Parasitic Sexually Transmitted Infections (STIs)

Parasitic sexually transmitted infections (STIs) are caused by parasitic organisms that live and survive by benefitting from another organism that they inhabit. Treatments for parasitic STIs aim to cure and eliminate the infection.

Pubic Lice

Pubic lice, commonly called crabs, is a type of parasite that infests the genital area, lives on the pubic hair around the penis or vagina, and feeds off human blood to survive.

Ways of Transmission: 

  • Physical contact

  • Rarely through sharing personal items like towels or sheets

Symptoms:

  • Severe itching

  • Lice bites: tiny red or blue spots

  • Lice eggs: white or yellow dots attached to the pubic hair

  • Lice poo: brown spots in the underwear

Diagnosis:

Diagnosis is usually based on clinical assessment.

Treatment: 

Prescribed medicated creams or shampoos.

Some recommendations in case of infection:

  • Clothes, bed linens, and towels should be washed at a high temperature.

  • Genital hair shaving is necessary and highly recommended.

  • Avoid close physical contact until the crabs go away (which can take up to two weeks).

  • Avoid sharing clothes, bedding, or hygiene products (such as razors).

Since pubic lice can be transmitted through close body contact, condoms are not effective in preventing their transmission. However, they are always necessary to prevent other STIs.

Trichomoniasis

Trichomoniasis is a common, treatable sexually transmitted infection (STI), caused by a protozoan parasite called Trichomonas vaginalis.

Ways of Transmission: 

  • Unprotected oral, anal, and/or vaginal sex with someone who has trichomoniasis.

  • Mother to child during birth.

Symptoms:

In people with a vagina:

  • Abnormal vaginal discharge with an unusual smell

  • Vaginal itching

  • Discomfort during urination

  • Unpleasant sex

In people with a penis:

  • Urethral discharge

  • Burning after urination or ejaculation

  • Penile itching or irritation

  • Unpleasant sex

Diagnosis:

  • Vaginal or urethral swab

  • Urine sample

  • Physical examination

Treatment: 

Prescribed antibiotics and antiprotozoal

Written by:

Cristel Lahoud | Sexual health educator, midwife

Cristel Lahoud is a sexual health educator at Marsa, holding a Bachelor's degree in Midwifery and currently pursuing a Master's degree in Clinical Psychology. Her profound dedication lies in raising awareness and promoting advocacy for both sexual and reproductive health.