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Titolo:
EFFECT OF DIFFERENT SURFACTANTS ON PULMONARY GROUP-B STREPTOCOCCAL INFECTION IN PREMATURE RABBITS
Autore:
SHERMAN MP; CAMPBELL LA; MERRITT TA; LONG WA; GUNKEL JH; CURSTEDT T; ROBERTSON B;
Indirizzi:
UNIV KANSAS,MED CTR,3901 RAINBOW BLVD KANSAS CITY KS 66160 UNIV CALIF LOS ANGELES,DEPT PEDIAT LOS ANGELES CA 90024 UNIV CALIF DAVIS,MED CTR,DEPT PEDIAT DAVIS CA 95616 BURROUGHS WELLCOME CO,MED CTR,DIV CLIN RES RES TRIANGLE PK NC 27709 UNIV N CAROLINA,DEPT PEDIAT CHAPEL HILL NC 00000 ROSS LABS COLUMBUS OH 00000 DANDERYD HOSP,DEPT CLIN CHEM S-18288 DANDERYD SWEDEN KAROLINSKA HOSP,EXPTL PATHOL RES UNIT S-10401 STOCKHOLM SWEDEN
Titolo Testata:
The Journal of pediatrics
fascicolo: 6, volume: 125, anno: 1994,
parte:, 1
pagine: 939 - 947
SICI:
0022-3476(1994)125:6<939:EODSOP>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
RESPIRATORY-DISTRESS SYNDROME; ALVEOLAR MACROPHAGES; SYNTHETIC SURFACTANT; ANESTHETIZED RABBITS; NEWBORN RABBITS; LUNG; INFANTS; PRETERM; BIRTH; TRIAL;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
40
Recensione:
Indirizzi per estratti:
Citazione:
M.P. Sherman et al., "EFFECT OF DIFFERENT SURFACTANTS ON PULMONARY GROUP-B STREPTOCOCCAL INFECTION IN PREMATURE RABBITS", The Journal of pediatrics, 125(6), 1994, pp. 939-947

Abstract

Objectives: To evaluate the effects of different surfactants on pulmonary infection with group B streptococci in premature rabbits and to examine the effects of different surfactants on pulmonary alveolar macrophage function of newborn rabbits. Model: Preterm and term rabbit pups. Methods: Rabbit pups were infected with GBS aerosols followed by intratracheal administration of either calf lung surfactant extract, minced porcine lung surfactant (Curosurf), synthetic surfactant (Exosurf Neonatal), minced bovine lung surfactant (Survanta), human amniotic fluid-derived surfactant, rabbit surfactant, saline vehicle, or no treatment. Intrapulmonary clearance of GBS was determined by comparing bacterial counts in left lungs cultured immediately after aerosol infection with similarly infected lungs analyzed 4 hours after surfactant therapy, Phagocytosis of streptococci was ascertained by microscopic examination of the right lungs fixed in situ at 4 hours. For comparison, anin vitro method was used to measure growth of GBS in the different surfactants. Results: Preterm animals had a sixfold increase in pulmonary bacterial growth compared with a slight decrease in intrapulmonary GBS in term animals when all were delivered by cesarean section (p < 0.05). In premature rabbits, GBS proliferation was lowest in animals treated with Exosurf Neonatal and highest in animals receiving Curosurf and human amniotic fluid-derived surfactant (p < 0.05), None of the surfactants promoted accelerated growth of GBS in comparison with controlanimals. Similar growth of GBS was seen in in vitro cultures, Intrapulmonary phagocytosis of GBS in premature pups was not altered by any of the surfactants, In term rabbit pups, the following measures of macrophage population kinetics remained normal at 1 and 24 hours after surfactant administration: viability, cell numbers based on lung lavage, and in vivo incorporation of thymidine. Conclusions: Surfactants used in clinical practice do not accelerate the in vivo growth of group B streptococci in the lungs of preterm rabbits. Some surfactants inhibit streptococcal proliferation. The effects of different surfactants are not explained by changes in macrophage function.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/04/20 alle ore 17:28:52