Safety and Immunogenicity of a Trivalent Group B Streptococcus Vaccine in Healthy Pregnant Women

To evaluate serotype-specific Ia GBS serum IgG antibody levels (anti-Ia) in infants born to maternal subjects receiving the GBS trivalent vaccine, as measured at birth, Day 42 and Day 90 of age. Antibody concentrations were measured by Enzyme-linked immunosorbent assay (ELISA), expressed as geometric mean concentrations (GMCs), in micrograms per milliliter (µg/mL).

Time frame: At Birth, Day 42 and Day 90

Population: All screened subjects who signed informed consent form, provided demographic data and/or baseline screening assessments, were randomized and assigned a study subject ID, who correctly received the study vaccine, who had no major protocol deviation, and who provided at least one evaluable serum sample at the relevant time points.

To evaluate serotype-specific (Ia) GBS serum IgG antibody levels (anti-Ia) in maternal subjects. Antibody concentrations were measured by Enzyme-linked immunosorbent assay (ELISA), expressed as geometric mean concentrations (GMCs), in micrograms per milliliter (µg/mL).

Time frame: At Day 1 (pre-vaccination), Day 31 (post-vaccination), Delivery, Days 42 and 90 (postpartum)

Population: All screened subjects who signed informed consent form, provided demographic data and/or baseline screening assessments, were randomized and assigned a study subject ID, who correctly received the study vaccine, who had no major protocol deviation, and who provided at least one evaluable serum sample at the relevant time points.

To evaluate serotype-specific Ib GBS serum IgG antibody levels (anti-Ib) in infants born to maternal subjects receiving the GBS trivalent vaccine, as measured at birth, Day 42 and Day 90 of age. As the singleton ELISA was no longer in use at the time of serotypes Ib and III testing, results for both serotypes were tested using multiplex immunoassay

Time frame: At Birth, Day 42 and Day 90

Population: All screened subjects who signed informed consent form, provided demographic data and/or baseline screening assessments, were randomized and assigned a study subject ID, who correctly received the study vaccine, who had no major protocol deviation, and who provided at least one evaluable serum sample at the relevant time points.

To evaluate serotype-specific (Ib) GBS serum IgG antibody levels (anti-Ib) in maternal subjects. As the singleton ELISA was no longer in use at the time of serotypes Ib and III testing, results for both serotypes were tested using multiplex immunoassay.

Time frame: At Day 1 (pre-vaccination), Day 31 (post-vaccination), Delivery, Days 42 and 90 (postpartum)

Population: All screened subjects who signed informed consent form, provided demographic data and/or baseline screening assessments, were randomized and assigned a study subject ID, who correctly received the study vaccine, who had no major protocol deviation, and who provided at least one evaluable serum sample at the relevant time points.

To evaluate serotype-specific III GBS serum IgG antibody levels (anti-III) in infants born to maternal subjects receiving the GBS trivalent vaccine, as measured at birth, Day 42 and Day 90 of age. As the singleton ELISA was no longer in use at the time of serotypes Ib and III testing, results for both serotypes were tested using multiplex immunoassay.

Time frame: At Birth, Day 42 and Day 90

Population: All screened subjects who signed informed consent form, provided demographic data and/or baseline screening assessments, were randomized and assigned a study subject ID, who correctly received the study vaccine, who had no major protocol deviation, and who provided at least one evaluable serum sample at the relevant time points.

To evaluate serotype-specific (III) GBS serum IgG antibody levels (anti-III) in maternal subjects. As the singleton ELISA was no longer in use at the time of serotypes Ib and III testing, results for both serotypes were tested using multiplex immunoassay.

Time frame: At Day 1 (pre-vaccination), Day 31 (post-vaccination), Delivery, Days 42 and 90 (postpartum)

Population: All screened subjects who signed informed consent form, provided demographic data and/or baseline screening assessments, were randomized and assigned a study subject ID, who correctly received the study vaccine, who had no major protocol deviation, and who provided at least one evaluable serum sample at the relevant time points.

Geometric Mean Ratio relative to pre-vaccination (Day 1) of serotype-specific (Ia) GBS serum IgG antibody concentrations (anti-Ia) in maternal subjects. Antibody concentrations were measured by Enzyme-linked immunosorbent assay (ELISA), expressed as geometric mean concentrations (GMCs), in micrograms per milliliter (µg/mL).

