Compared with individuals with a CD4 count ≥350 cells/μL at the t

Compared with individuals with a CD4 count ≥350 cells/μL at the time of SAB diagnosis, the adjusted IRR was 10.2 (95% CI 6.0–17.3) for individuals in the lowest CD4 cell count stratum (<100 cells/μL). IDU as HIV transmission group, nonsuppressed HIV RNA and lack of HAART remained significantly associated with

SAB. Compared with MSM, IDUs were at a 5-fold increased risk of SAB. Table 5 OSI-744 order shows the multivariate analysis repeated after stratification on HIV transmission group. Latest CD4 count <100 cells/μL remained the strongest predictor for SAB in all the groups, although the association was much more pronounced in the MSM group, with an IRR of 31.1 compared with 3.8 for IDUs. In this study, we found that the incidence of SAB among HIV-infected individuals declined between 1995 and 2007, but remained higher than that among HIV-uninfected individuals. The burden of SAB was unevenly distributed among groups of HIV-infected individuals, with IDUs having a higher IR than other transmission groups. Among HIV-infected individuals, immunodeficiency was the strongest predictor

of SAB, although this association was much more pronounced in the MSM group compared with the IDUs. IDU, nonsuppressed HIV RNA and lack of HAART were also predictors of SAB. However, the origin of SAB is likely to differ fundamentally by HIV transmission group. Few population-based studies of SAB in HIV-infected and uninfected

learn more individuals have been carried out and to our knowledge this is the largest study yet. Senthilkumar et al. [4] investigated 84 cases of SAB, of which seven were recurrent episodes. The study, which included men diagnosed with SAB from 1994 to 1997, reported an IRR of 16.5 for HIV-associated SAB. The majority of cases were related to intravascular devices delivering intravenous treatments required for manifestations of severe immunodeficiency. Our study supports the findings that SAB in the MSM group is largely HA and associated with low CD4 cell counts, suggesting that MSM mafosfamide acquired SAB while being treated for AIDS-associated diseases. By including men and women from all HIV transmission groups over a longer, contemporary time period, we have added further knowledge to this field. We found that IDUs predominantly had CA SAB acquired at higher CD4 cell counts. These cases are presumably related to active drug injection. However, the IDUs’ risk of SAB increased at lower CD4 cell counts, indicating that immunodeficiency per se increased the risk of SAB. We further found that IRs and IRRs varied considerably over time and by HIV transmission group. Our IRR of 42 in the early time period is 2.5-fold higher than that reported by Senthilkumar et al. and probably reflects the higher proportion of IDUs in our study population. A population-based study by Laupland et al.

HIV-seropositive individuals should receive IAV vaccination each

HIV-seropositive individuals should receive IAV vaccination each year (category Ib recommendation) HIV-seronegative, immunocompromised individuals have prolonged shedding of IAV but there are limited data on the duration of shedding in HIV-seropositive individuals [147]. However, this possibility should be considered and appropriate droplet infection control policies implemented for both outpatients and in-patients with advanced immunosuppression. Recent data for pandemic H1N1 IAV have shown no evidence for prolonged

viral shedding in a group of HIV-seropositive children, with CD4 T-cell counts >350 cells/μL receiving HAART but not neuraminidase inhibitors, when compared to historical controls [148]. Moreover when oseltamivir was prescribed it significantly Dabrafenib mw shortened the duration of shedding, therefore IAV treatment

may reduce secondary transmission in HIV-seropositive individuals, regardless of symptoms and treatment of index cases may be considered as a preventative measure (category IV recommendation). In line with recommendations for the general population the use of antiviral prophylaxis is not routinely required in HIV-seropositive individuals exposed to IAV [137]. For individuals who are (1) significantly immunosuppressed (CD4 T-cell count <200 cells/μL), (2) have not received vaccination or are believed to be at significant risk of vaccine non-response due to either immunosuppression buy GSK2126458 or recent administration and (3) have been exposed within the last 48 h, antiviral prophylaxis may be considered although there are no HIV-specific data currently on which

