Serratia Marcescens is known for causing various infections in humans, particularly in those with weakened immune systems or in hospital settings. 

Urinary Tract Infections
It is a common cause of urinary tract infections, especially in patients with catheters.

Bloodstream Infections
It can lead to sepsis, which is a severe and potentially life-threatening condition.

Pneumonia
It can cause respiratory tract infections, including pneumonia, often in hospital settings.

Ocular Infections
It can infect the eyes, leading to conditions like conjunctivitis, keratitis, and endophthalmitis.

Wound Infections
It's known for causing infections in surgical wounds and other types of wounds.

Meningitis
In rare cases, it can lead to meningitis, particularly in pediatric wards.

Osteomyelitis
It can cause bone infections, especially in individuals with compromised health conditions.

This bacterium is notable for its resistance to several antibiotics, which makes treatment challenging.