After spending approximately 40 weeks inside the womb, the average newborn weighs 7 1/2 pounds. Most babies weigh between 5 1/2 and 10 pounds. The average length of a newborn is 20 inches (50 centimeters), with a range of 18 to 22 inches. The average head circumference (the distance around the head) is 14 inches (35 centimeters).
Lactobacillus and Bifidobacterium are the most common probiotic bacteria. The Lactobacillus genus has 18 different bacteria strains, while the Bifidobacterium genus consists of eight strains.
Antibiotics can be classified in different ways. Broad-spectrum vs Narrow-spectrum. Narrow-spectrum antibiotics act against only limited types of bacteria. List of narrow-spectrum antibiotics and their spectrum of activity: 1  Penicillin, Flucloxacillin, Dicloxacillin, Nafcillin sodium: Gram-positive bacteria. 2  Aztreonam: Gram-negative aerobic bacteria. 3  Linezolid: Gram-positive bacteria. 4  Polymyxin B: Gram-negative bacilli other than proteus.