Time frame: At Day 31 (post-vaccination), Delivery, Days 42 and 90 (postpartum)

Population: All screened subjects who signed informed consent form, provided demographic data and/or baseline screening assessments, were randomized and assigned a study subject ID, who correctly received the study vaccine, who had no major protocol deviation, and who provided at least one evaluable serum sample at the relevant time points.

Geometric Mean Ratio relative to pre-vaccination (Day 1) of serotype-specific (Ib) GBS serum IgG antibody concentrations (anti-Ib) in maternal subjects. As the singleton ELISA was no longer in use at the time of serotypes Ib and III testing, results for both serotypes were tested using multiplex immunoassay.

Time frame: At Day 31 (post-vaccination), Delivery, Days 42 and 90 (postpartum)

Population: All screened subjects who signed informed consent form, provided demographic data and/or baseline screening assessments, were randomized and assigned a study subject ID, who correctly received the study vaccine, who had no major protocol deviation, and who provided at least one evaluable serum sample at the relevant time points.

Geometric Mean Ratio relative to pre-vaccination (Day 1) of serotype-specific (III) GBS serum IgG antibody concentrations (anti-III) in maternal subjects. As the singleton ELISA was no longer in use at the time of serotypes Ib and III testing, results for both serotypes were tested using multiplex immunoassay.

Time frame: At Day 31 (post-vaccination), Delivery, Days 42 and 90 (postpartum)

Population: All screened subjects who signed informed consent form, provided demographic data and/or baseline screening assessments, were randomized and assigned a study subject ID, who correctly received the study vaccine, who had no major protocol deviation, and who provided at least one evaluable serum sample at the relevant time points.

Length and head circumference at birth were summarized by reporting the mean and standard deviation.

Time frame: At Birth

Population: Infants born to screened subjects who signed informed consent form, provided demographic data and/or baseline screening assessments, were randomized and assigned a study subject ID and who received a study vaccination.

Length and head circumference at birth were summarized by reporting the median and minimum and maximum

Time frame: At birth

Population: Infants born to screened subjects who signed informed consent form, provided demographic data and/or baseline screening assessments, were randomized and assigned a study subject ID and who received a study vaccination.

Weight at birth was summarized by reporting the mean and standard deviation,

Time frame: At Birth

Population: Infants born to screened subjects who signed informed consent form, provided demographic data and/or baseline screening assessments, were randomized and assigned a study subject ID and who received a study vaccination.

Weight at birth was summarized by reporting the median and the minimum and maximum.

Time frame: At Birth

Population: Infants born to screened subjects who signed informed consent form, provided demographic data and/or baseline screening assessments, were randomized and assigned a study subject ID and who received a study vaccination.

Long-term developmental outcome assessed by Bayley Scales of Infant and Toddler Development 3rd edition Screening Test (PsychCorp). The screening test measured three domains: cognitive, language (receptive vs expressive communication), and motor (fine vs gross). Scaled scores range from 1 to 19 with a mean of 10 and a standard deviation of 3. The scores were summarized by reporting the mean and standard deviation.

Time frame: At Day 180 of age

Population: Infants born to screened subjects who signed informed consent form, provided demographic data and/or baseline screening assessments, were randomized and assigned a study subject ID and who received a study vaccination.

Long-term developmental outcome assessed by Bayley Scales of Infant and Toddler Development 3rd edition Screening Test (PsychCorp). The screening test measured three domains: cognitive, language (receptive vs expressive communication), and motor (fine vs gross). Scaled scores range from 1 to 19 with a mean of 10 and a standard deviation of 3. The scores were summarized by reporting the median, minimum and maximum.

Time frame: At Day 180 of age

Population: Infants born to screened subjects who signed informed consent form, provided demographic data and/or baseline screening assessments, were randomized and assigned a study subject ID and who received a study vaccination.

Apgar (Appearance, Pulse, Grimace response, Activity and Respiration) test to evaluate the new-born's physical condition. Apgar score between 0 and 10 (highest score possible). If 1 and 5 minutes Apgar score were normal, 10 minutes Apgar score might not be required.

Time frame: At 1, 5 and 10 minutes

Population: Infants born to screened subjects who signed informed consent form, provided demographic data and/or baseline screening assessments, were randomized and assigned a study subject ID and who received a study vaccination.

