Omphalitis (Umbilical Cord Infection)

What omphalitis is

After birth, the umbilical cord is clamped and cut, leaving a stump about 2 to 3 cm long. It dries, darkens and normally falls off in 5 to 15 days. Until the area heals, the stump and the raw tissue beneath it are an open door for bacteria.

Omphalitis happens when bacteria from the skin, the birth canal or the environment multiply in the stump and spread into the surrounding belly wall. The most common germs are Staphylococcus aureus (including MRSA), group A and group B streptococci, and gut bacteria such as E. coli. Anaerobic bacteria can be involved, especially when the discharge smells foul.

Early signs of omphalitis

Normal healing

It is normal for the stump to look yellowish, brown, gray or black, to be slightly sticky at the base, to leave a few spots of blood on the diaper when it falls off, and to have a faint smell as it dries.

Signs of infection

• Redness of the belly skin around the stump. A ring of redness wider than about 1 cm (half an inch), or redness that is spreading, is the most important early sign. Mark the edge with a pen to see if it grows.
• Swelling and hardness of the skin around the navel
• Warmth and tenderness: the baby cries when the area is touched
• Pus (thick yellow or green discharge) or a foul smell from the stump
• Red streaks extending from the navel

Signs the infection is spreading

• fever, or a low body temperature
• poor feeding, vomiting or a swollen belly
• unusual sleepiness, floppiness or irritability
• fast breathing or pale, mottled skin

These are signs of neonatal sepsis and need emergency care.

Risk factors

• birth outside a hospital or with unclean instruments to cut the cord
• prematurity and low birth weight
• prolonged rupture of the membranes or infection of the membranes in labor
• an umbilical catheter used in neonatal intensive care
• applying unclean substances (such as dung, ash or oils) to the stump, a practice in some regions
• rarely, an immune disorder such as leukocyte adhesion deficiency, which also delays cord separation

Diagnosis

Omphalitis is diagnosed by examining the baby. Doctors may:

• swab any discharge for culture to identify the bacteria
• take blood tests (blood count, CRP, blood culture) to check for sepsis
• order an ultrasound if they suspect an abscess or a structural problem, such as a patent urachus (an open channel to the bladder that leaks urine) or a patent omphalomesenteric duct (an open channel to the bowel)

Treatment

• Antibiotics: most babies are admitted for IV antibiotics that cover staph and strep, and gut bacteria when needed. Treatment usually lasts 7 to 10 days, switching to oral antibiotics when the baby improves.
• Mild cases: a well baby with only minimal redness may be treated with topical or oral antibiotics and seen again within 24 hours, but only at a doctor's direction.
• Surgery: needed for an abscess, or urgently for necrotizing fasciitis, a rare, rapidly spreading infection of the deep tissues that causes discolored skin and severe illness.

Complications

Prompt treatment usually prevents complications. Without it, omphalitis can cause sepsis, peritonitis (infection of the belly lining), necrotizing fasciitis, clots in the portal vein of the liver (which can cause problems later in childhood), and liver abscess.

Cord care: how to prevent omphalitis

• Keep it clean and dry. In countries with hospital births, the AAP and WHO recommend dry cord care: no alcohol or creams, just keeping the stump clean and exposed to air.
• Fold the diaper below the stump so it is not covered by urine.
• Clean with plain water if it gets soiled, and pat dry.
• Sponge bathe until the stump falls off.
• Do not pull at the stump, even if it is hanging by a thread.
• Wash your hands before touching the cord area.

In settings with high rates of newborn infection, such as home births without clean delivery, WHO recommends daily chlorhexidine applied to the stump for the first week.

Frequently asked questions

What are the early signs of omphalitis?

The earliest sign is redness spreading onto the belly skin around the umbilical stump, often with swelling, warmth and tenderness. Pus, a foul smell, or red streaks are further signs. Fever, poor feeding or unusual sleepiness mean the infection may be spreading and need emergency care.

How can I tell if my baby's belly button is infected or just healing?

A healing stump can be dark, slightly sticky and have a mild smell, with a few drops of blood when it falls off. An infected stump has spreading redness on the surrounding skin, swelling, pus, a strong foul smell, or a baby who cries when it is touched.

Is omphalitis dangerous?

It can be. Most cases respond well to antibiotics if treated early, but the infection can spread into the bloodstream or deep tissues within hours to days. That is why any suspected case should be seen by a doctor the same day.

Should I put alcohol on my baby's umbilical cord?

Current advice from the American Academy of Pediatrics and WHO for babies born in hospital is dry cord care: keep the stump clean and dry without alcohol. Studies show alcohol does not prevent infection and may delay separation.

Can adults get omphalitis?

Yes, though it is different. In older children and adults, belly button infections come from piercings, poor hygiene in a deep navel, a urachal cyst or a pilonidal sinus. They cause redness, discharge and odor and are treated with cleaning, antibiotics or drainage.