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Feb 23, 2024 · Carrier. 1. A person or animal harboring a specific Infectious Agent in the absence of discernible clinical disease and which serves as a potential source of infection. The carrier state may occur in an individual with an infection that is inapparent throughout its course (known as a healthy or asymptomatic carrier) or the carrier state may ...
Sep 5, 2022 · The classical features of an individual said to be a carrier of Streptococcus pyogenes (Group A streptococcus) is the confirmed presence of the organism in their posterior pharynx, without any of the usual attendant clinical symptoms of acute pharyngitis. This chapter provides an overview and discussion of relevant topics of S. pyogenes carriage, including its prevalence, longitudinal studies ...
- Judith Martin
- 2022/10/04
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In addition to the terms listed in Table Table1, 1, other terms and adjectives used to describe microbes and their interactions with the host in the literature include pure saprophytes , pure parasite , half parasite , classical , persister , nosocomial , iatrogenic , convalescent carrier , precocious carrier , chronic carrier , contact carrier ...
Contact transmission includes direct contact or indirect contact. Person-to-person transmission is a form of direct contact transmission. Here the agent is transmitted by physical contact between two individuals (Figure 12.4.1 12.4. 1) through actions such as touching, kissing, sexual intercourse, or droplet sprays.
Bacterial carrier strains can be attenuated by targeted disruption of virulence genes allowing the fine-tuning of pathogenicity, immunogenicity and/or adjuvanticity. Molecular syringes can be modified such that modified pathogenicity factors and/or heterologous antigens are delivered to host cells.
Dec 23, 2011 · Colonization is the presence of a PPM in an internal organ that is normally sterile (e.g., lower airways, bladder) without inflammatory host response. The diagnostic sample yields <10 5 CFU/ml of diagnostic sample. Infection is a microbiologically proven clinical diagnosis of inflammation.
Oct 9, 2021 · One characteristic of the few Salmonella enterica serovars that produce typhoid-like infections is that disease-free persistent infection can occur for months or years in a small number of individuals post-convalescence. The bacteria continue to be shed intermittently which is a key component of the epidemiology of these infections. Persistent chronic infection occurs despite high levels of ...