredibly painful.

The nursing priority here is hydration.

The child will not want to drink because it hurts so much.

So pain relief is absolutely key.

Yes.

The text mentions magic mouthwash.

It's often a mix of diphenhydramine, so benadryl and malox.

It coats the sores and numbs them a bit.

Also, use a straw.

It helps bypass the sores.

And for God's sake, don't give them orange juice.

Oh, never.

No citrus, no salty foods.

Bland and cool is the way to go.

And one note on herpetic stomatitis.

What is herpetic Whitlow?

Yes.

If a nurse with a cut on their finger touches the herpes lesions in a child's mouth without gloves, the virus can actually infect the finger.

It's incredibly painful.

It's exactly why we wear gloves for oral care.

OK, brace yourself.

We are entering the parasite zone.

I'm ready.

GRD asses.

This is a protozoan.

It forms these little cysts.

It's very common in daycares because it's spread fecal oral.

Diapers again?

Always diapers.

The cysts can survive in water, two lakes, pools, even chlorinated water sometimes.

Symptoms are diarrhea, vomiting, and failure to thrive.

We treat it with metronidazole or tinidazole.

And a prevention is, you guessed it, vigilant hand hygiene.

And finally, the one that makes every parent shudder.

Pinworms.

Enterobiasis.

The most common helminth infection in the US.

The worms live in the cecum.

The symptom is intense itching around the anus, and it's usually worse at night.

And the diagnosis method is distinct.

It's the tape test.

And it is exactly what it sounds like.

You take a piece of clear tape, not the frosted kind, loop it over a tongue depressor, sticky side out.

And you press it against the child's perianal area.

When?

When do you do this?

Immediately upon waking up.

Before they poop, before they bathe.

Why?

Because the female worms migrate out of the anus at night to lay their eggs on the skin.

You're trying to catch those eggs on the tape.

That is a morning routine nobody wants.

And if one kid has it.

You treat the whole family.

The eggs are sticky and light.

They float in the dust.

They get on sheets, doorknobs, toys.

You treat everyone.

Wash all the linens in hot water.

And then you repeat the dose in two weeks to catch any eggs that hatched after the first dose.

Incredible.

Before we wrap up, the text touches on a few emerging threats or other issues.

Zika, COVID,

and bedbugs.

A quick roundup.

Zika is mosquito -borne and transplacental.

The huge risk there is microcephaly in the fetus.

Prevention is all about mosquito -controlled clothing repellent.

COVID -19.

The text notes that presentation in children varies widely.

From asymptomatic to critical.

But it is often mild compared to adults.

And bedbugs.

They aren't actually disease vectors.

They don't spread sickness like mosquitoes do.

But they cause itching, distress, and secondary infection from scratching.

And they are notoriously hard to kill.

You really need professional extermination.

Wait.

We have covered a massive amount of ground.

From the microscopic airborne particles of measles to the tape test for pinworms.

We really have.

So let's try to boil this down.

If you're that nursing student walking into the exam, or just a listener trying to keep a kid safe,

what are the core takeaways?

I'd say it comes down to three rules.

First, identification.

Know your rashes.

Know the difference between the slapped cheek and the sandpaper rash.

Know the difference between a whoop and a bark.

Recognition is the first step to treatment.

Second, prevention.

Understand the transmission routes.

Know when you need an N95 versus a surgical mask.

And champion those immunizations.

Understand the schedule and the why behind it.

Why we wait for MMR.

Why we cocoon for pertussis.

And third, education.

Parents are your partners.

Teach them how to manage a fever.

How to stop the itching.

Why they need to finish the antibiotics.

And why, please, they shouldn't use aspirin for chickenpox.

And the diaper factor.

And the diaper factor.

Judgment is absolutely key.

This has been a true deep dive into chapter six.

It's so clear that communicable diseases haven't just disappeared.

They are controlled.

And often, the nurse is the wall keeping them controlled.

Absolutely.

The nurse is the barrier between a single case and an outbreak.

A powerful thought to end on.

Thank you to our expert for guiding us through the rashy, itchy, and vital world of pediatric infectious diseases.

And to our listeners, good luck on the exam.

You've got this.

You've got this.

We'll see you in the next deep dive.