Pertussis Symptoms and Conditions

Recognize early Pertussis symptoms with expert pediatric evaluation and rapid diagnosis at Liv Hospital.

Liv Hospital specialists help identify pertussis symptoms early and provide advanced care to protect infants and children.

We're Here to Help.
Get in Touch.

Send us all your questions or requests, and our expert team will assist you.

Pertussis Symptoms and Conditions

What Is the Clinical Course of Pertussis?

The clinical course of Pertussis is unique among respiratory infections due to its protracted nature and the specific way the cough evolves.
Because the bacteria paralyze the cilia (the cleaning mechanism of the lungs), the body must use violent physical force the cough to clear accumulating debris.
This results in a disease that typically lasts for 10 to 12 weeks, earning it the historical name “the 100-day cough.”
Symptoms are categorized into three distinct clinical stages. Recognizing the transition between these stages is vital for both treatment and infection control.

The Catarrhal Stage (Days 1–14)

The initial stage of pertussis is deceptive because it mimics a common upper respiratory infection.

Symptoms: A mild occasional cough, runny nose (rhinorrhea), sneezing, and a low-grade fever (usually below 38°C).
High Infectivity: During this stage, the bacterial load is at its highest. The person is extremely contagious, but because the symptoms are so mild, they often continue to go to school or work, spreading the infection.

Transition to the Paroxysmal Stage (Weeks 2–8)

As the toxins damage the airway lining, the cough changes from a mild annoyance to a violent, uncontrollable physical event. This is the hallmark of the disease.

The Paroxysm: A “burst” of numerous, rapid coughs where the patient cannot inhale between coughs.

The "Whoop" (Inspiratory Gasp)

At the end of a coughing fit, the patient is desperate for air.

Mechanism: As they take a deep, rapid breath in through a partially closed and swollen airway, it produces a high-pitched “whooping” sound.
Absence in Adults: Many adults and teens do not “whoop” because their airways are larger; they may simply have a persistent, hacking cough.

Post-Tussive Emesis (Vomiting After Coughing)

A very specific clinical sign of pertussis is vomiting immediately following a coughing fit.

Cause: The intensity of the cough triggers the gag reflex. In a child with a prolonged cough, the presence of vomiting after coughing is a strong indicator that the cause is Boğmaca (Pertussis).

Cyanosis and Turning Blue

During an intense coughing fit, the patient may be unable to get any oxygen into their lungs for several seconds.

Appearance: The face may turn red, purple, or blue (cyanosis). The eyes may bulge, and the tongue may protrude. This is a terrifying experience for both the child and the parent.

Apnea in Infants (The Silent Symptom)

In newborns and infants under 6 months, the “classic” cough may not appear at all.

The Danger: Instead of coughing, the baby may simply stop breathing for several seconds (apnea). They may turn pale or blue and become limp. This is often the only sign of pertussis in very young babies and is a life-threatening emergency.

Exhaustion and Fatigue

The physical toll of coughing fits which can occur 15 to 50 times a day is immense. Patients often look completely exhausted between fits but may appear relatively “normal” and healthy when not actively coughing.

Subconjunctival Hemorrhage (Broken Eye Vessels)

The pressure generated by a pertussis coughing fit is so intense that it can burst the small blood vessels in the whites of the eyes.
This leads to bright red patches in the eye, which, while harmless themselves, indicate the severity of the cough.

Thick, Tenacious Mucus

The cough produces a very thick, stringy, clear mucus. It is often described as “glass-like.”
Because it is so sticky, it is very difficult for the child to spit out or swallow, which contributes to the feeling of choking during a fit.

Pertussis Symptoms and Conditions

We're Here to Help. Get in Touch.

Book a Free Certified Online Doctor Consultation

Related Doctors

30 Years of Excellence

Trusted Worldwide

With patients from across the globe, we bring over three decades of medical

Reviews from 9,651

4,9

Worth a look

Was this article helpful?

Was this article helpful?

We're Here to Help. Get in Touch.

FREQUENTLY ASKED QUESTIONS

RELATED VIDEOS

RELATED NEWS

URI Symptoms: A Guide to Telling Viral vs. Bacterial

Ear Infection Symptoms: What Not to Do for Relief

7 Powerful Reasons Why Ear Tubes Are the Most Common Toddler Surgery

Ear Infection: Can Children Heal Without Antibiotics?

Ear Infection Symptoms: How Toddlers Behave When Sick

Tonsil Regrowth: Rare but Possible Facts

ABOUT LIV

LIV ONLINE

Let's Talk on WhatsApp

How helpful was it?

We're Here to Help.
Get in Touch.

Book a Free Certified Online
Doctor Consultation

30 Years of Excellence

We're Here to Help.
Get in Touch.