to base this recommendation (category IV recommendation). Oseltamivir is most often prescribed for prophylactic use in the general population using 75 mg od for 10 days although in more significantly immunosuppressed individuals or in the presence of oseltamivir-resistance, inhaled zanamivir 10 mg od for 10 days may be considered [137]. Some authorities recommend doubling the dose of these agents to levels equivalent to treatment doses (oseltamivir 75 mg bd orally AZD9291 or zanamivir 10 mg bd by inhalation) for 10 days in more severely immunocompromised individuals. This area, like treatment recommendations discussed above, changes from year to year therefore practitioners are referred to national guidance on IAV management, which varies from year to year. In the UK these guidelines are provided by the Health Protection Agency [137]. “
“The success of antiretroviral therapy (ART) for treating HIV infection is now being turned towards HIV prevention. The Swiss Federal Commission for HIV/AIDS has declared that HIV-positive persons who are treated with ART, have an undetectable viral load, and are free of co-occurring sexually transmitted infections (STIs) should be considered noninfectious for sexual transmission of HIV.

Selenomonas ruminantium, F succinogenes, and total bacteria were

Selenomonas ruminantium, F. succinogenes, and total bacteria were quantified using a LightCycler system (Roche, Mannheim, Germany) as described by Koike et al. (2007). Optimal PCR conditions for clade II of S. ruminantium were experimentally defined (annealing temperature for 62 °C and extension time for 15 s). Total DNA from ruminally incubated hay stems and whole rumen content obtained in a previous experiment (Koike et al., 2003a) were used as templates to monitor the changes in the abundance of S. ruminantium, F. succinogenes, and total bacteria over time. The details of these samples are as described by Koike et al. (2003a). In brief, orchardgrass hay stems in a

nylon bag were suspended in sheep rumen, and samples were periodically withdrawn (at 10, 60, and 120 min, and Selleck ERK inhibitor 6, 14, 24, 48 and 96 h) and rinsed. Whole rumen content was also periodically taken (at 0, 2, 6, 14, and 24 h after feeding). Both in sacco and in vivo samples (n = 3) were stored at −80 °C until DNA extraction. The abundance of clade I was estimated by subtracting the assay value of clade II from the species (S. ruminantium)-specific assay value, for which primers for the species-specific

assay had been confirmed to amplify clade II bacteria. All assay values were expressed as copy numbers of bacterial 16S rRNA gene g−1 sample. Data of bacterial adhesion, acid production, and fiber digestion were subjected LGK 974 to anova followed by the Tukey–Kramer test using the GLM procedure of SAS (1989). Comparison of mean value between two clades was made by Student’s t-test. Statistical significance was defined as P < 0.05.

Of 154 Gram-negative curved rods recovered from roll tubes, 19 isolates were identified as S. ruminantium and its relatives based on their 16S rRNA sequences. These isolates were classified into two clades (I and II) (Fig. 1). Clade I comprised 13 novel isolates obtained in the present study, together with the S. ruminantium type strain GA192 and other 21 known isolates of S. ruminantium. The sequence similarity Methane monooxygenase within this clade I ranged from 93.8% to 99.7%. Although branching of clade II from clade I was not supported by a bootstrap value (< 80%), clade II comprised six novel isolates found in the present study, a previously cultured rumen bacterium (RC-11) and three uncultured bacteria, and the sequence similarity within the clade II ranged from 95.6% to 98.4%. Clade I isolates obtained in the present study showed high sequence similarity (97.5–99.2%) with known isolates of S. ruminantium, while clade II isolates shared a low sequence similarity (93.6–94.9%) with those isolates (Table 1). All isolates produced propionate and acetate as the main metabolites, while the presence and activity of fibrolytic enzymes (CMCase and xylanase) differed among isolates and even within clades (Table 1). Ten of 14 isolates of clade I displayed CMCase activity, while all six isolates of clade II lacked this enzyme or exhibited low activity.

Until 2002, this occurred almost annually after the Hajj However

Until 2002, this occurred almost annually after the Hajj. However,

potentially risks may still occur, as illustrated by a 2009 case of an individual aged 43 years who contracted a fluoroquinolone-resistant strain of Neisseria meningitidis serogroup A.12 The patient developed symptoms within 24 hours of returning to Italy after traveling to Delhi and Chennai in India, with a stopover of a few hours in Frankfurt, Germany. Although the patient had no known contact with anyone in India Bcl-2 inhibitor with previous or current meningococcal disease, testing revealed the strain was the same that had caused epidemics in the area in 2005 to 2006. Fortunately, no known secondary cases have been reported in Italy.12 During epidemics of meningococcal disease in sub-Saharan Africa, the so-called African meningitis belt that stretches from Senegal to Ethiopia, as many as 1,000 per 100,000 population may be affected.25 Recently, the epidemic-susceptible