Apgar (Appearance, Pulse, Grimace response, Activity and Respiration) test to evaluate the new-born's physical condition. Apgar scores between 0 and 10 (highest score possible). If 1 and 5 minutes Apgar score were normal, 10 minutes Apgar score might not be required.

Time frame: At 1, 5 and 10 minutes

Population: Infants born to screened subjects who signed informed consent form, provided demographic data and/or baseline screening assessments, were randomized and assigned a study subject ID and who received a study vaccination.

An SAE is defined as any untoward medical occurrence that at any dose results in one or more of the following: death; life-threatening; that does not refer to an event which hypothetically might have caused death if it were more severe; required or prolonged hospitalization; persistent or significant disability/incapacity; congenital anomaly/or birth defect; any important and significant medical event that may not be immediately life-threatening or resulting in death or hospitalization but, based upon appropriate medical judgement, may jeopardize the subject or may require intervention to prevent one of the other outcomes listed above. An MAE is defined as an adverse event that leads to an unscheduled visit to a healthcare practitioner.

Time frame: From Birth through Day 180 of age

Population: Infants born to screened subjects who signed informed consent form, provided demographic data and/or baseline screening assessments, were randomized and assigned a study subject ID and who received a study vaccination and who provided data on unsolicited adverse events.

An AE is defined as any untoward medical occurrence in a subject or clinical investigation subject administered a pharmaceutical product at any dose that does not necessarily have to have a causal relationship with this treatment. Therefore, an AE can be any unfavorable and unintended sign (including an abnormal laboratory finding, for example), symptom, or disease temporally associated with the use of an investigational product, whether or not considered related to the investigational product. This definition includes inter-current illnesses or injuries and exacerbation of pre-existing conditions.

Time frame: From Study Day 1 through Study Day 31

Population: All screened subjects who signed informed consent form, provided demographic data and/or baseline screening assessments, were randomized and assigned a study subject ID and who received a study vaccination and who provided data on unsolicited adverse events.

An SAE is defined as any untoward medical occurrence that at any dose results in one or more of the following: death; life-threatening; that does not refer to an event which hypothetically might have caused death if it were more severe; required or prolonged hospitalization; persistent or significant disability/incapacity; congenital anomaly/or birth defect; any important and significant medical event that may not be immediately life-threatening or resulting in death or hospitalization but, based upon appropriate medical judgement, may jeopardize the subject or may require intervention to prevent one of the other outcomes listed above. An MAE is defined as an adverse event that leads to an unscheduled visit to a healthcare practitioner.

Time frame: From Study Day 32 through Day 180 postpartum

Population: All screened subjects who signed informed consent form, provided demographic data and/or baseline screening assessments, were randomized and assigned a study subject ID and who received a study vaccination and who provided data on unsolicited adverse events.

An SAE is defined as any untoward medical occurrence that at any dose results in one or more of the following: death; life-threatening; that does not refer to an event which hypothetically might have caused death if it were more severe; required or prolonged hospitalization; persistent or significant disability/incapacity; congenital anomaly/or birth defect; any important and significant medical event that may not be immediately life-threatening or resulting in death or hospitalization but, based upon appropriate medical judgement, may jeopardize the subject or may require intervention to prevent one of the other outcomes listed above. An MAE is defined as an adverse event that leads to an unscheduled visit to a healthcare practitioner.

Time frame: From Study Day 1 through Study Day 31

Population: All screened subjects who signed informed consent form, provided demographic data and/or baseline screening assessments, were randomized and assigned a study subject ID and who received a study vaccination and who provided data on unsolicited adverse events.

Percentage and frequency of maternal subjects with solicited local and solicited systemic AEs up to Study Day 7 and calculated for four time intervals after vaccination: 30 minutes, Study Days 1-3 (without 30 min), Study Days 4-7, Study Days 1-7 (without 30 min). Threshold for Ecchymosis, Erythema, Swelling and Induration: Grade 0 (\<25 mm), Any (≥ 25 mm). Systemic fever includes subjects with body temperature ≥ 38 °C irrespective of route of measurement.

