RESUMEN
Heart development requires coordinated activity of various factors, the disturbance of which can lead to congenital heart defects. Heart lectin-associated matrix protein-1 (hLAMP-1) is a matrix protein expressed within Hensen's node at Hamburger-Hamilton (HH) stage 4, in the lateral mesoderm by HH stages 5-6 and enhanced within the left pre-cardiac field at HH stage 7. At HH stages 15-16, hLAMP-1 expression is observed in the atrioventricular canal and the outflow tract. Also, the role of hLAMP-1 in induction of mesenchyme formation in chick heart has been well documented. To further elucidate the role of this molecule in heart development, we examined its expression patterns during HH stages 8-14 in the chick. In this regard, we immunostained sections of the heart during HH stages 8-14 with antibodies specific to hLAMP-1. Our results showed prominent expression of hLAMP-1-positive particles in the extracellular matrix associated with the pre-cardiac mesoderm, the endoderm, ectoderm as well as neuroectoderm at HH stages 8-9. After formation of the linear heart tube at HH stage 10, the expression of hLAMP-1-stained particles disappears in those regions of original contact between the endoderm and heart forming fields due to rupture of the dorsal mesocardium while their expression becomes confined to the arterial and venous poles of the heart tube. This expression pattern is maintained until HH stage 14. This expression pattern suggests that hLAMP-1 may be involved in the formation of the endocardial tube.
Asunto(s)
Embrión de Pollo/metabolismo , Proteínas de la Matriz Extracelular/metabolismo , Corazón/embriología , Miocardio/metabolismo , Animales , Embrión de Pollo/embriología , Criopreservación/veterinaria , Cojinetes Endocárdicos/metabolismo , Endodermo/embriología , Endodermo/metabolismo , Transición Epitelial-Mesenquimal , Matriz Extracelular/metabolismo , Proteínas de la Matriz Extracelular/genética , Regulación del Desarrollo de la Expresión Génica , Inmunohistoquímica/veterinaria , Mesodermo/embriología , Mesodermo/metabolismoRESUMEN
A recent report to the Australian Government identified concerns relating to Australia's capacity to respond to a medium to large outbreak of FMD. To assess the resources required, the AusSpread disease simulation model was used to develop a plausible outbreak scenario that included 62 infected premises in five different states at the time of detection, 28 days after the disease entered the first property in Victoria. Movements of infected animals and/or contaminated product/equipment led to smaller outbreaks in NSW, Queensland, South Australia and Tasmania. With unlimited staff resources, the outbreak was eradicated in 63 days with 54 infected premises and a 98% chance of eradication within 3 months. This unconstrained response was estimated to involve 2724 personnel. Unlimited personnel was considered unrealistic, and therefore, the course of the outbreak was modelled using three levels of staffing and the probability of achieving eradication within 3 or 6 months of introduction determined. Under the baseline staffing level, there was only a 16% probability that the outbreak would be eradicated within 3 months, and a 60% probability of eradication in 6 months. Deployment of an additional 60 personnel in the first 3 weeks of the response increased the likelihood of eradication in 3 months to 68%, and 100% in 6 months. Deployment of further personnel incrementally increased the likelihood of timely eradication and decreased the duration and size of the outbreak. Targeted use of vaccination in high-risk areas coupled with the baseline personnel resources increased the probability of eradication in 3 months to 74% and to 100% in 6 months. This required 25 vaccination teams commencing 12 days into the control program increasing to 50 vaccination teams 3 weeks later. Deploying an equal number of additional personnel to surveillance and infected premises operations was equally effective in reducing the outbreak size and duration.
Asunto(s)
Control de Enfermedades Transmisibles/métodos , Erradicación de la Enfermedad/organización & administración , Brotes de Enfermedades/veterinaria , Fiebre Aftosa/epidemiología , Fiebre Aftosa/prevención & control , Animales , Australia/epidemiología , Modelos Teóricos , Probabilidad , Vacunación/veterinariaRESUMEN
PURPOSE: The purpose of this study is to determine whether specific services such as emotional and family support are currently available in the United Kingdom for people with visual impairment. METHODS: A validated online survey was created and distributed to clinical staff in eye clinics (for example, ophthalmologists and optometrists) and rehabilitation staff (for example, social and rehabilitation workers) in the community, who worked with people with visual impairment. A total of 67 clinical and 42 rehabilitation staff completed the entire survey online. RESULTS: Only 67% of the respondents claimed their clinics provide emotional support and 44% of respondent's clinics provided family support. Clinical and rehabilitation staff have differences in opinion over what constitutes an essential service for a visually impaired patient. Rehabilitation staff considered emotional support and referral to social services as essential more often than clinical staff (P<0.05). There is some confusion over the type of personnel who provides each type of service, with some services showing substantial repetition. CONCLUSION: In the clinics sampled, there appears to be an underprovision of emotional support (attentive listening plus constructive suggestions) and family support (emotional support and advice for family members) for visually impaired patients in the United Kingdom. There also seems to be some discrepancy in services that eye care professionals feel are available and previous reports by visually impaired patients of the service they receive. There is a need to develop standardised pathways across the United Kingdom, to solve some of these issues.
Asunto(s)
Personal de Salud/estadística & datos numéricos , Accesibilidad a los Servicios de Salud/estadística & datos numéricos , Baja Visión/rehabilitación , Personas con Daño Visual/rehabilitación , Encuestas de Atención de la Salud , Necesidades y Demandas de Servicios de Salud , Humanos , Oftalmología/estadística & datos numéricos , Optometría/estadística & datos numéricos , Ortóptica/estadística & datos numéricos , Servicio Social/estadística & datos numéricos , Encuestas y Cuestionarios , Reino Unido/epidemiologíaRESUMEN
Either d- or l-leucine (10(-3)m) and unsaturated long-chain fatty acids such as oleic, linoleic, and arachidonic (10(-4)m) significantly stimulated macroconidia germination of Microsporum gypseum. Saturated long-chain fatty acids did not affect germination, whereas saturated short-chain fatty acids such as caprylic, hexanoic, and butyric were completely inhibitory. Germination was followed by an increase in endogenous respiration and a decrease in dry weight of approximately 5% at 4 hr. Endogenous fatty acids and soluble carbohydrates were utilized significantly during germination. Tritiated leucine, uridine, and thymidine were incorporated respectively into protein, ribonucleic acid (RNA), and deoxyribonucleic acid (DNA) fractions within the first 5 min of germination. Incorporation of oleic-1-C(14) into RNA and protein was significantly increased after germ tube development. Net synthesis of RNA and protein started prior to germ tube protrusion. Increase in DNA could be detected only later. A significant increase in RNA and protein during the 4th hr of germination was correlated with vegetative development. Inhibition of respiration and incorporation of leucine-H(3) and uridine-H(3) into corresponding macromolecules by dl-fluorophenylalanine and phenethyl alcohol started before germ tube appearance. Griseofulvin significantly inhibited incorporation of uridine-H(3) and thymidine-H(3), but not of leucine-H(3). This inhibition occurred only after initial vegetative development. In contrast to the two other inhibitors, which substantially inhibited germination, griseofulvin only slightly retarded the period of germination and did not affect respiration.