area has been expanded to Guinea-Bissau, Guinea, the Galunisertib mouse Ivory Coast, Togo, the Central African Republic, and Eritrea.8 Countries around the Rift Valley and Great Lakes regions are also now considered to be at risk (Figure 3).26,27 The risk of meningococcal disease in the population in this area is particularly elevated during the dry season between December and June because of dust winds and background upper respiratory tract infections. However, due to the dynamics of climate variability, risk exists somewhat all year. Population displacements, such as when nomads and farmers congregate in traditional market areas, and overcrowded living conditions can increase the risk of transmission and contribute to epidemics of disease.28 According to the World Health Organization (WHO), in the 2009 epidemic season, 78,416 suspected cases of meningococcal disease, including 4,053 deaths, were reported in 14 African countries implementing enhanced surveillance techniques.28 This represents Fossariinae the largest number of cases and

deaths since the previous large meningococcal disease epidemic in this region in 1996 to 1997, during which >25,000 people died.25 However, to our knowledge, there has not been a single case published about a traveler having been affected in the African meningitis belt. At the least, to some extent, this may be due to the fact that, following essentially congruent vaccination recommendations, a fair proportion of high-risk travelers may have been protected appropriately. This may also be, in part, because active surveillance is limited in Africa, Latin America, and Asia,25 which may result in an underestimation of burden. Finally, an important proportion of travelers has a different behavior and far more social distancing as compared to the local population. During the annual Hajj pilgrimage, >2 million Muslims from across the globe travel to Mecca and Medina.

Participants were asked to estimate their current pain prevalence

Participants were asked to estimate their current pain prevalence and severity (an 11-point numerical scale) and also to estimate what these would be in the absence of any treatment. The questionnaire was piloted before being distributed. Non-respondents were sent a reminder

and replacement questionnaire. Acceptability and validity of the pain management questions were assessed by interviewing a random sample of 20 participants who had provided contact details. The interview included a check on current medications (based on a brown bag review). The item agreement between answers to the questionnaire, and the answers to the selleckchem same questions at the interview, was assessed using a sensitivity analysis, and the Prevalence And Bias Adjusted Kappa (PABAK). Differences in perceived pain prevalence and severity in the presence and absence of pain management were assessed for significance (95% confidence interval; Wilcoxon signed rank test) The study was approved by the North of Scotland Research Ethics Committee. One thousand six hundred four (36.3%)

patients returned a completed questionnaire. The agreement between responses to questions in the questionnaire was ‘almost perfect’ as demonstrated by MAPK inhibitor a PABAK of 0.95. Taking the interview data as the gold standard, the questionnaire had a sensitivity of 91.9% and a specificity of 97.9%. Participants reported that there were no difficulties in completing the pain management questions. Current pain was reported by 50.5% (95%CI = 48.0, 52.9) PTK6 of respondents; when the effect of current pain management was taken into account, this increased to 56.2% (95%CI = 53.7, 58.7). This difference was statistically significant (difference = 5.7%; 95%CI = 2.2, 9.2). Likewise, when pain management was taken into account, perceived pain severity was significantly increased (p < 0.001) from a median of 3 (IQR = 2, 6) to a median of 6 (IQR = 4, 8). Incorporating pain management

questions into pain surveys is feasible. It results in increased estimates of pain prevalence and severity, because respondents report their pain without the benefit of treatment . This is the first study that has quantified the under-reporting of pain when pain management is not taken into account. Future studies of pain should collect and consider pain management information when assessing the burden of pain. 1. Bruhn H et al., 2013. Pharmacist-led management of chronic pain in primary care: results from a randomised controlled exploratory trial. BMJ Open, vol. 3, no. 4. A. N. Rasheda,b, C. Whittleseac, B. Forbesa, S. Tomlina,b aKing’s College London, King’s Health Partners, London, UK, bEvelina London Children’s Hospital, Guy’s & St. Thomas’ NHS Foundation Trust, London, UK, cDurham University, London, UK No standard guidance for intravenous nurse/patient-controlled analgesia preparation in current practice.