Time frame: Up to 30 minutes post-vaccination

Population: All screened subjects who signed informed consent form, provided demographic data and/or baseline screening assessments, were randomized and assigned a study subject ID and who received a study vaccination and who provided data on post-vaccination local or systemic adverse events.

Percentage and frequency of maternal subjects with solicited local and solicited systemic AEs up to Study Day 7 and calculated for four time intervals after vaccination: 30 minutes, Study Days 1-3 (without 30 min), Study Days 4-7, Study Days 1-7 (without 30 min). Threshold for Ecchymosis, Erythema, Swelling and Induration: Grade 0 (\<25 mm), Any (≥ 25 mm). Systemic fever includes subjects with body temperature ≥ 38 °C irrespective of route of measurement.

Time frame: During Study Days 1-3 (from 6 hours through Day 3 post-vaccination)

Population: All screened subjects who signed informed consent form, provided demographic data and/or baseline screening assessments, were randomized and assigned a study subject ID and who received a study vaccination and who provided data on post-vaccination local or systemic adverse events.

Percentage and frequency of maternal subjects with solicited local and solicited systemic adverse events up to Study Day 7 and calculated for four time intervals after vaccination: 30 minutes, Study Days 1-3 (without 30 min), Study Days 4-7, Study Days 1-7 (without 30 min). Threshold for Ecchymosis, Erythema, Swelling and Induration: Grade 0 (\<25 mm), Any (≥ 25 mm). Systemic fever includes subjects with body temperature ≥ 38 °C irrespective of route of measurement.

Time frame: During Study Days 1-7 (from 6 hours through Day 7 post-vaccination)

Population: All screened subjects who signed informed consent form, provided demographic data and/or baseline screening assessments, were randomized and assigned a study subject ID and who received a study vaccination and who provided data on post-vaccination local or systemic adverse events.

Percentage and frequency of maternal subjects with solicited local and solicited systemic AEs up to Study Day 7 and calculated for four time intervals after vaccination: 30 minutes, Study Days 1-3 (without 30 min), Study Days 4-7, Study Days 1-7 (without 30 min). Threshold for Ecchymosis, Erythema, Swelling and Induration: Grade 0 (\<25 mm), Any (≥ 25 mm). Systemic fever includes subjects with body temperature ≥ 38 °C irrespective of route of measurement.

Time frame: During Study Days 4-7

Population: All screened subjects who signed informed consent form, provided demographic data and/or baseline screening assessments, were randomized and assigned a study subject ID and who received a study vaccination and who provided data on post-vaccination local or systemic adverse events.

To evaluate the relationship of serotype-specific Ia GBS IgG antibody levels (anti-Ia) in the infant serum to the GBS IgG antibody levels in the maternal serum at the time of delivery/birth. Antibody concentrations were measured by Enzyme-linked immunosorbent assay (ELISA), expressed as geometric mean concentrations (GMCs), in micrograms per milliliter (µg/mL).

Time frame: At Delivery

Population: All screened subjects who signed informed consent form, provided demographic data and/or baseline screening assessments, were randomized and assigned a study subject ID, who correctly received the study vaccine, who had no major protocol deviation, and who provided at least one evaluable serum sample at the relevant time points.

To evaluate the relationship of serotype-specific Ib GBS IgG antibody levels (anti-Ib) in the infant serum to the GBS IgG antibody levels in the maternal serum at the time of delivery/birth. As the singleton ELISA was no longer in use at the time of serotypes Ib and III testing, results for both serotypes were tested using multiplex immunoassay.

Time frame: At Delivery

Population: All screened subjects who signed informed consent form, provided demographic data and/or baseline screening assessments, were randomized and assigned a study subject ID, who correctly received the study vaccine, who had no major protocol deviation, and who provided at least one evaluable serum sample at the relevant time points.

To evaluate the relationship of serotype-specific III GBS IgG antibody levels (anti-III) in the infant serum to the GBS IgG antibody levels in the maternal serum at the time of delivery/birth. As the singleton ELISA was no longer in use at the time of serotypes Ib and III testing, results for both serotypes were tested using multiplex immunoassay.

Time frame: At Delivery

Population: All screened subjects who signed informed consent form, provided demographic data and/or baseline screening assessments, were randomized and assigned a study subject ID, who correctly received the study vaccine, who had no major protocol deviation, and who provided at least one evaluable serum sample at the relevant time points.