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PubMedDate not supplied

Immunity status to poliovirus in Veneto region (north-east Italy). A seroepidemiological survey.

The immunity state to poliovirus types 1, 2, and 3 of a population aged 2 to 75 years was determined by examining 274 sera collected in the Venice mainland (North-East Italy). Altogether, the neutralizing antibody prevalences (at a titre > or = 1:2) for poliovirus 1, 2, and 3 were 99.0 percent (geometrical mean titres [GMT]: 72.1), 99.6 percent (GMT: 95.9) and 98.2 percent (GMT: 17.3), respectively, and all the age groups also showed very good levels of humoral immunity. High antibody titres (> or = 1:256) to one or more types of poliovirus were demonstrated in older age groups also, possibly indicating exposure to natural polioviruses or contact with vaccine strains. Although probably all the older subjects had practically acquired their antibodies as a result of natural infection and those under 30 through vaccination, these results indicate that the humoral immunity against poliomyelitis in our population is satisfactory, and the maintenance of such good protection level depends on an effective immunization program.

Adolescent↗
PubMed1994

Preventing strokes: considerations for developing health policy.

As the national movement for health care reform gives priority to activities that will achieve better and more efficient delivery of health care services, the cost-effectiveness of services will need to be calculated in some type of standard fashion. Although the cost-effectiveness of preventing and controlling acute diseases (for example, through mass immunization programs) has been well appreciated, less attention has been paid to the chronic diseases, which, in fact, account for the majority of illness and death in the United States today. This paper uses prevention of a common chronic disease, stroke, as a model to illustrate how cost savings measures may be developed and used to guide public policy.

Adolescent↗
PubMed1993

The value of potency testing of poliomyelitis and measles vaccines as an integral part of cold chain surveillance.

The Virology Division in the Institute for Medical Research, Kuala Lumpur, Malaysia performs potency tests on oral polio vaccines and live attenuated measles vaccines. Since these potency tests were introduced in 1981 a total of 752 tests have been performed on vaccine samples from peripheral immunization centers. Of 165 representative vaccine samples sent for potency evaluation after a cold chain breakdown 154 (87%) passed minimum potency requirements recommended for immunization of infants. In the absence of potency evaluation, those vaccines exposed to temperatures higher than the recommended storage range would be discarded, perhaps resulting in unnecessary wastage and economic loss. Results of the vaccine potency evaluation has enabled health authorities to indirectly monitor cold chain efficiency and ensure the high quality of viral vaccines used in our childhood immunization program.

Animals↗
PubMed1994

Group B streptococcal disease in the perinatal period.

Group B streptococcus is the major cause of neonatal sepsis in the United States. It is estimated that 2,000 infants die annually of syndromes related to group B streptococcus infection. In the early-onset syndrome, transmission is from mother to child, either in utero or during birth. Pneumonia is the most common presentation in infants who develop symptoms during the first seven days of life. The principal manifestation of late-onset infection is meningitis, which occurs in 85 percent of this group. Although group B streptococcus infection is normally remediable with penicillin therapy, rapid diagnosis and treatment are necessary to prevent the serious consequences of the disease. A vaccine is under development, although the cost-effectiveness of a widespread immunization program for a disease with such a low frequency is still unknown. The potentially serious outcomes of this infection, however, make it a major problem for physicians involved in neonatal care.

Humans↗
PubMed1993

Pertussis: the return of a bad penny.

We describe two related cases of pertussis infection ("whooping cough"). This disease entity was almost completely eradicated through successful mass immunization programs. In the past decade it has demonstrated a steady rise in incidence. The epidemiology, clinical manifestations, treatment, and current vaccines for pertussis infection are reviewed.

Child, Preschool↗
PubMedDate not supplied

Infectious bill atrophy syndrome caused by parvovirus in a co-outbreak with duck viral hepatitis in ducklings in Taiwan.

In October 1989, an epizootic duckling disease with high mortality occurred in Taiwan. The disease was characterized by droopiness, inappetence, ataxia, ruffled feathers, and watery diarrhea. Affected ducklings were lame, were unable to stand, showed opisthotonos, and often died 3 or 4 days after the onset of the disease. Tolerant maturing ducklings displayed atrophic upper bills with a protruding tongue and became stunted as they reached maturity. No diagnostic histopathologic lesions were found in these ducklings. Fourteen parvovirus isolates, 33 duck viral hepatitis virus (DVHV) isolates, two adenovirus isolates, and two reovirus isolates were obtained and identified from more than 500 sick ducklings in the epizootic. The epizootic was diagnosed as a co-outbreak of duck parvovirus infections and duck viral hepatitis. The high mortality in ducklings and the bill atrophy syndrome were reproduced in ducklings by inoculating the parvovirus isolates alone. The epizootic was controlled by an emergency immunization program of ducklings with sera collected from recovered ducks or a bivalent inactivated vaccine composed of local DVHV and parvovirus isolates.

Animals↗
PubMed1996

Prevention and control of influenza: Recommendations of the Advisory Committee on Immunization Practices (ACIP). Centers for Disease Control and Prevention.

These recommendations update information on the vaccine and antiviral agents available for controlling influenza during the 1996-97 influenza season (superseding MMWR 1995;44(No. RR-3):1-22). The principal changes include information about a) the influenza virus strains included in the trivalent vaccine for 1996-97 and b) extension of the optimal time for influenza vaccination campaigns for persons in high-risk groups.

Adolescent↗
PubMed1996

Recommendations of the Advisory Committee on Immunization Practices: programmatic strategies to increase vaccination rates--assessment and feedback of provider-based vaccination coverage information.

This statement by the Advisory Committee on Immunization Practices (ACIP) presents programmatic strategies to increase vaccination rates. This is the first statement to recommend the use of routine assessment and feedback of provider-based vaccination coverage information.

Centers for Disease Control and Prevention, U.S.↗