Symptoms may be discreet and comprise an urticarial rash and/or a

Symptoms may be discreet and comprise an urticarial rash and/or angio-edema, medium grade fever, a non-productive cough, abdominal pain, and diarrhea.5,10,19–22 In most patients of this cluster, symptoms were mild and had already resolved before treatment was given. In practice, AS is usually not recognized by primary

health care providers who are not familiar with tropical pathology. When the first symptoms appear, eosinophilia may not yet be raised.10 As illustrated with this cluster, eosinophilia will however increase rapidly in the course of the following days to levels rarely seen in other parasitic PTC124 diseases. Diagnosis is thus likely when at least one of the above symptoms appears in association with a clearly raised eosinophil count and with a primary exposure to schistosomiasis up to 90 days prior, pending confirmation of schistosome infection.1,23,24 In the early disease stage, diagnosis cannot be reliably confirmed by antibody tests or parasite detection methods.6,25 However, by the time patients are referred to a travel clinic, evidence of schistosomiasis

is found in most, mainly by serum antibody detection and/or ova detection in feces or urine.6,10,23,25 The current techniques for the laboratory diagnosis of AS have some shortcomings. Antibody production against adult worm and egg antigens starts only after schistosomules in the liver have been matured and after oviposition has started around the perirectal or perivesical venous plexus. This occurs at the earliest FDA approved Drug Library 6 weeks after infection, when symptoms may have largely subsided. Serological techniques used in clinical practice do not distinguish active infection from past exposure nor provide reliable information on parasite burden, and are not species-specific. Most routine techniques detect IgG, IgM, or IgE against soluble worm antigen (SWA) or soluble egg antigen (SEA) by ELISA, HAI or immunofluorescence. When combining assays using different sets of antigens in parasitologically confirmed infection, sensitivity may exceed 90% while retaining specificity at over

97%, but is less in AS.10,11,26,27 In this cluster, seroconversion failed to happen in three patients during the follow-up period, one parasitologically confirmed and two with symptomatic AS. Whether this is due to early treatment, a low parasite burden, or host Cyclic nucleotide phosphodiesterase immune response factors is unclear. In most travelers and migrants, established schistosomiasis infection is predominantly asymptomatic and with a low parasite burden, so that eggs are often not found in excreta.28,29 Nevertheless schistosome eggs were detected in feces of nearly all (6/7) symptomatic patients of this cluster. This may be due to low average age of patients, as well as to the relatively long average time lapse between exposure and diagnosis.30 There is thus a need for a more sensitive qualitative diagnostic test that confirms schistosomiasis infection at an earlier stage.

It is sometimes difficult to decide if one foot is warmer than no

It is sometimes difficult to decide if one foot is warmer than normal (e.g. due to infection or Charcot foot) or, if in fact, the other foot is cooler due to PAD. Redness of the foot may occur in infection, but is also seen in severe PAD (Figure 1). PAD may also mask the inflammatory response to infection so learn more the

signs of infection may be very subtle or missed. Infection can also lead to discomfort or pain in the ischaemic foot and can be the trigger for the development of CLI in an ‘at risk’ foot. Palpation of the foot pulses includes the presence or absence of the posterior tibial, and dorsalis pedis pulses (up to 10% of the normal population do not have a palpable dorsalis pedis). It is exceedingly unusual to have a clearly palpable foot pulse in advanced CLI. The main exception to this would be distal small vessel embolisation causing localised tissue infarction. When there is uncertainty about the presence of a pulse it is best to assume that the pulse(s) is

absent and arrange further investigation. Assessment for any lower limb neuropathy is also vital.3,20 All people with diabetes should undergo annual foot screening, including palpation of foot pulses3,20 by a suitably trained health care professional,4 with subsequent classification of their current risk status, and a management plan then agreed with the patient. www.selleckchem.com/CDK.html If found to be other than at low current risk (i.e. increased/moderate or high risk), without current active foot disease,

then they should receive review by a member of the ‘foot protection team’3,4 or a podiatrist20 at regular intervals.3,20–22 Although, as mentioned above, the diagnosis of CLI is highly unlikely in the presence of unless a clearly palpable foot pulse, the presence of a foot pulse does not exclude the diagnosis of PAD. ABPI may be useful in this situation as a supporting diagnostic test. Of course, all active foot disease, e.g. new (or deteriorating) foot ulcer, discolouration, swelling, or CLI (with or without tissue loss) should be referred rapidly (within 24 hours) to the specialist diabetes ‘multidisciplinary foot team’ (MDFT).3,20,22,23 Although further investigation is possible outside specialist centres, e.g. ABPI (see below), if CLI is suspected on the grounds of a simple but thorough history and examination, then urgent onward referral is indicated. For patients with diabetes and associated tissue loss or ulceration then this would usually be to the specialist diabetes MDFT. Where pain is the predominant symptom, without tissue loss, this may be to the vascular team depending on local pathways. No matter what the local pathway, it is vital that urgent referral and subsequent review are arranged.

