Preventing the Spread of Shigella
At a Glance
Shigella is highly contagious and spreads easily through the fecal-oral route. To prevent transmission, practice rigorous handwashing with soap and water, disinfect bathrooms with bleach, avoid preparing food for others, and follow health department rules before returning to work or school.
Because Shigella is so highly contagious, your recovery involves more than just feeling better—it involves protecting your family, friends, and community. Even after your diarrhea stops, you may still carry the bacteria in your system and pass it to others [1][2].
How Transmission Happens
Shigellosis is spread through the fecal-oral route. Because it takes as few as 10 to 100 bacteria to cause illness, transmission can happen through very subtle contact [3][4]:
- Direct Contact: Touching a hand or surface that has microscopic amounts of bacteria on it.
- Indirect Contact: Consuming food or water contaminated by an infected person [5].
- Sexual Contact: Exposure during sexual activity [6].
Preventing Spread at Home
If you or your child are recovering at home, these steps are essential:
- Meticulous Handwashing: Wash your hands with soap and water for at least 20 seconds after using the bathroom, changing a diaper, before preparing food, and before touching others [5][7]. Note: Alcohol-based hand sanitizers are less effective than mechanical washing with soap and water for removing Shigella and other GI bugs.
- Safe Diapering: If caring for a sick infant, wear disposable gloves if possible when changing diapers. Immediately place the soiled diaper in a sealed, dedicated trash bin, and aggressively wash your hands and the changing surface afterward.
- Bathroom Disinfection: Clean and disinfect toilets, flush handles, and faucet handles after every use while you have diarrhea using a bleach-based household cleaner to effectively kill the bacteria [8].
- Food Safety: Do not prepare food for others until you have been cleared by a doctor or your symptoms have fully resolved [5].
- Laundry: Wash any clothing or linens soiled with stool in hot water and dry them on high heat.
Guidance for Sexual Health
Shigellosis is recognized as a sexually transmissible infection (STI), particularly among gay, bisexual, and other men who have sex with men (GBMSM) [6][9]. To prevent transmission:
- Total Abstinence: Do not have sex (oral, anal, or vaginal) while you have diarrhea and for at least 2 weeks after all symptoms have completely stopped [6].
- Oral-Anal Contact: Avoid oral-anal contact for 4 to 6 weeks after symptoms end [6].
- Hygiene: Thoroughly wash genitals, the anus, and any sex toys before and after sexual activity [6][10].
Returning to School and Work
Public health departments have strict rules for when it is safe to return to group settings.
High-Risk Occupations
If you work in a high-risk setting (food service, healthcare, childcare), you may be prohibited from returning until you provide one or two negative stool cultures—taken at least 24 hours apart—to prove you are no longer shedding the bacteria [11].
Daycare and Schools
Children should stay home from daycare or school until their diarrhea has completely stopped for at least 24 to 48 hours. Children in diapers may also need negative stool tests before returning to a childcare center [11]. Always check with your local health department or school for their specific requirements.
Common questions in this guide
How does Shigella spread?
When is it safe to return to work or school after a Shigella infection?
Can Shigella be transmitted sexually?
Does hand sanitizer kill Shigella?
Can I prepare food for others while recovering from Shigella?
Questions to Ask Your Doctor
Curated prompts to bring to your next appointment.
- 1.What are the specific local health department rules for me returning to my job or my child returning to daycare?
- 2.Do I need to provide one or more negative stool cultures before I am cleared to go back to work?
- 3.Since I have completed my treatment, how much longer am I likely to shed the bacteria in my stool?
- 4.How can I safely care for a child or elderly relative in my home without putting them at risk?
Questions For You
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References
References (11)
- 1
Dynamics of the gut microbiome in subjects challenged with Shigella sonnei 53G in a controlled human infection model.
Liechty Z, Baldwin A, Isidean S, et al.
mSphere 2025; (10(4)):e0090624 doi:10.1128/msphere.00906-24.
PMID: 40152601 - 2
Intercontinental dissemination of azithromycin-resistant shigellosis through sexual transmission: a cross-sectional study.
Baker KS, Dallman TJ, Ashton PM, et al.
The Lancet. Infectious diseases 2015; (15(8)):913-21.
PMID: 25936611 - 3
Impact of an intranasal L-DBF vaccine on the gut microbiota in young and elderly mice.
Lu T, Ericsson AC, Dietz ZK, et al.
Gut microbes 2024; (16(1)):2426619 doi:10.1080/19490976.2024.2426619.
PMID: 39520707 - 4
Shigellosis.
Hendrick J, Raqib R, Noor Z, et al.
Lancet (London, England) 2025; (406(10511)):1508-1519 doi:10.1016/S0140-6736(25)01033-5.
PMID: 40915309 - 5
Clinical features, risk factors, and impact of antibiotic treatment of diarrhea caused by Shigella in children less than 5 years in Manhiça District, rural Mozambique.
Vubil D, Acácio S, Quintò L, et al.
Infection and drug resistance 2018; (11()):2095-2106 doi:10.2147/IDR.S177579.
PMID: 30464552 - 6
Sexually transmitted shigellosis.
Pirš M
Acta dermatovenerologica Alpina, Pannonica, et Adriatica 2024; (33(4)):199-203.
PMID: 39707895 - 7
Importation and domestic transmission of Shigella sonnei resistant to ciprofloxacin - United States, May 2014-February 2015.
Bowen A, Hurd J, Hoover C, et al.
MMWR. Morbidity and mortality weekly report 2015; (64(12)):318-20.
PMID: 25837241 - 8
The changing epidemiology of shigellosis in Australia, 2001-2019.
Ibrahim AF, Glass K, Williamson DA, et al.
PLoS neglected tropical diseases 2023; (17(3)):e0010450 doi:10.1371/journal.pntd.0010450.
PMID: 36857390 - 9
Elevated Risk for Antimicrobial Drug-Resistant Shigella Infection among Men Who Have Sex with Men, United States, 2011-2015.
Bowen A, Grass J, Bicknese A, et al.
Emerging infectious diseases 2016; (22(9)):1613-6 doi:10.3201/eid2209.160624.
PMID: 27533624 - 10
A Qualitative Evaluation of the Acceptability of Shigellosis Prevention Recommendations Among Gay, Bisexual, and Other Men Who Have Sex With Men.
Burns-Lynch C, Garcia-Williams A, Besrat B, et al.
Sexually transmitted diseases 2024; (51(8)):534-539 doi:10.1097/OLQ.0000000000001968.
PMID: 38860671 - 11
Feasibility of containing shigellosis in Hubei Province, China: a modelling study.
Rui J, Chen Q, Chen Q, et al.
BMC infectious diseases 2020; (20(1)):643 doi:10.1186/s12879-020-05353-4.
PMID: 32873241
This page is for educational purposes only and should not replace professional medical advice. Always follow your local health department's guidelines for returning to work, school, or childcare after a Shigella infection.
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