A case of human Chrysomya bezziana infestation confirmed

The Centre for Health Protection (CHP) of the Department of Health (DH) today (November 18) confirmed a case of Chrysomya bezziana infestation and urged members of the public to guard against the disease.

Case details are as follow:
Age: 81
Sex: Female
Place of residence: Shek Kong
Date of onset: November 14
Symptoms: Bleeding oral ulcers. Maggots were found in the patient’s oral cavity.
Present condition: Admitted to North District Hospital on November 14 and passed away on November 16 due to septicemia.
Travel history: No recent travel history.

Cumulative total received by CHP in 2005 : 4
*imported case : 0
*local case : 4
The number of cases received by DH in recent years : 9 in 2003; 8 in 2004

Chrysomya bezziana is an obligate parasite of mammals (meaning it cannot lead an independent nonparasitic existence). The site of infestation with the larvae is usually at superficial wounds and body orifices of debilitated persons.

The larvae feed on the host's dead or living tissue. Feeding activity of the larvae may cause serious tissue damage, resulting in loss of condition, injury to the skin, secondary invasion and death.

Members of the public, especially staff of elderly homes, are advised to note the following measures:
* All wounds should be treated immediately. Wound fluids and blood are known to be attractive to Chrysomya bezziana. To avoid myiasis infestation, wounds should be cleaned and dressed properly;
* Fly infestation could be avoided by proofing measures, including installation of fly screening materials to human dwelling places, dressing of wounds and maintaining good ventilation;
* Observe good personal and environmental hygiene;
* Staff of elderly homes should ensure good environmental hygiene, be alert to inmates developing symptoms of the disease and arrange inmates feeling unwell to seek medical consultation promptly.

Ends/Friday, November 18, 2005