Each CS was presented for 10 s during the experiment and the US w

Each CS was presented for 10 s during the experiment and the US was administered at 9.85 s in paired trials and co-terminated with the CS (Fig. 1A). At 7 s after CS onset, subjects performed an expectancy rating, which consisted of judging the likelihood of US delivery on a discrete scale. For this purpose, three symbols (−, ? and +) appeared underneath the fractal images for 2 s and participants rated the likelihood via button press according to the symbols’ meaning (“no shock”, “maybe shock”, “shock”). The intertrial interval varied randomly selleck kinase inhibitor between 9 and 11 s across trials. During the intertrial interval

a fixation cross was shown on the screen. The instructions were to concentrate on the images and complete the expectancy rating spontaneously in every trial. Subjects were aware that their responses did not influence the likelihood of US delivery. Before the experiment, subjects were familiarized with the task using different fractal images without US presentation. INCB024360 clinical trial Subjects were not informed about the two experimental phases prior to the experiment and the reversal stage started immediately after acquisition without announcement. Task presentation and recording of behavioural responses were performed with the software Presentation (Neurobehavioral Systems, Albany, CA, USA). Skin conductance responses (SCRs)

were recorded using a constant voltage system with Ag/AgCl electrodes placed on the hypothenar eminence of the left hand. Responses were amplified and digitized at 1000 Hz (CED 2502 and micro 1401, Cambridge Electronic Design, Cambridge, UK). A 3 Tesla system (TRIO; Siemens, Erlangen, Germany) equipped with a 32-channel head coil was used for acquisition of the fMRI data. Thirty-six transversal slices (slice thickness, 1.5 mm; no gap) were obtained in each volume using a high-resolution T2*-sensitive gradient echo-planar imaging sequence (repetition

time, 2680 ms; echo time, 30 ms; flip angle, 80°; field of view, 219 × 219 mm; in-plane resolution, 1.5 × 1.5 mm; parallel imaging with acceleration factor 2). Functional image coverage included the medial temporal Montelukast Sodium lobe, parts of the prefrontal cortex and brainstem areas. High-resolution T1-weighted anatomical images (1 × 1 ×1 mm³) were also acquired using a magnetization prepared rapid gradient echo sequence. We acquired four sessions consisting of between 210 and 250 volumes each, to sustain optimal quality of the high-resolution fMRI data. The sessions succeeded with the shortest possible latency (40–50 s) and the experimental presentation was not interrupted during scanner breaks in order to assure continuous learning unbiased by attentional changes caused by experimental breaks.

7% agar and containing 100 μL of overnight bacterial culture was

7% agar and containing 100 μL of overnight bacterial culture was spotted after solidification with 5 μL suspensions of the 16 isolated bacteriophages. The plates were incubated at 25 °C, and the occurring lysis was investigated after 18–24 h. Propagation of phages for genome isolation was initiated according to the double agar layer method (Adams, 1959). After incubation at 25 °C for 18 h, the top layers were collected and placed into 10 mL SM buffer. ATR inhibitor After gentle agitation for 4 h at 25 °C, 2 mL chloroform was added, mixed, and incubated at 4 °C for 18 h. The resulting suspension was decanted over the chloroform and centrifuged at 5000 g for 40 min at 10 °C to eliminate the bacterial cells;

the supernatant was centrifuged again at 16 000 g for 60 min at 10 °C to collect the phage particles. The pellet was resuspended in 500 μL EDTA (pH 8.0) and 500 μL TES (10 mM Tris–HCl, 10 mM EDTA, 2% SDS, pH 8.0). After vigorous vortexing

