**Core Concept**
In newborns, eye infections often result from maternal transmission or congenital infections. Common pathogens include bacteria, viruses, and other microorganisms that can cause conjunctivitis or other ocular conditions.

**Why the Correct Answer is Right**
Proteus mirabilis is a gram-negative bacterium commonly found in the gastrointestinal tract. However, it is not typically associated with neonatal conjunctivitis or eye infections. In contrast, other organisms listed are more commonly implicated in newborn eye infections. Staphylococcus aureus can cause bacterial conjunctivitis, while Gonococci (Neisseria gonorrhoeae) is a well-known cause of neonatal conjunctivitis, often transmitted from an infected mother during delivery. Chlamydia trachomatis is another significant cause of neonatal conjunctivitis, particularly if the mother has an untreated chlamydial infection. The unique flora of the newborn's eyes makes Proteus mirabilis an unlikely cause of eye infection in this population.

**Why Each Wrong Option is Incorrect**
**Option A:** Staphylococcus aureus can indeed cause eye infections, including conjunctivitis, in newborns, especially if the mother has a skin or respiratory tract infection.
**Option C:** Gonococci (Neisseria gonorrhoeae) is a significant cause of neonatal conjunctivitis, often resulting from maternal transmission during delivery.
**Option D:** Chlamydia trachomatis is another common cause of neonatal conjunctivitis, typically acquired from an infected mother.

**Clinical Pearl / High-Yield Fact**
Remember that gonococcal conjunctivitis in newborns can lead to severe complications, including corneal perforation and vision loss if left untreated. Prompt diagnosis and treatment are essential to prevent these outcomes.

✓ Correct Answer: B. Proteus mirabilis