Taenia Saginata
Taenia Saginata
MATERIAL SAFETY DATA SHEET – INFECTIOUS SUBSTANCES
SECTION I – INFECTIOUS AGENT
NAME: Taenia saginata
SYNONYM OR CROSS REFERENCE: Beef tapeworm, taeniasis, Taeniarhynchus saginatus
CHARACTERISTICS: Segmented tapeworms 4-12 m in length, cestode, head (scolex) with 4 suckers for attachment; proglottids, containing a self-contained hermaphrodite reproductive unit; eggs contain a fully developed, six-hooked (hexcanth) embryo; inhabits the human jejunum
SECTION II – HEALTH HAZARD
PATHOGENICITY: Symptoms are variable, normally minimal; Include mild abdominal cramps, nervousness, insomnia, digestive disturbances, weight loss; passage of worms can be associated with dizziness, headache, weakness, and tingling
EPIDEMIOLOGY: Worldwide; prevalent in areas where beef is improperly cooked; frequent in Yugoslavia, Moslem countries, Ethiopia and Kenya; less common in central and Latin America
HOST RANGE: Humans are definitive host; cattle are intermediate host
INFECTIOUS DOSE: Not known
MODE OF TRANSMISSION: Ingesting raw or improperly cooked beef, no person-to-person transmission
INCUBATION PERIOD: Variable; eggs occur in stool 10-14 weeks post infection
COMMUNICABILITY: Not directly transmissible from person-to-person; eggs passed from man are only infectious for cattle; eggs may continue to be shed for more than 30 years
SECTION III – DISSEMINATION
RESERVOIR: Humans, Cattle
ZOONOSIS: Cattle-to-humans via ingestion of contaminate meat
VECTORS: None
SECTION IV – VIABILITY
DRUG SUSCEPTIBILITY: Sensitive to niclosamide, paromomycin, praziquantel, albendazole
SUSCEPTIBILITY TO DISINFECTANTS: Susceptible to 1% sodium hypochlorite, 2% glutaraldehyde
PHYSICAL INACTIVATION: Sensitive to heat; freezing < 5° C for> 4 days kills the cystercerci; irradiating
SURVIVAL OUTSIDE HOST: Eggs may remain viable in the environment for months; eggs survive most forms of sewage treatment
SECTION V – MEDICAL
SURVEILLANCE: Monitor for symptoms; confirm by examining the stool for proglottids or eggs
FIRST AID/TREATMENT: Administration of the appropriate drug therapy
IMMUNIZATION: None available
PROPHYLAXIS: None available
SECTION VI – LABORATORY HAZARDS
LABORATORY-ACQUIRED INFECTIONS: None reported to date
SOURCES/SPECIMENS: Stool
PRIMARY HAZARDS: Ingestion of infective eggs
SPECIAL HAZARDS: None
SECTION VII – RECOMMENDED PRECAUTIONS
CONTAINMENT REQUIREMENTS: Biosafety level 2 practices and containment facilities for all activities involving the infective stages; Agriculture Canada may impose additional restrictions on use or importation
PROTECTIVE CLOTHING: Laboratory coat; gloves when skin contact is unavoidable
OTHER PRECAUTIONS: Special attention to personal hygiene practices and hand washing SECTION VIII – HANDLING INFORMATION
SPILLS: Allow aerosols to settle; wearing protective clothing gently cover the spill with absorbent paper towel and apply 1% sodium hypochlorite starting at the perimeter and working towards the center; allow sufficient contact time (30 min) before clean up
DISPOSAL: Decontaminate all wastes before disposal: steam sterilization, chemical disinfection, incineration
STORAGE: In sealed containers that are appropriately labelled
SECTION IX – MISCELLANEOUS INFORMATION
Date prepared: March, 2001
Prepared by: Office of Laboratory Security, PHAC
Although the information, opinions and recommendations contained in this Material Safety Data Sheet are compiled from sources believed to be reliable, we accept no responsibility for the accuracy, sufficiency, or reliability or for any loss or injury resulting from the use of the information. Newly discovered hazards are frequent and this information may not be completely up to date.
Copyright © Health Canada, 2001
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