for 30 s, the solution was incubated for 30 min at 65 °C. The proteins were precipitated with protein precipitation solution (Sigma-Aldrich), incubated on ice for 5 min, and centrifuged at 15 000 g for 4 min at 10 °C. The nucleic acid was precipitated with 0.1 volume 3 M Na-acetate and 1 volume ethanol. The pellet was washed with 70% ethanol; dried, and resuspended in 20 μL TE buffer (10 mM Tris–HCl, 1 mM EDTA, pH 8.0). To determine the type of the genome nucleic acid, RNase and DNase treatments were carried out according to the manufacturer’s (Sigma) instructions. Restriction fragment pattern differences of the investigated phage DNAs were examined BTK signaling pathway inhibitor with 21 different restriction endonucleases: AatI, AluI, ApaI, BamHI, BcuI, BglI, BglII, Bsh1236I, ClaI, DraI, EcoRI, HaeIII, Hin6I, HindIII, KpnI, MspI, NotI, PstI, RsaI, SacI, TaqI (Fermentas, Thermo Scientific). The growth Baf-A1 supplier characteristics of the Bf7 were investigated using the double layer method

(Adams, 1959) on its host, incubated for 18–48 h at different temperatures (5, 10, 20, 25, 30, and 35 °C), and the resulting plaque numbers and morphologies were compared. The single-step growth curve experiments were carried out according to the protocol of Keel et al. (2002), with minor modifications. The LB liquid medium was supplemented with glucose (0.3%), CaCl2 (0.075 mM), MgSO4 (2 mM), and FeCl2 (0.004 mM) according to the suggestions of Sambrook et al. (1989), for higher phage titer. Exponential-phase culture of P. tolaasii 2342T was treated with bacteriophage solution to have a multiplicity of infection (MOI) of 0.06. To visualize phage morphology with transmission electron microscopy, phage plaques were picked and placed in SM buffer. Aliquots were mounted on a carbon-coated formvar film supported by a 300 mesh copper grid. Samples were negatively stained with 1% uranyl acetate and examined by a Zeiss CEM 902 electron filtering electron microscope.

Active TB needs to be excluded before considering treatment of la

Active TB needs to be excluded before considering treatment of latent infection, which is usually with isoniazid monotherapy for 6 months or isoniazid/rifampicin find more for 3 months. Starting HAART reduces the risk of reactivation of latent TB infection and is effective at reducing the incidence of new TB. We recommend that all HIV-positive patients should be offered HAART in line with the British HIV Association (BHIVA) treatment guidelines [2]. We recommend daily TB treatment whenever possible. Treatment

may be given 5 days per week, but should be intensively supervised. This option may be useful in hospital or other highly supervised settings. Three-times-per-week directly observed therapy (DOT) should only be given to patients who are stable and clinically well and where local logistics

enable this to be undertaken successfully. We do not recommend twice-weekly see more DOT for treatment of HIV/TB coinfected patients, especially in those with CD4 counts <100 cells/μL, as it has been associated with unacceptably high rates of rifamycin resistance. In cases where multiple drug resistance is not suspected, treatment should be started with four drugs (typically rifampicin, isoniazid, pyrazinamide and ethambutol) until sensitivities are known. We recommend a 6-month treatment regimen for drug-sensitive TB outside of the central nervous system (CNS). This is usually four drugs for 2 months, followed by isoniazid and rifampicin for a further 4 months (at least 182 doses of isoniazid and rifampicin and 56 doses of pyrazinamide and ethambutol in total). In drug-sensitive TB affecting Orotidine 5′-phosphate decarboxylase the CNS we recommend 9 months of treatment. This usually consists of four drugs for 2 months, followed by 7 months of isoniazid and rifampicin [3]. Drug-resistant disease should be treated only by specialists with experience in such cases, in line with NICE guidelines [1]. Careful attention should be paid to drug interactions between TB drugs, HAART and other therapy. Rifampicin is a powerful inducer of cytochrome 450 (CYP450)

and has effects on several metabolic pathways and P-glycoprotein (PgP). Rifampicin interacts with protease inhibitors (PIs), NNRTIs, chemokine (C-C motif) receptor 5 (CCR5) antagonists, and antimicrobials such as fluconazole. Rifabutin is a less potent inducer of CYP450 and may be used as an alternative to overcome some of these difficulties (for up-to-date drug interaction data go to http://www.hiv-druginteractions.org). Toxicity profiles of antiretrovirals and anti-tuberculosis drugs overlap and make it difficult to determine the causative drug. For example, rashes occur with NNRTIs, rifampicin and isoniazid. Isoniazid and stavudine both cause peripheral neuropathy. All patients on isoniazid should take pyridoxine to try and prevent this complication.